Reference
Glossary
A practical A–Z reference for the most important terms in finance and crypto — written to be read in under 30 seconds each.
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4 terms- 51% AttackA scenario where a single party controls more than half of a blockchain’s mining power or stake, allowing them to reorganize blocks, censor transactions, or double-spend coins. Large networks like Bitcoin make this prohibitively expensive in practice.
- 401(k)An employer-sponsored retirement plan in the US that lets workers contribute pre-tax wages, often with matching from the employer. Funds grow tax-deferred and are taxed as ordinary income when withdrawn in retirement.
- 529 PlanA US tax-advantaged savings account designed to fund education expenses. Earnings grow tax-free and qualified withdrawals for tuition, books, or room and board are not taxed at the federal level.
- 1099A series of US tax forms used to report income from sources other than an employer, such as freelance work, dividends, or interest. Issuers send copies to both the recipient and the IRS so the income can be matched on a tax return.
A
24 terms- AaveA decentralized lending and borrowing protocol on Ethereum and other EVM chains. Users deposit assets to earn interest or borrow against collateral, with rates set algorithmically by supply and demand. Aave pioneered flash loans.
- ABI (Application Binary Interface)A JSON specification describing how to call a smart contract’s functions and decode its events. Wallets, dApps, and tools use the ABI to translate between human-readable calls and the binary data the EVM executes.
- Account AbstractionAn Ethereum design (formalized in ERC-4337) that lets user accounts behave like programmable smart contracts. It enables features like social recovery, gasless transactions, batched operations, and custom signature schemes without changing the protocol layer.
- Accounts PayableMoney a business owes to its suppliers and vendors for goods or services received but not yet paid for. Listed as a current liability on the balance sheet, it represents short-term debt typically due within 30 to 90 days.
- Accounts ReceivableMoney owed to a business by its customers for goods or services already delivered. Recorded as a current asset on the balance sheet, it represents revenue earned that has not yet been collected in cash.
- ACH TransferAn electronic bank-to-bank transfer in the US processed through the Automated Clearing House network. Used for direct deposit, bill pay, and peer-to-peer transfers, ACH is cheap but typically settles in one to three business days.
- AI Agents (Crypto)Autonomous software agents that hold a wallet and act on-chain — trading, voting, posting, or coordinating with other agents. The space exploded in 2024 with frameworks like Eliza and Virtuals giving each agent its own token and persona.
- AirdropA free distribution of tokens to a set of wallets, typically used to bootstrap a community, reward early users, or decentralize ownership. Eligibility is often based on prior on-chain activity within the issuing protocol.
- AlphaThe excess return of an investment over a benchmark index, after adjusting for risk. Positive alpha indicates an investment outperformed expectations; negative alpha indicates underperformance. It is often used to evaluate active managers.
- AltcoinAny cryptocurrency other than Bitcoin. The term covers everything from established networks like Ethereum and Solana to thousands of smaller experimental tokens, ranging widely in technology, market cap, and credibility.
- AltseasonA period in the crypto market when altcoins outperform Bitcoin, often dramatically. Altseasons typically follow a Bitcoin rally as profits rotate into smaller-cap assets in search of higher returns.
- AML (Anti-Money Laundering)Laws and procedures designed to prevent criminals from disguising illicit funds as legitimate income. Crypto exchanges and custodians implement AML controls, including transaction monitoring and reporting of suspicious activity.
- AMM (Automated Market Maker)A type of decentralized exchange that uses a mathematical formula and a liquidity pool to set asset prices, instead of an order book. Uniswap’s constant-product formula (x·y=k) is the canonical example.
- AmortizationThe process of paying down a loan through regular installments that cover both interest and principal. Early payments are interest-heavy; later payments shift toward principal. Also refers to spreading the cost of an intangible asset over its useful life.
- AnnuityA contract with an insurance company that pays out a stream of income, often for life, in exchange for an upfront or installment premium. Used primarily as a retirement-income tool to hedge against outliving savings.
- APR (Annual Percentage Rate)The yearly cost of borrowing expressed as a percentage of the loan amount, including fees but not compounding. APR makes it easier to compare loans by standardizing how interest and certain costs are disclosed.
- AptosA Layer 1 blockchain built by former Meta engineers from the Diem project. It uses the Move programming language and a parallel execution engine designed for high throughput and low latency.
- APY (Annual Percentage Yield)The yearly return on a deposit or investment, accounting for compound interest. Higher than APR for the same nominal rate. In DeFi, APY is also used to express yield-farming or staking returns, often varying with utilization.
- ArbitrageProfiting from price differences for the same asset across markets by buying in the cheaper venue and selling in the pricier one. In efficient markets, arbitrage opportunities are small and short-lived.
- ArbitrumA leading Ethereum Layer 2 using optimistic rollup technology. It executes transactions off-chain and posts compressed data back to Ethereum, offering far lower fees while inheriting Ethereum’s security.
- AssetAnything of economic value owned by a person or company that is expected to provide future benefit. Assets range from cash and securities to real estate, equipment, and intellectual property.
- Asset AllocationThe process of dividing a portfolio across asset classes — stocks, bonds, cash, real estate, and alternatives — to balance risk and return based on goals, time horizon, and risk tolerance.
- Auto LoanA secured loan used to purchase a vehicle, with the car itself serving as collateral. Repaid in fixed monthly installments over a set term, typically three to seven years. Default can result in repossession.
- AvalancheA Layer 1 blockchain platform organized into three interoperable chains (X-Chain, C-Chain, P-Chain) and supporting custom subnets. Known for fast finality and EVM compatibility on its C-Chain.
B
26 terms- Balance of PaymentsA statement summarizing all economic transactions between a country and the rest of the world over a period. Includes the current account (trade and income) and the capital and financial accounts.
- Balance SheetA financial statement showing what a company owns (assets), what it owes (liabilities), and the residual value belonging to shareholders (equity) at a single point in time. Assets always equal liabilities plus equity.
- BankruptcyA legal process for individuals or businesses that cannot repay their debts. Depending on the chapter filed, outcomes range from full liquidation of assets (Chapter 7) to court-supervised restructuring (Chapter 11 or 13).
- BaseAn Ethereum Layer 2 built by Coinbase using the OP Stack. Optimized for consumer apps and onboarding, it offers low fees, EVM compatibility, and tight integration with Coinbase products.
- Bear MarketA prolonged period of falling asset prices, conventionally defined as a drop of 20% or more from recent highs. In crypto, bear markets ("crypto winters") tend to be deeper and longer than in equities.
- BeneficiaryA person or entity designated to receive assets from a life insurance policy, retirement account, trust, or will upon the owner’s death. Naming beneficiaries lets assets pass directly without going through probate.
- BerachainAn EVM-compatible Layer 1 built on a novel "proof-of-liquidity" consensus, where validators are rewarded for directing liquidity to applications. Launched in 2025 with a strong DeFi-native focus.
- BetaA measure of how much a security’s price moves relative to the overall market. A beta of 1 moves with the market; above 1 is more volatile, below 1 is less. Used to estimate systematic risk.
- Bid-Ask SpreadThe difference between the highest price a buyer will pay (bid) and the lowest price a seller will accept (ask) for an asset. Tighter spreads indicate more liquid markets; wider spreads add to trading cost.
- BIP (Bitcoin Improvement Proposal)A formal design document proposing a change to Bitcoin — to the protocol, conventions, or processes. BIPs go through community review and discussion before potential implementation. The model inspired EIPs on Ethereum.
- Bitcoin (BTC)The first cryptocurrency, launched in 2009 by the pseudonymous Satoshi Nakamoto. It runs on a decentralized proof-of-work blockchain with a hard cap of 21 million coins, and is widely treated as digital gold.
- Bitcoin DominanceBitcoin’s share of the total cryptocurrency market capitalization, expressed as a percentage. Traders watch dominance as a signal of capital rotation between BTC and altcoins.
- Black Swan EventA rare, high-impact event that is hard to predict and is rationalized only in hindsight. Coined by Nassim Taleb, the term is often applied to market crashes, sudden defaults, or geopolitical shocks.
- BlockA bundle of transactions cryptographically linked to the previous block, forming a blockchain. Each block contains a header (with metadata and the prior block’s hash) and the transactions confirmed in that round.
- BlockchainA distributed, append-only ledger maintained by a network of computers that agree on its state through a consensus mechanism. Each new block references the prior one, making the history practically immutable.
- Blue Chip StockShares of a large, well-established, financially sound company with a long track record of stable earnings, often paying dividends. Examples include household names that lead their industries.
- BNB ChainAn EVM-compatible Layer 1 originally launched by Binance, optimized for low fees and high throughput. It hosts a large ecosystem of DeFi, gaming, and consumer dApps.
- BondA debt security in which an investor lends money to an issuer (government or corporation) for a fixed period in exchange for periodic interest (coupon) payments and the return of principal at maturity.
- Book ValueThe accounting value of a company’s equity — total assets minus total liabilities — as recorded on its balance sheet. Often compared to market value to gauge whether a stock is over- or under-valued.
- Borrowing (DeFi)Taking out a crypto loan from a lending protocol by depositing collateral worth more than the loan. Interest accrues continuously, and if collateral value falls below a threshold the position is liquidated.
- BridgeA protocol that lets assets or messages move between separate blockchains. Most bridges lock tokens on one chain and mint a wrapped representation on another. Bridges have historically been a major source of crypto exploits.
- BudgetA plan that allocates expected income across spending, saving, and debt repayment over a defined period. Budgeting is the foundation of personal finance and helps align day-to-day choices with longer-term goals.
- Bull MarketA prolonged period of rising asset prices and investor optimism. Conventionally marked by gains of 20% or more from recent lows. Bull markets can last months to years.
- Bull RunA sharp, sustained rally in crypto prices, often driven by a mix of macro liquidity, narrative cycles, and Bitcoin halvings. Bull runs are typically short, intense, and followed by deep corrections.
- BurnPermanently removing tokens from circulation by sending them to an unspendable address. Burns reduce supply and are often used to align incentives, return value to holders, or destroy NFTs.
- Byzantine Fault ToleranceThe property of a distributed system that lets it reach agreement even when some participants act maliciously or fail. BFT is a foundational concept underlying blockchain consensus mechanisms.
C
33 terms- CAGR (Compound Annual Growth Rate)The constant annual rate at which an investment would have grown over a period if it had compounded smoothly. A useful way to compare returns across investments and time horizons of different lengths.
- Call OptionA contract giving the holder the right, but not the obligation, to buy an underlying asset at a set strike price before a given expiration date. Used to speculate on or hedge against price increases.
- Capital GainThe profit from selling an asset for more than its purchase price. Gains on assets held longer than a year are typically taxed at lower long-term rates than short-term gains.
- Capital Gains TaxTax owed on the profit from selling a capital asset like stocks, real estate, or crypto. Rates depend on holding period and jurisdiction, with long-term gains usually taxed more favorably than short-term.
- Capital LossThe loss realized when an asset is sold for less than its purchase price. Capital losses can offset capital gains for tax purposes and, in some jurisdictions, a limited amount of ordinary income.
- CardanoA proof-of-stake Layer 1 blockchain founded by Ethereum co-founder Charles Hoskinson. Known for a research-driven, peer-reviewed development approach and its native Haskell-based smart-contract language.
- Cash FlowThe net amount of cash moving into and out of a business or individual’s accounts over a period. Positive cash flow indicates more money is coming in than going out, supporting solvency and reinvestment.
- Cash Flow StatementA financial statement that tracks cash inflows and outflows from operating, investing, and financing activities. It complements the income statement by showing actual liquidity rather than accrual-based earnings.
- CDP (Collateralized Debt Position)A smart-contract vault holding crypto collateral against which a user mints a stablecoin or borrows another asset. CDPs are central to protocols like MakerDAO, where DAI is created against locked collateral.
- CeFi (Centralized Finance)Crypto financial services run by a centralized company that custodies user assets — exchanges, brokers, and lenders like Coinbase or Binance. Contrasted with DeFi, where users hold their own keys.
- Certificate of Deposit (CD)A bank deposit that locks funds for a fixed term in exchange for a guaranteed interest rate, usually higher than a regular savings account. Withdrawing early typically incurs a penalty.
- CEX (Centralized Exchange)A crypto exchange operated by a single company that custodies user funds and matches trades through a traditional order book. Examples include Binance, Coinbase, Kraken, and OKX.
- ChainlinkThe dominant decentralized oracle network, supplying off-chain data — prices, randomness, weather — to smart contracts across many blockchains. Used by most major DeFi protocols for pricing and other inputs.
- Checking AccountA bank account designed for everyday transactions: paying bills, receiving deposits, and making purchases with a debit card. Typically offers little or no interest in exchange for high liquidity.
- Circulating SupplyThe number of tokens of a given cryptocurrency that are publicly available and tradable. Excludes tokens that are locked, reserved by the team, or yet to be issued. Used to compute market capitalization.
- CoinA cryptocurrency that runs on its own native blockchain, like Bitcoin (Bitcoin blockchain) or ETH (Ethereum). Distinguished from tokens, which are issued on top of an existing chain.
- Cold WalletA crypto wallet that stores private keys offline, isolated from the internet. Hardware wallets and paper wallets are common forms. Cold storage is the safest option for long-term holdings.
- CollateralAn asset pledged to a lender to secure a loan. If the borrower defaults, the lender can seize the collateral to recover losses. Mortgages use the home as collateral; auto loans use the car.
- Common StockThe standard form of equity ownership in a corporation. Holders typically have voting rights and may receive dividends, but rank below bondholders and preferred shareholders in the event of liquidation.
- Compound InterestInterest calculated on both the original principal and previously accumulated interest. Compounding accelerates growth over time and is the engine behind long-term wealth building.
- Consensus MechanismThe protocol a blockchain uses to agree on the next block of transactions among distributed, untrusted participants. Proof of Work and Proof of Stake are the two dominant approaches.
- Corporate BondA debt security issued by a company to raise capital. Pays periodic interest and returns principal at maturity. Yields are higher than government bonds to compensate for greater default risk.
- Coupon RateThe annual interest rate a bond pays on its face value, expressed as a percentage. A 5% coupon on a $1,000 bond pays $50 per year, regardless of market price changes.
- CPI (Consumer Price Index)A measure of the average change over time in prices paid by urban consumers for a basket of goods and services. The most-watched gauge of inflation, used to adjust wages, benefits, and policy decisions.
- Credit LimitThe maximum amount a lender allows a borrower to charge to a credit card or revolving line of credit. Set based on creditworthiness, income, and existing debt obligations.
- Credit RatingAn assessment of a borrower’s ability to repay debt, issued for governments and corporations by agencies like S&P, Moody’s, and Fitch. Ratings range from AAA (lowest risk) down to D (default).
- Credit ReportA detailed record of a person’s borrowing and repayment history, compiled by credit bureaus. Lenders use it to evaluate loan applications. Consumers can review reports to spot errors and fraud.
- Credit ScoreA three-digit number that summarizes a borrower’s creditworthiness, derived from their credit report. Higher scores unlock lower interest rates and better loan terms. The most common model is FICO.
- Credit UtilizationThe percentage of available revolving credit currently being used. Below 30% is generally considered healthy. High utilization is one of the largest negative factors in credit-score calculations.
- Cross-ChainFunctionality that lets assets, data, or messages move between separate blockchains. Implemented through bridges, messaging protocols (LayerZero, Wormhole), or shared-security architectures like Cosmos IBC.
- CryptocurrencyA digital asset secured by cryptography and issued and transferred on a decentralized blockchain. Cryptocurrencies operate without a central authority and can serve as money, collateral, or programmable value.
- Current RatioA liquidity metric calculated as current assets divided by current liabilities. A ratio above 1 indicates a company can cover its short-term obligations from its short-term assets.
- Custodial WalletA crypto wallet where a third party (usually an exchange) holds the private keys on the user’s behalf. Easier to recover but exposes funds to platform risk — counterparty failure or seizure.
D
24 terms- DAO (Decentralized Autonomous Organization)An internet-native organization governed by smart contracts and token-holder votes rather than a traditional corporate structure. DAOs manage everything from DeFi protocols to investment funds and social clubs.
- DAO TreasuryA pool of crypto assets owned and controlled by a DAO, typically held in a multisig or governance contract. Spending requires approval through the DAO’s formal voting process.
- dApp (Decentralized Application)An application whose backend logic runs on a blockchain via smart contracts rather than centralized servers. Frontends are usually conventional web apps that read from and write to the chain.
- Data AvailabilityThe guarantee that the data needed to verify a blockchain’s state has been published and can be retrieved by anyone. A core focus of modular blockchain design and projects like Celestia and EigenDA.
- Day TradingBuying and selling securities within the same trading day to profit from short-term price movements. Day trading requires significant time, discipline, and capital, and most participants underperform the market.
- Debt-to-Equity RatioA leverage metric calculated as total liabilities divided by shareholder equity. Higher ratios indicate more aggressive financing through debt, which amplifies both returns and risk.
- Debt-to-Income RatioA borrower’s total monthly debt payments divided by gross monthly income, expressed as a percentage. Lenders use DTI to assess ability to take on additional debt; lower is better.
- DeductibleThe amount a policyholder pays out of pocket on an insurance claim before the insurer begins covering costs. Higher deductibles generally mean lower premiums and vice versa.
- DefaultFailure to meet the legal obligations of a loan, such as missing scheduled payments. Default damages credit, can trigger penalties, and may lead to collateral seizure or legal action.
- DeFi (Decentralized Finance)Financial services — lending, trading, derivatives, insurance — built on smart contracts and accessible without intermediaries. DeFi is permissionless: anyone with a wallet can use any protocol.
- DeflationA sustained decrease in the general price level of goods and services. While it boosts purchasing power, deflation can also stall growth as consumers and businesses delay spending in anticipation of lower prices.
- DelegationAssigning your stake or voting power to another participant — typically a validator or trusted delegate — without transferring ownership. Common in proof-of-stake networks and DAO governance.
- DelinquencyA state in which a borrower has missed one or more required loan payments. Delinquencies are reported to credit bureaus and grow more damaging the longer they persist before becoming defaults.
- DePIN (Decentralized Physical Infrastructure)Networks that crowdsource real-world infrastructure — wireless coverage, storage, mapping, energy — by paying token rewards to participants who contribute hardware. Examples include Helium, Filecoin, and Hivemapper.
- DepreciationThe accounting practice of spreading the cost of a tangible asset over its useful life, reflecting wear, age, or obsolescence. Reduces taxable income without affecting cash flow.
- DepressionA severe and prolonged downturn in economic activity, marked by sharp declines in GDP, sustained high unemployment, and major financial-system stress. Far more rare and severe than a recession.
- DerivativeA financial contract whose value is derived from an underlying asset like a stock, bond, commodity, or index. Common types include options, futures, forwards, and swaps. Used for hedging or speculation.
- DEX (Decentralized Exchange)A non-custodial crypto exchange that lets users trade directly from their wallets via smart contracts. Most DEXes use AMMs (Uniswap, Curve), though some use on-chain order books.
- DiversificationSpreading investments across different assets, sectors, and geographies to reduce exposure to any single risk. The core principle behind portfolio construction and modern portfolio theory.
- DividendA portion of a company’s profits paid to shareholders, usually quarterly. Dividends provide income to investors and signal financial health, though paying them limits funds available for reinvestment.
- Dollar-Cost AveragingInvesting a fixed amount at regular intervals regardless of price. The approach reduces timing risk and emotional decision-making, smoothing the average purchase price over time.
- Double SpendingThe risk that the same digital asset could be spent twice. Blockchain consensus prevents double spending by ensuring all participants agree on a single transaction history.
- Dow Jones Industrial AverageA price-weighted index of 30 large, publicly traded US companies. Despite tracking only a small slice of the market, the Dow remains one of the most widely cited equity benchmarks.
- Down PaymentThe portion of a purchase price paid upfront in cash, with the rest financed through a loan. Larger down payments lower monthly payments, total interest, and often qualify for better rates.
E
20 terms- Earnings Per Share (EPS)A company’s net profit divided by the number of outstanding shares. EPS is a key profitability metric and a primary driver of stock prices and analyst valuations.
- EBITDAEarnings Before Interest, Taxes, Depreciation, and Amortization. A proxy for operating cash flow that strips out financing and accounting decisions, used to compare profitability across companies and industries.
- EigenLayerA protocol on Ethereum that lets stakers reuse their staked ETH to secure additional services (Actively Validated Services), pioneering the concept of restaking and shared security.
- EIP (Ethereum Improvement Proposal)A formal proposal for changes to Ethereum — the protocol, standards, or processes. EIPs go through community discussion and review; well-known examples include ERC-20 (tokens) and EIP-1559 (fee market).
- Emergency FundA liquid cash reserve set aside to cover unexpected expenses or income loss, typically equal to three to six months of essential spending. The foundation of personal financial resilience.
- Emerging MarketsEconomies in the process of rapid industrialization and integration with global markets. Examples include Brazil, India, China, and South Africa. Higher growth potential comes with greater volatility and political risk.
- ENS (Ethereum Name Service)A decentralized naming system on Ethereum that maps human-readable names like "alice.eth" to wallet addresses, content hashes, and other resources. The on-chain equivalent of DNS.
- EquityOwnership in an asset after subtracting any debts against it. In a company, equity is the value belonging to shareholders; in a home, it is market value minus the outstanding mortgage balance.
- ERC-20The dominant Ethereum token standard for fungible tokens. ERC-20 defines a common set of functions (transfer, balanceOf, approve) that wallets and dApps rely on to interact with any compliant token.
- ERC-721The Ethereum standard for non-fungible tokens (NFTs). Each ERC-721 token has a unique ID, allowing it to represent ownership of a distinct digital or real-world item.
- ERC-1155An Ethereum token standard that supports both fungible and non-fungible tokens within a single contract. Often used in gaming where one collection can hold currency, items, and unique gear.
- EscrowAn arrangement in which a neutral third party holds funds or assets on behalf of two transacting parties until contract conditions are met. Common in real-estate purchases and large transactions.
- ESOP (Employee Stock Ownership Plan)A program that gives employees ownership in their company through stock allocations, typically held in a trust. ESOPs align employee and shareholder interests and offer tax advantages to the sponsoring company.
- Estate TaxA tax levied on the transfer of a deceased person’s assets above a certain exemption threshold. In the US it applies only to large estates, but rules vary widely across jurisdictions.
- ETF (Exchange-Traded Fund)An investment fund that holds a basket of assets and trades on a stock exchange like a single share. ETFs offer diversification, low fees, and intraday liquidity, making them popular for passive investing.
- Ethereum (ETH)The dominant smart-contract platform, launched in 2015 by Vitalik Buterin and others. Its native asset ETH is used to pay transaction fees (gas) and to secure the network through staking.
- EVM (Ethereum Virtual Machine)The runtime environment that executes Ethereum smart contracts. Many other chains (BNB Chain, Polygon, Avalanche C-Chain, Arbitrum, Base) implement the EVM so they can run the same code.
- Exchange RateThe price of one currency in terms of another. Exchange rates are set by global currency markets (forex) or pegged by central banks, and influence trade, travel, and cross-border investment.
- ExpenseA cost incurred to generate revenue or maintain operations. For individuals, expenses are outflows like rent, food, and bills; for companies, they reduce taxable income on the income statement.
- Expiration DateThe last day on which an option or other derivative contract is valid. After expiration, the contract either settles or becomes worthless, depending on whether it is in or out of the money.
F
20 terms- FarcasterA decentralized social network protocol where users own their identity and graph through Ethereum-based accounts. Best known for enabling on-chain mini-apps ("Frames") inside the social feed.
- FDIC InsuranceFederal Deposit Insurance Corporation coverage that protects US bank deposits up to $250,000 per depositor, per bank, per ownership category. Funded by member banks, not taxpayers.
- FDV (Fully Diluted Valuation)A token’s market cap calculated as if every token in the maximum supply were already in circulation. FDV signals potential future dilution from unlocks, often much higher than the current market cap.
- Federal Funds RateThe target interest rate at which US banks lend reserves to one another overnight, set by the Federal Reserve. It is the Fed’s primary tool for steering monetary policy and influencing broader rates.
- Federal ReserveThe central bank of the United States, responsible for monetary policy, financial stability, and bank supervision. Through interest-rate decisions and asset purchases, it heavily shapes US and global markets.
- FICO ScoreThe most widely used US credit-score model, ranging from 300 to 850. FICO weighs payment history, amounts owed, length of history, new credit, and credit mix to predict default risk.
- Fiscal PolicyGovernment decisions on taxation and spending used to influence the economy. Expansionary fiscal policy stimulates growth through tax cuts or higher spending; contractionary policy does the opposite.
- Fixed IncomeInvestments that pay scheduled, predictable returns — primarily bonds, but also CDs and certain annuities. Fixed-income holdings typically provide lower returns than equities in exchange for lower volatility.
- Flash LoanAn uncollateralized loan that must be borrowed and repaid within a single Ethereum transaction. If the borrower fails to repay, the entire transaction reverts. Used for arbitrage, refinancing, and exploits.
- Floor PriceThe lowest listed price for any item in an NFT collection. Often used as a quick gauge of a collection’s market value and momentum, though thin volume can make it noisy.
- FOMOFear Of Missing Out — the emotional pull to buy an asset that is rapidly appreciating, often near a local top. FOMO is a major driver of retail behavior in crypto bull markets.
- ForeclosureThe legal process by which a lender takes possession of a property after the borrower defaults on the mortgage. The home is typically sold to recover the outstanding loan balance.
- Forex (Foreign Exchange)The global market where currencies are traded against each other. With over $7 trillion in daily volume, forex is the largest and most liquid financial market in the world.
- ForkA change in a blockchain’s protocol that creates a divergent path. Soft forks remain backward-compatible; hard forks split the network into two incompatible chains, sometimes producing a new asset.
- Free Cash FlowCash generated from operations after subtracting capital expenditures. Free cash flow shows how much money a business has left to pay dividends, buy back stock, reduce debt, or reinvest.
- Front-RunningPlacing a transaction ahead of a known, pending transaction to profit from the price impact it will cause. On public blockchains, bots scan the mempool for opportunities — a key form of MEV.
- FUDFear, Uncertainty, and Doubt — negative or misleading information spread to push asset prices down or discourage participation. The mirror image of FOMO.
- Full NodeA computer running blockchain software that downloads and independently verifies every block and transaction. Full nodes enforce consensus rules and form the backbone of a decentralized network.
- Funding RateA periodic payment between long and short holders of perpetual futures, designed to keep the contract price tethered to the spot price. Positive rates mean longs pay shorts; negative rates mean the reverse.
- FuturesStandardized contracts to buy or sell an asset at a predetermined price on a specific future date. Used by producers and consumers to hedge price risk and by speculators to bet on price moves.
G
11 terms- GameFiGames that integrate crypto economics — players own in-game assets as NFTs and earn or trade tokens. The category was kicked off by Axie Infinity and remains a major experimental frontier.
- GasThe unit measuring the computational work required to execute an Ethereum transaction or smart-contract operation. Each opcode has a fixed gas cost, and users pay validators per unit of gas consumed.
- Gas FeeThe total cost of an Ethereum transaction, calculated as gas used multiplied by the gas price (in gwei). Fees compensate validators for processing the transaction and rise during network congestion.
- GDP (Gross Domestic Product)The total monetary value of all goods and services produced within a country during a specific period. GDP is the headline measure of economic size and growth.
- Generative ArtArt created by an algorithm, often with on-chain randomness producing each unique output at mint time. Platforms like Art Blocks made generative NFTs a major segment of the digital-art market.
- Genesis BlockThe first block ever created on a blockchain. Bitcoin’s genesis block, mined in January 2009, contains a famous embedded message referencing a Times headline about bank bailouts.
- GoodwillAn intangible accounting asset representing the premium paid in an acquisition above the fair value of identifiable assets. Goodwill captures things like brand, customer relationships, and synergies.
- Governance TokenA token that grants holders voting power over a protocol’s parameters, treasury, or upgrades. Most major DeFi protocols issue governance tokens to decentralize control over time.
- Gross ProfitRevenue minus the direct cost of producing goods or services sold (cost of goods sold). Gross profit reflects production efficiency before operating expenses, taxes, and financing costs.
- Growth StockShares of a company expected to grow earnings significantly faster than the market average. Growth stocks typically reinvest profits rather than paying dividends, and trade at higher valuations.
- GweiA subunit of Ether equal to one billionth of an ETH (10⁻⁹ ETH). Gas prices on Ethereum are quoted in gwei because individual transactions cost only fractions of an ETH.
H
14 terms- HalvingA scheduled event in Bitcoin that cuts the block reward paid to miners in half, occurring roughly every four years. Halvings tighten new supply and have historically preceded major price cycles.
- Hard ForkA protocol change that is not backward-compatible, requiring all nodes to upgrade. Hard forks can split a chain into two — Bitcoin Cash forking from Bitcoin and Ethereum from Ethereum Classic are examples.
- Hardware WalletA physical device that stores crypto private keys offline and signs transactions internally. Hardware wallets like Ledger and Trezor are the standard for securely holding meaningful amounts of crypto.
- HashA fixed-length string output produced by running data through a hash function. Hashes are deterministic and one-way: the same input always yields the same hash, but the input cannot be recovered from it.
- Hash FunctionA cryptographic algorithm that maps input data of any size to a fixed-length output. Good hash functions are fast, deterministic, and collision-resistant. Bitcoin uses SHA-256.
- Hash RateThe total computing power dedicated to mining a proof-of-work blockchain, measured in hashes per second. Higher hash rates mean stronger security and harder competition to mine the next block.
- Hedge FundA pooled investment vehicle for accredited investors that uses a wide range of strategies — long/short, arbitrage, derivatives, leverage — to seek returns uncorrelated with traditional markets.
- HedgingUsing offsetting positions, often in derivatives, to reduce exposure to a specific risk. Hedging caps both downside and upside; it is about insurance, not pure profit.
- HELOC (Home Equity Line of Credit)A revolving line of credit secured by the equity in a home. Borrowers can draw, repay, and redraw funds during a set period. Interest rates are usually variable and tied to a benchmark.
- HODLCrypto slang for holding an asset through volatility rather than trading it. Originated from a 2013 Bitcointalk post titled "I AM HODLING" and now backronymed as "Hold On for Dear Life".
- Home Equity LoanA lump-sum loan secured by the equity in a borrower’s home, typically with a fixed interest rate and term. Often used for major expenses like renovations or debt consolidation.
- Hot WalletA crypto wallet that is connected to the internet — mobile, desktop, or browser-extension wallets. More convenient than cold storage but more exposed to phishing, malware, and remote attacks.
- HSA (Health Savings Account)A US tax-advantaged account paired with a high-deductible health plan. Contributions, growth, and qualified medical withdrawals are all tax-free, making HSAs one of the most efficient savings vehicles available.
- HyperliquidA high-performance Layer 1 built around an on-chain perpetuals exchange. Known for fast execution, deep liquidity, and a points program that drove rapid adoption ahead of its 2024 token launch.
I
14 terms- ICO (Initial Coin Offering)A fundraising mechanism where a project sells newly issued tokens directly to the public in exchange for crypto. Popular in 2017–18, ICOs largely gave way to IDOs and other structured launches.
- IDO (Initial DEX Offering)A token launch executed through a decentralized exchange, often via a launchpad or liquidity-bootstrapping pool. IDOs replaced ICOs as the dominant token-distribution model after 2020.
- Impermanent LossThe opportunity cost suffered by AMM liquidity providers when the prices of pooled assets diverge. The loss is "impermanent" because it only realizes if the LP withdraws while prices are skewed.
- Income StatementA financial statement summarizing a company’s revenues, expenses, and profits over a period. Also called the profit and loss (P&L) statement, it is one of the three core financial reports.
- Income TaxA tax levied by governments on the income of individuals and businesses. Rates are typically progressive — higher incomes are taxed at higher marginal rates — though structures vary by jurisdiction.
- Index FundA mutual fund or ETF designed to replicate the performance of a market index like the S&P 500. Index funds offer broad diversification and low fees, and consistently outperform most active managers.
- InflationA sustained increase in the general price level of goods and services, eroding purchasing power. Central banks typically target around 2% annual inflation as a balance between growth and price stability.
- IntentsA pattern in which users sign a desired outcome ("swap X for at least Y") and let solvers compete to execute it optimally across chains and venues. Powers cross-chain UX in protocols like CoW Swap and Across.
- Interest RateThe cost of borrowing money or the reward for saving it, expressed as a percentage of the principal per period. Interest rates ripple through every asset price and influence economic activity.
- Internal Rate of Return (IRR)The discount rate that makes the net present value of a series of cash flows equal to zero. Used to evaluate the attractiveness of investments and capital projects.
- Inverted Yield CurveA situation in which short-term bond yields exceed long-term yields — the opposite of normal. Inversions, especially between the 2-year and 10-year Treasuries, have preceded most modern US recessions.
- IPFS (InterPlanetary File System)A peer-to-peer protocol for storing and addressing files by their content hash rather than location. Widely used to host NFT metadata and decentralized website content.
- IPO (Initial Public Offering)The process by which a private company sells shares to the public for the first time, listing on a stock exchange. IPOs raise capital and provide liquidity to early investors and employees.
- IRA (Individual Retirement Account)A US tax-advantaged retirement account that an individual opens independently of an employer. The two main types are Traditional (tax-deferred) and Roth (tax-free withdrawals in retirement).
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15 terms- Layer 1A base blockchain that handles its own consensus and security — Bitcoin, Ethereum, Solana, Avalanche. Layer 1s are the foundation on which Layer 2s and applications are built.
- Layer 2A scaling network that runs on top of a Layer 1 (typically Ethereum), processing transactions off-chain and posting back compressed proofs or data. Examples: Arbitrum, Optimism, Base, zkSync.
- Lending ProtocolA DeFi application that lets users supply assets to earn yield and borrow against collateral. Interest rates are set algorithmically by utilization. Major protocols include Aave, Compound, and Morpho.
- LeverageUsing borrowed money to amplify the size of an investment or trade. Leverage magnifies both gains and losses, and is a core source of risk in margin trading and corporate finance.
- LiabilityA financial obligation owed to another party — a loan, accounts payable, taxes due, or future commitments. Liabilities sit on the right side of the balance sheet, opposite assets.
- LidoThe largest liquid-staking protocol on Ethereum. Users stake ETH through Lido and receive stETH, a liquid token representing their stake plus accumulated rewards, usable across DeFi.
- Light NodeA blockchain client that downloads only block headers and verifies a small subset of data, relying on full nodes for the rest. Lightweight enough to run on phones and embedded devices.
- Limit OrderAn order to buy or sell an asset at a specified price or better. Limit orders give price control but are not guaranteed to execute if the market never reaches the limit.
- Liquid Restaking Token (LRT)A liquid token representing a position in an EigenLayer restaking protocol. LRTs earn restaking rewards while remaining usable as collateral or trading assets across DeFi.
- Liquid StakingStaking crypto through a protocol that issues a liquid receipt token in return. The receipt earns staking rewards and can be traded or used as DeFi collateral, avoiding the lockup of native staking.
- LiquidityThe ease with which an asset can be converted to cash without significantly affecting its price. Cash is the most liquid asset; real estate and private equity are among the least liquid.
- Liquidity PoolA smart-contract reserve of two or more tokens that enables AMM trading. Liquidity providers deposit pairs in proportion to current prices and earn a share of trading fees.
- Liquidity Provider (LP)A user who deposits assets into a liquidity pool to facilitate AMM trading, earning fees and sometimes token incentives. LPs bear impermanent loss when pool prices diverge.
- LoanA sum of money lent to a borrower with an obligation to repay the principal plus interest over time. Loans can be secured by collateral or unsecured, fixed-rate or variable-rate.
- Long PositionOwning an asset with the expectation that its price will rise. Profit equals the price increase minus any financing or transaction costs. The default direction for most retail investing.
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28 terms- MacroeconomicsThe branch of economics that studies aggregate phenomena: GDP, inflation, unemployment, interest rates, trade balances. Macro analysis informs monetary and fiscal policy decisions.
- MainnetThe live, production blockchain network where real assets are transacted. Distinguished from testnets, which use valueless tokens for development and experimentation.
- MakerDAOA decentralized protocol on Ethereum that issues DAI, a crypto-collateralized stablecoin pegged to the US dollar. Users mint DAI by locking collateral in vaults; governance is run via the MKR token.
- MarginBorrowing funds from a broker to buy securities, using existing positions as collateral. Margin amplifies returns but exposes the trader to forced liquidation if the position moves against them.
- Market CapitalizationA company’s total equity value: share price multiplied by shares outstanding. In crypto, market cap is token price times circulating supply, used to size and rank assets.
- Market OrderAn order to buy or sell an asset immediately at the best available current price. Market orders guarantee execution but not price, and can suffer slippage in illiquid or fast-moving markets.
- MaturityThe date on which a bond, CD, or other debt instrument repays its principal in full. Maturities range from overnight to 30+ years; longer maturities generally pay higher yields.
- Max SupplyThe maximum number of coins or tokens that will ever exist for a given cryptocurrency. Bitcoin caps at 21 million; some assets, like ETH post-Merge, have no fixed cap.
- MemecoinA cryptocurrency whose value is driven primarily by community, humor, and viral attention rather than utility — Dogecoin, Shiba Inu, Pepe. A core driver of speculative cycles and a major use case for Solana and Base.
- MetadataOff-chain or on-chain data describing the properties of a token or NFT — image, traits, name, description. NFT metadata is typically stored on IPFS or Arweave and referenced by URI from the contract.
- MetaverseA persistent, shared virtual environment combining 3D worlds, social interaction, and digital ownership. In crypto, metaverse projects often use NFTs to represent land, avatars, and in-world items.
- MEV (Maximal Extractable Value)Profit a block producer can capture by reordering, including, or censoring transactions within a block. MEV strategies include arbitrage, liquidations, and sandwich attacks.
- MicroeconomicsThe branch of economics that studies individual decision-making by households and firms — supply, demand, pricing, incentives. Micro provides the building blocks for macroeconomic models.
- MinerA participant in a proof-of-work blockchain who runs hardware to compete for the right to add the next block, earning block rewards and transaction fees in return.
- MiningThe process by which proof-of-work blockchains add new blocks: miners compete to find a hash below a target value, expending energy in exchange for newly issued coins and fees.
- Mining DifficultyA protocol parameter controlling how hard it is to mine the next block. Bitcoin adjusts difficulty every 2,016 blocks to keep average block time near 10 minutes regardless of total hash rate.
- Mining PoolA group of miners that combine hash power and share block rewards proportionally to their contributions. Pools smooth income for individual miners who could rarely find a block solo.
- MintCreating a new token or NFT and recording it on a blockchain. Minting can be open to the public, restricted by an allowlist, or programmatic via a smart contract.
- Mnemonic PhraseA 12 or 24-word sequence (per BIP-39) that encodes a wallet’s master seed. Anyone with the phrase has full control of the wallet, so it must be backed up offline and never shared.
- Modular BlockchainAn architecture that separates blockchain functions — execution, settlement, consensus, data availability — across specialized layers. Contrasts with monolithic chains that handle all functions in one stack.
- MonadA high-performance EVM-compatible Layer 1 designed for parallel execution and pipelined consensus, targeting tens of thousands of transactions per second while preserving Ethereum compatibility.
- MoneroA privacy-focused cryptocurrency that obscures sender, receiver, and amount through ring signatures, stealth addresses, and confidential transactions. The leading privacy coin by adoption.
- Monetary PolicyA central bank’s actions to manage the money supply and interest rates to influence inflation, employment, and growth. Tools include policy rates, reserve requirements, and asset purchases.
- Money Market AccountA bank account that combines features of savings and checking — usually higher interest, limited check writing, and a higher minimum balance. Insured by the FDIC up to standard limits.
- MortgageA loan used to purchase real estate, secured by the property itself. Repaid in monthly installments of principal and interest over terms typically ranging from 15 to 30 years.
- MultisigA wallet that requires multiple signatures to authorize a transaction (e.g., 2-of-3 or 4-of-7). Used by DAOs and institutions to remove single points of failure in custody.
- Municipal BondA debt security issued by a US state, city, or local authority to finance public projects. Interest is typically exempt from federal income tax and sometimes from state and local taxes as well.
- Mutual FundA pooled investment vehicle that holds a diversified portfolio of securities managed by a professional manager. Priced once daily at net asset value, with various fee structures and strategies.
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9 terms- NASDAQA US stock exchange known for its concentration of technology and growth companies. The Nasdaq Composite Index tracks all stocks listed on the exchange.
- Net IncomeA company’s profit after subtracting all expenses, interest, taxes, and other costs from revenue. Also called the bottom line, net income drives EPS and is the basis for many valuation ratios.
- Net PayAn employee’s take-home pay after all taxes, retirement contributions, insurance premiums, and other deductions are subtracted from gross pay.
- Net Present Value (NPV)The present-day value of expected future cash flows from an investment, discounted at a required rate of return. A positive NPV indicates the investment is expected to add value.
- Net WorthTotal assets minus total liabilities. The single best snapshot of a person’s or household’s financial position, tracked over time to gauge progress toward goals.
- NFT (Non-Fungible Token)A unique, non-interchangeable token recorded on a blockchain. Used to represent ownership of digital art, collectibles, in-game items, identity, and increasingly real-world assets.
- NodeAny computer that participates in a blockchain network by storing and propagating data. Nodes can be full (verifying everything), light (verifying headers), or specialized (e.g., archive, validator).
- Non-Custodial WalletA crypto wallet where the user controls the private keys directly. Examples include MetaMask, Rabby, and most hardware wallets. Self-custody removes counterparty risk but shifts security to the user.
- NYSEThe New York Stock Exchange, the world’s largest stock exchange by market capitalization. Home to many of the oldest and largest US companies, with a hybrid floor-and-electronic trading model.
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12 terms- Off-Chain GovernanceProtocol decision-making that happens off the blockchain — in forums, calls, signaling votes (e.g., Snapshot) — and is then implemented manually by maintainers or stewards.
- On-Chain GovernanceProtocol governance executed entirely through smart contracts: proposals, votes, and code changes are all enforced on-chain without trusted intermediaries.
- OndoA protocol focused on tokenizing real-world assets like US Treasuries and money-market funds, bringing institutional-grade yield products on-chain. A leading name in the RWA category.
- OpenSeaA long-running NFT marketplace supporting Ethereum and several other chains. OpenSea was the dominant venue during the 2021 NFT boom and remains a major aggregator and creator platform.
- Operating IncomeProfit from a company’s core business operations, calculated as gross profit minus operating expenses (excluding interest and taxes). A clean view of operational performance.
- OptimismAn Ethereum Layer 2 using optimistic rollup technology. Optimism developed the OP Stack — the modular framework underlying Base, World Chain, and other chains in the broader "Superchain" vision.
- Optimistic RollupA Layer 2 design that assumes transactions are valid by default and allows challengers to submit fraud proofs during a withdrawal window. Used by Arbitrum, Optimism, and Base.
- OptionsDerivative contracts that grant the right, but not the obligation, to buy (call) or sell (put) an underlying asset at a strike price before expiration. Used for speculation, hedging, and income.
- OracleA service that brings off-chain data — prices, weather, sports results — onto a blockchain so smart contracts can act on it. Chainlink is the dominant general-purpose oracle network.
- Order BookA real-time list of all open buy and sell orders for an asset, organized by price level. Order books drive matching on traditional exchanges and a growing number of on-chain DEXes.
- Over-CollateralizationPosting more collateral than the value of the loan or stablecoin being issued, providing a buffer against price volatility. Standard practice in DeFi lending and CDP-based stablecoins.
- OverdraftA balance below zero in a bank account, typically incurred when a withdrawal or charge exceeds available funds. Banks usually charge fees and may offer overdraft protection or short-term credit.
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29 terms- PendleA DeFi protocol that splits yield-bearing tokens into separate principal and yield components, letting users trade future yield, lock fixed rates, or speculate on rate movements.
- PensionAn employer-funded retirement plan that pays a defined benefit in retirement, typically based on salary and years of service. Largely replaced in the private sector by 401(k)s and similar plans.
- Perpetuals (Perps)Crypto derivative contracts that mimic spot exposure with leverage but never expire. Funding payments between longs and shorts keep the price tethered to spot. The dominant trading product on most crypto exchanges.
- PFP (Profile Picture)An NFT designed to be used as an avatar, signaling community membership. CryptoPunks and Bored Ape Yacht Club popularized the format, which spawned thousands of imitator collections.
- PhishingA social-engineering attack that tricks users into revealing private keys, signing malicious transactions, or visiting fraudulent sites. The leading cause of crypto theft from individuals.
- Play-to-Earn (P2E)A game model in which players earn tokens or NFTs through gameplay, which can be sold for real money. Pioneered by Axie Infinity and now evolving toward "play-and-earn" with stronger gameplay loops.
- Points / Points FarmingA pre-token loyalty program where protocols award off-chain points to early users in anticipation of an airdrop. "Points farming" refers to optimizing on-chain behavior to maximize point accrual.
- PolkadotA multi-chain network founded by Ethereum co-founder Gavin Wood. Its relay chain provides shared security to a set of parallel blockchains called parachains, enabling specialized chains to interoperate.
- PolygonAn ecosystem of Ethereum-aligned scaling solutions, including the popular PoS sidechain and the zkEVM rollup. Widely used by enterprises and consumer apps for low-cost transactions.
- PortfolioA collection of financial assets held by an individual or institution — stocks, bonds, cash, real estate, alternatives. Portfolio construction balances risk, return, and liquidity needs.
- Position TradingA long-term trading style that holds positions for weeks, months, or years to capture major price trends. Closer to investing than to active trading, with less time spent in front of charts.
- PPI (Producer Price Index)A measure of the average change over time in selling prices received by domestic producers for their output. PPI is a leading indicator of consumer inflation, since producer costs eventually pass through.
- Preferred StockA class of stock that pays fixed dividends and ranks ahead of common stock in liquidation, but typically has no voting rights. Sits between common equity and bonds in the capital structure.
- PremiumIn insurance, the recurring payment that keeps a policy in force. In options, the upfront price paid by the buyer to the seller for the contract. In bonds, the amount paid above face value.
- Price-to-Earnings Ratio (P/E)A valuation multiple equal to share price divided by earnings per share. The P/E indicates how much investors are paying per dollar of profit, useful for comparing companies within an industry.
- Prime RateThe interest rate that US commercial banks charge their most creditworthy customers, used as a benchmark for many consumer loans, including credit cards and HELOCs. Tied to the federal funds rate.
- PrincipalThe original amount of money invested or borrowed, before interest or returns. In a loan, principal is the balance still owed; in an investment, it is the initial contribution.
- Privacy CoinA cryptocurrency designed to obscure transaction details — sender, receiver, amount — using cryptographic techniques. Examples include Monero (ring signatures) and Zcash (zk-SNARKs).
- Private EquityInvestment in companies that are not publicly traded, often through buyouts or growth-stage capital. Private-equity funds typically use leverage and aim to exit through sale or IPO over several years.
- Private KeyA secret cryptographic value that authorizes spending from a wallet. Anyone with the private key controls the funds, which is why it must be kept offline and never shared.
- ProfitThe financial gain remaining after subtracting all costs from revenue. Profit comes in several layers — gross, operating, and net — each providing a different view of business performance.
- Proof of History (PoH)A cryptographic clock used by Solana to order transactions before consensus, enabling validators to process blocks in parallel. PoH is one of the primary innovations behind Solana’s throughput.
- Proof of Stake (PoS)A consensus mechanism in which validators are chosen to propose blocks based on the amount of cryptocurrency they have staked. PoS is far more energy-efficient than proof of work.
- Proof of Work (PoW)The original blockchain consensus mechanism, in which miners compete to solve a computational puzzle to add the next block. Energy-intensive but battle-tested; secures Bitcoin.
- Property TaxAn annual tax levied by local governments on the assessed value of real estate. Rates and assessment methods vary widely by jurisdiction; revenue typically funds schools and local services.
- Public KeyA cryptographic value derived from a private key that can be safely shared. In crypto, public keys are used to derive wallet addresses and to verify signatures created by the corresponding private key.
- Pump and DumpA coordinated scheme where insiders inflate an asset’s price through hype and coordinated buying, then sell into the demand they created. Illegal in regulated markets and rampant in low-cap crypto.
- Pump.funA Solana-based platform that lets anyone launch a memecoin in seconds with a bonding-curve mechanism. Became the epicenter of the 2024–25 memecoin cycle and a major source of Solana network activity.
- Put OptionA contract giving the holder the right, but not the obligation, to sell an underlying asset at a set strike price before a given expiration date. Used to speculate on or hedge against price declines.
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2 terms- Quadratic VotingA voting mechanism where the cost of casting additional votes on a single issue grows quadratically. Designed to express intensity of preference while limiting whale dominance in DAO governance.
- Quantitative EasingA monetary-policy tool in which a central bank buys long-dated assets to inject liquidity, lower long-term rates, and stimulate the economy. Used heavily after the 2008 crisis and during COVID.
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17 terms- RecessionA significant decline in economic activity lasting more than a few months, typically marked by falling GDP, rising unemployment, and lower consumption and investment. Conventionally signaled by two consecutive quarters of GDP contraction.
- Reentrancy AttackA smart-contract exploit where a malicious contract repeatedly calls back into a vulnerable function before its state is updated, draining funds. The famous DAO hack of 2016 used this technique.
- RefinanceReplacing an existing loan with a new one, typically to secure a lower interest rate, change the term, or tap equity. Most commonly applied to mortgages but possible for any debt.
- RestakingReusing already-staked ETH (or its liquid receipt) to secure additional protocols, earning extra rewards in exchange for accepting additional slashing risk. Pioneered by EigenLayer.
- Return on Assets (ROA)A profitability ratio calculated as net income divided by total assets. ROA shows how efficiently a company generates profit from its asset base, useful for comparing capital intensity.
- Return on Equity (ROE)A profitability ratio calculated as net income divided by shareholder equity. ROE shows how effectively a company turns shareholder capital into profit; consistently high ROE is a hallmark of quality businesses.
- Return on Investment (ROI)A simple performance ratio: gain (or loss) on an investment divided by its cost, expressed as a percentage. Easy to compute but ignores time horizon and risk.
- RevenueThe total income a business generates from its primary activities — selling goods and services — before any expenses are deducted. Also called the top line.
- Reverse MortgageA loan available to homeowners 62 and older that converts home equity into cash, with no monthly payments required. The loan is repaid when the borrower sells, moves out, or passes away.
- Risk ToleranceAn investor’s willingness and ability to absorb losses in pursuit of higher returns. Risk tolerance shapes asset allocation and depends on time horizon, income stability, and emotional disposition.
- RollupA Layer 2 scaling approach that executes transactions off-chain and posts compressed data and proofs back to a Layer 1. The two main types are optimistic rollups and ZK-rollups.
- Roth IRAA US individual retirement account funded with after-tax dollars. Contributions and earnings can be withdrawn tax-free in retirement, making Roth IRAs especially valuable for those expecting higher future tax rates.
- Routing NumberA nine-digit code identifying a US bank or credit union for ACH transfers, wire transfers, and check processing. Routing numbers are paired with the account number to direct funds correctly.
- RoyaltiesA percentage of secondary NFT sales paid back to the original creator. Once enforced by marketplaces, on-chain royalties became optional in 2023 amid competition between OpenSea, Blur, and others.
- Rug PullA scam where developers abandon a project and run off with investor funds — typically by draining liquidity, dumping tokens, or disabling withdrawals. A common risk in unaudited DeFi launches.
- Russell 2000A US stock index tracking around 2,000 small-cap companies. Often used as a benchmark for small-cap performance and a barometer of domestic economic health.
- RWA (Real World Assets)On-chain representations of off-chain assets — Treasuries, real estate, private credit, commodities. RWAs bring traditional yield and collateral types into DeFi, with leaders including Ondo and BlackRock’s BUIDL.
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48 terms- S&P 500A market-cap-weighted index of 500 large US companies, considered the benchmark for US equity performance. Most retirement portfolios are anchored to S&P 500 index funds.
- Sandwich AttackAn MEV strategy where a bot front-runs a victim’s trade by buying first, lets the victim’s trade push the price, then sells immediately after. Common on AMMs without slippage protection.
- Satoshi (Unit)The smallest unit of Bitcoin, equal to 0.00000001 BTC (one hundred-millionth of a bitcoin). Named after Satoshi Nakamoto, it allows microtransactions even when one BTC is worth tens of thousands of dollars.
- Satoshi NakamotoThe pseudonymous creator of Bitcoin, who published its whitepaper in 2008 and disappeared in 2011. Their identity has never been confirmed, and their estimated 1M BTC has never moved.
- Savings AccountA bank account that holds funds while paying interest, with limited transaction frequency. Suited for emergency funds and short-term goals; high-yield savings accounts pay meaningfully more than traditional ones.
- Sector RotationAn investment strategy that shifts capital between economic sectors based on the business cycle. For example, moving toward consumer staples in a downturn and into technology and industrials during expansion.
- Security TokenA blockchain-based token representing ownership of a regulated security — equity, debt, or fund shares. Subject to securities laws and traditionally requiring KYC and accredited-investor status.
- Seed PhraseA human-readable backup of a wallet’s master key, typically 12 or 24 words drawn from the BIP-39 wordlist. Anyone with the seed phrase can recover the wallet, so it must be stored offline and never digitized.
- Self-Sovereign IdentityAn identity model where individuals control their own credentials and data, presenting verifiable proofs without relying on a central issuer. Often built on decentralized identifiers (DIDs) and verifiable credentials.
- SequencerThe component of a Layer 2 rollup that orders transactions and produces blocks. Most rollups currently run a single sequencer; decentralizing the sequencer is an active area of research.
- SHA-256A cryptographic hash function in the SHA-2 family that produces a 256-bit output. SHA-256 underpins Bitcoin mining and many other security-critical systems.
- ShardingA scaling technique that splits a blockchain into smaller pieces (shards) that process transactions in parallel. Used by Near and on Ethereum’s long-term roadmap (originally as data sharding for rollups).
- ShareA single unit of equity ownership in a company. Owning shares entitles the holder to a proportional claim on assets and earnings, and often voting rights at shareholder meetings.
- Share BuybackA company repurchasing its own outstanding shares from the market, reducing share count and boosting per-share metrics like EPS. An alternative to dividends for returning capital to shareholders.
- Sharpe RatioA measure of risk-adjusted return, calculated as excess return over the risk-free rate divided by standard deviation. Higher is better; the Sharpe ratio lets investors compare strategies on equal footing.
- Short PositionA bet that an asset’s price will decline, usually established by short selling — borrowing shares, selling them, and buying them back later to return. Short positions have unlimited theoretical loss.
- Short SellingBorrowing an asset and selling it, planning to repurchase it later at a lower price to return to the lender, pocketing the difference. A way to profit from declines or to hedge other holdings.
- SidechainAn independent blockchain that runs alongside a main chain, with its own consensus and a two-way bridge for moving assets. Sidechains trade reduced security for higher throughput or specialized features.
- Simple InterestInterest calculated only on the original principal, not on accumulated interest. Common in short-term loans and some auto loans. Always less than compound interest for the same nominal rate and period.
- SlashingA penalty in proof-of-stake networks where part of a validator’s stake is destroyed for misbehavior such as double-signing or extended downtime. A core security mechanism enforcing honest participation.
- SlippageThe difference between the expected price of a trade and the price at which it actually executes. Common on AMMs and in fast-moving or illiquid markets; users typically set a maximum slippage tolerance.
- Smart ContractSelf-executing code deployed on a blockchain that runs automatically when specific conditions are met. Smart contracts power everything from token transfers to complex DeFi protocols.
- Smart Contract AuditA formal review of a smart contract’s code by security specialists to identify vulnerabilities before launch. Audits reduce but do not eliminate risk; even audited contracts have been exploited.
- SnapshotA widely used off-chain governance platform where DAOs hold gasless, signature-based votes weighted by token balances at a chosen block. Vote results are then implemented on-chain by trusted executors.
- Social SecurityA US government program that provides retirement, disability, and survivor benefits, funded by payroll taxes. Benefits are based on lifetime earnings and the age at which an individual claims them.
- SocialFiSocial applications that integrate crypto economics — token-gated communities, monetized content, on-chain reputation. Friend.tech, Farcaster, and Lens are leading examples of the SocialFi category.
- Soft ForkA backward-compatible blockchain upgrade where new rules are stricter than old ones. Non-upgraded nodes still recognize new blocks as valid, avoiding a chain split.
- Soft LandingA scenario in which a central bank tightens monetary policy enough to bring inflation down without triggering a recession. Rare in practice and the goal most policymakers aim for during hiking cycles.
- Software WalletA crypto wallet implemented as an application — desktop, mobile, or browser extension — with private keys stored on the user’s device. More convenient than hardware wallets but more exposed to malware.
- SolanaA high-throughput Layer 1 known for fast finality and low fees, powered by Proof of History combined with Proof of Stake. Home to a thriving DeFi, NFT, and memecoin ecosystem.
- SolidityThe dominant programming language for writing smart contracts on Ethereum and other EVM-compatible chains. Solidity is statically typed, contract-oriented, and compiled to EVM bytecode.
- Soulbound Token (SBT)A non-transferable token bound to a single wallet, used to represent credentials, achievements, or identity attributes. The concept was popularized by Vitalik Buterin in a 2022 paper on decentralized society.
- StablecoinA cryptocurrency designed to maintain a stable value, usually pegged to a fiat currency like the US dollar. Major types include fiat-backed (USDC, USDT), crypto-collateralized (DAI), and algorithmic.
- StagflationAn economic environment combining stagnant growth, high unemployment, and rising inflation. Stagflation is especially difficult for policymakers because the standard tools for fighting one problem worsen the other.
- StakingLocking up cryptocurrency to help secure a proof-of-stake network and earning rewards in return. Staking can be done directly by running a validator or delegated through a pool or liquid-staking protocol.
- Standard DeductionA fixed amount that US taxpayers can subtract from their adjusted gross income instead of itemizing deductions. Most filers take the standard deduction since it is larger than their itemized total.
- STO (Security Token Offering)A regulated token sale where the issued tokens qualify as securities and comply with applicable laws. STOs target accredited investors and aim to bring institutional-grade compliance to token fundraising.
- StockA security representing partial ownership in a company. Each share entitles the holder to a proportional claim on assets and earnings, with prices set by buyers and sellers on stock exchanges.
- Stock ExchangeA regulated marketplace where securities are bought and sold. Major exchanges (NYSE, Nasdaq, LSE) provide listing standards, matching infrastructure, and oversight that support deep liquidity.
- Stock SplitA corporate action that increases the number of shares outstanding while proportionally lowering the price per share. A 2-for-1 split doubles the share count but does not change overall market cap.
- Stop-Loss OrderAn order that automatically sells a position once its price falls to a specified level, limiting potential losses. Useful for risk management but vulnerable to gap moves and short-term volatility.
- Strike PriceThe fixed price at which an option contract can be exercised — bought (call) or sold (put). Strike price relative to market price determines whether an option is in, at, or out of the money.
- Student LoanA loan used to pay for post-secondary education, with relatively favorable terms and repayment options. Federal student loans typically offer lower rates and more flexibility than private alternatives.
- SuiA Layer 1 blockchain built by ex-Meta engineers using the Move language. Sui’s object-centric data model enables parallel transaction execution and very low latency for consumer applications.
- Supply and DemandThe economic principle that prices are set by the interaction between how much of something is available and how much buyers want at a given price. The foundation of market pricing.
- Swing TradingA trading style that holds positions for several days to a few weeks, aiming to capture medium-term price swings. Less time-intensive than day trading, but still active relative to long-term investing.
- Sybil AttackAn attack in which a single actor creates many fake identities to gain disproportionate influence over a network — for example, in airdrops, governance votes, or peer-to-peer routing.
- Synthetic AssetA tokenized derivative that tracks the price of another asset — a stock, commodity, or currency — without requiring direct ownership. Backed by collateral and price oracles.
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19 terms- TariffA tax imposed by a government on imported goods, used to raise revenue or protect domestic industries. Tariffs raise prices for buyers and often invite retaliation in trade disputes.
- Tax BracketA range of income taxed at a specific marginal rate under a progressive income-tax system. Earning into a higher bracket only taxes the additional income at the higher rate, not the entire income.
- Tax CreditA dollar-for-dollar reduction in the tax owed, more valuable than a deduction of the same amount. Some credits are refundable, paying out even if they exceed the tax liability.
- Tax DeductionAn amount subtracted from gross income to lower taxable income, reducing the tax owed by the deduction amount times the marginal rate. Includes mortgage interest, charitable gifts, and others.
- Tax-Loss HarvestingSelling investments at a loss to offset capital gains and reduce taxable income, while typically reinvesting in similar (but not "substantially identical") assets to preserve market exposure.
- Term Life InsuranceA life-insurance policy that pays a death benefit if the insured dies within a fixed term (e.g., 20 years). Cheaper than permanent insurance and the right fit for most income-replacement needs.
- TestnetA blockchain network that mirrors the live mainnet but uses valueless tokens, allowing developers to deploy and test smart contracts without risking real funds. Each major chain has one or more testnets.
- TokenA digital asset issued on top of an existing blockchain (commonly Ethereum), as opposed to a coin native to its own chain. Tokens can represent currency, governance rights, NFTs, or arbitrary value.
- Token BurnA transaction that permanently removes tokens from circulation by sending them to an unspendable address. Burns can be one-off events or programmatic (e.g., EIP-1559 burns part of every Ethereum gas fee).
- Token UnlockA scheduled release of tokens from a vesting contract to team members, investors, or the treasury. Unlocks add to circulating supply and are watched closely as potential sell pressure.
- TokenomicsThe economic design of a crypto token — supply schedule, distribution, utility, value capture, governance. Strong tokenomics align incentives between users, builders, investors, and the protocol itself.
- TON (The Open Network)A Layer 1 blockchain originally designed by Telegram and now developed by an independent foundation. Tightly integrated with Telegram, TON has driven major waves of consumer crypto adoption via mini-apps.
- Total SupplyThe total number of tokens that currently exist for a given cryptocurrency, including locked and reserved tokens but excluding any that have been burned. Different from circulating and max supply.
- Total Value Locked (TVL)The aggregate dollar value of crypto deposited in a DeFi protocol or chain. TVL is the most common headline metric for DeFi adoption, though it can be inflated by recursive lending.
- Trade DeficitA negative balance of trade in which a country imports more goods and services than it exports. Trade deficits are not inherently bad and often coexist with strong domestic demand.
- Trade SurplusA positive balance of trade in which a country exports more goods and services than it imports. Persistent surpluses can build foreign-currency reserves but may invite political friction.
- Traditional IRAA US individual retirement account funded with pre-tax dollars (subject to income limits). Contributions reduce current taxable income; withdrawals in retirement are taxed as ordinary income.
- TransactionA signed instruction broadcast to a blockchain that transfers value or invokes smart-contract code. Once included in a block and confirmed, transactions become a permanent part of the chain’s history.
- Treasury BondA long-term debt security issued by the US Treasury, with maturities of 20 or 30 years and fixed semiannual coupons. Treasuries are considered the global benchmark for risk-free interest rates.
U
3 terms- Unemployment RateThe percentage of the labor force that is jobless and actively looking for work. Reported monthly, it is a headline indicator of labor-market health and a major input into central-bank decisions.
- UniswapThe largest decentralized exchange by volume, pioneer of the constant-product AMM model. Now spanning Ethereum and major Layer 2s, with v4 introducing customizable "hooks" for pool behavior.
- Utility TokenA token that provides access to a specific product or service within a network — paying for storage, compute, bandwidth, or in-app actions. Distinct from governance and security tokens.
V
6 terms- ValidatorA node in a proof-of-stake network that proposes and attests to new blocks, securing the chain in exchange for staking rewards. Misbehavior can result in slashing of the validator’s stake.
- Value StockShares of a company trading at a low price relative to fundamentals like earnings, book value, or cash flow. Value investors believe the market has temporarily undervalued the business.
- VaultA smart contract that pools user deposits and runs an automated strategy on their behalf — yield aggregation, leveraged staking, structured products. Yearn popularized the model.
- Venture CapitalInvestment in early-stage, high-growth-potential companies in exchange for equity. VC funds accept high failure rates in pursuit of outsized returns from a small number of breakout winners.
- VestingA schedule that determines when a person earns full ownership of granted assets — equity, retirement contributions, or crypto tokens. Vesting aligns long-term incentives between recipients and the granting entity.
- VolatilityThe degree to which an asset’s price fluctuates over time, typically measured as the standard deviation of returns. High volatility means larger swings in either direction and is a primary measure of risk.
W
13 terms- W-2A US tax form issued by employers to employees each year, reporting annual wages and the taxes withheld from paychecks. Used to file individual income-tax returns.
- WalletSoftware or hardware that stores cryptographic keys and lets users send, receive, and interact with crypto assets. Wallets do not actually hold tokens — they hold the keys that control them on-chain.
- Wallet AddressA public identifier derived from a wallet’s public key, used to receive cryptocurrency. Addresses are safe to share publicly; only the corresponding private key can authorize spending from them.
- Web2The dominant model of the modern internet, characterized by user-generated content hosted on centralized platforms (Google, Meta, Twitter) that own data and capture most of the value.
- Web3A vision of the internet built on decentralized blockchains, where users own their data, identity, and the assets they create. The umbrella term for crypto-powered applications and infrastructure.
- WeiThe smallest unit of Ether, equal to 10⁻¹⁸ ETH. All EVM calculations are denominated in wei to avoid floating-point math; gas prices are typically expressed in gwei (one billion wei).
- WhaleA holder of an unusually large amount of a particular cryptocurrency, capable of moving the market with a single trade. On-chain analytics tools track whale wallets for early signals.
- WhitepaperA document outlining the vision, design, and technical details of a crypto project. Bitcoin’s 2008 whitepaper, "A Peer-to-Peer Electronic Cash System," set the template for the format.
- Whole Life InsuranceA permanent life-insurance policy that lasts for the insured’s entire life and accumulates a cash-value component. More expensive than term insurance and rarely the right fit for pure income protection.
- Wire TransferAn electronic transfer of funds between banks, typically settling the same day. Wires are faster but more expensive than ACH transfers and are the standard for large or time-sensitive payments.
- WithholdingMoney an employer deducts from each paycheck and remits to tax authorities on the employee’s behalf. The amount aims to approximate the year-end tax liability, with any over- or under-payment settled at filing.
- Working CapitalA measure of a company’s short-term liquidity: current assets minus current liabilities. Positive working capital indicates the business can cover near-term obligations; negative may signal financial stress.
- Wrapped TokenA token on one blockchain that represents an asset native to another, locked one-to-one in a custodian or bridge contract. Examples include WBTC (Bitcoin on Ethereum) and wstETH.
Y
4 terms- YieldThe income return on an investment, expressed as a percentage of cost or current value. Bond yields, dividend yields, and DeFi yields all describe how much income an asset generates relative to its price.
- Yield AggregatorA DeFi protocol that automatically routes user deposits across multiple yield sources to maximize returns. Yearn pioneered the category; Beefy, Convex, and others have extended it.
- Yield CurveA plot of bond yields against maturities, typically using government bonds. The shape of the curve — normal, flat, or inverted — provides clues about growth and inflation expectations.
- Yield FarmingActively rotating crypto assets across DeFi protocols to maximize returns from interest, trading fees, and token incentives. Once dominant, the practice has matured into more sustainable strategies.
Z
3 terms- ZcashA privacy-focused cryptocurrency that uses zk-SNARKs to allow shielded transactions where sender, receiver, and amount are hidden. Users can opt between transparent and shielded addresses.
- Zero-Knowledge Proof (ZKP)A cryptographic method that lets one party prove they know a value (or that a statement is true) without revealing the underlying data. The foundation of ZK-rollups and modern privacy systems.
- ZK-RollupA Layer 2 scaling solution that uses zero-knowledge proofs to validate batches of transactions off-chain and post a compact proof to the Layer 1. Examples: zkSync, Starknet, Polygon zkEVM, Linea.