Forex (Foreign Exchange)

How forex markets work

Currencies trade in pairs — buying one means selling another. Major pairs (exchange-rate quotations):

• EUR/USD — Euro vs. US Dollar. The most-traded pair globally.
• USD/JPY — Dollar vs. Japanese Yen.
• GBP/USD — Pound vs. Dollar.
• USD/CHF — Dollar vs. Swiss Franc.
• AUD/USD, USD/CAD, NZD/USD — major commodity-linked currencies vs. dollar.

Cross pairs (currency pairs not involving USD) include EUR/GBP, EUR/JPY, AUD/JPY. Trade volumes are smaller than USD pairs but still significant.

The largest market

Forex's scale dwarfs other financial markets:

• ~$7.5 trillion in average daily volume per the BIS Triennial Survey (2022).
• 24/5 trading — markets operate continuously across Tokyo, London, and New York sessions; weekends are quiet.
• Major participants — central banks, commercial banks, multinational corporations, hedge funds, retail traders.

The size and continuous nature make forex one of the most liquid and efficient markets globally.

Major participants

• Central banks — manage reserves, intervene to influence currency values, conduct monetary policy.
• Commercial banks — provide currency services to clients and trade on their own accounts.
• Corporations — multinationals manage currency risk on receivables, payables, and investment in foreign markets.
• Hedge funds and asset managers — currency speculation and hedging strategies.
• Retail traders — increasingly significant via online platforms.

Most volume is interbank — banks trading with each other. Retail volume is large in absolute terms but small as a share of total.

Currency value drivers

Same factors that drive exchange rates:

• Interest-rate differentials — capital flows toward higher-yielding currencies.
• Inflation differentials — higher inflation tends to weaken a currency.
• Trade flows — surpluses support; deficits weigh.
• Capital flows — investment in/out of a country moves the currency.
• Political stability — instability typically weakens currencies.
• Commodity prices — for commodity exporters' currencies (CAD, AUD, NOK).

Major forex episodes

A few worth knowing:

• Bretton Woods collapse (1971-73) — the post-WWII fixed-rate system ended; major currencies began floating.
• Plaza Accord (1985) — coordinated intervention to weaken the USD against JPY and DEM.
• Black Wednesday (1992) — the UK was forced out of the European Exchange Rate Mechanism after George Soros's famous billion-dollar short on the pound.
• Asian Financial Crisis (1997) — Thai baht devaluation cascaded through several Asian currencies.
• Swiss National Bank shock (January 2015) — SNB unexpectedly removed the EUR/CHF floor; CHF surged 20%+ in minutes; many forex brokers and traders went bankrupt.
• 2022 dollar strength — aggressive Fed hiking sent USD to multi-decade highs against major peers.

Retail forex trading

Retail forex platforms (OANDA, IG, FXCM, IB) offer currency speculation with high leverage — historically up to 500x at offshore brokers, capped at 50x in the US.

The combination of high leverage, 24-hour markets, and macro-driven volatility produces a hostile environment for retail. Studies of retail forex traders consistently find that 70-90% lose money over annual periods, with the long tail much worse.

The brokers' business models often involve being on the opposite side of customer trades — when customers lose, brokers profit. This creates structural conflicts that aren't always disclosed clearly.

Currency hedging in practice

For non-speculative currency exposure:

• Forward contracts — lock in an exchange rate for a future date.
• Currency futures — exchange-traded version.
• Currency options — flexibility with capped cost.
• Currency-hedged ETFs — international equity exposure with currency hedge built in (HEFA, HEDJ, etc.).
• Natural hedging — multinationals match revenues and costs in same currency where possible.

For long-term equity investors, currency hedging adds little value over long horizons (currency volatility averages out, hedging adds cost). For short-horizon and fixed-income exposure, hedging adds more value.

Crypto and forex

Stablecoins increasingly intersect with forex:

• USD stablecoins function as digital dollars; cross-border USDC transfers compete with traditional FX channels for some use cases.
• High-inflation country adoption — citizens of Argentina, Turkey, Lebanon use USDT to hold dollar exposure despite local capital controls.
• Forex-style swaps on DEXes — limited but growing.

These channels remain small compared to traditional forex but represent a meaningful new layer for retail and emerging-market users.

What individuals should care about

For most personal financial planning, forex is mostly background noise:

• Hold most assets in your home currency. Avoiding currency mismatch reduces volatility relative to your spending.
• Allow modest international diversification — some non-home-currency exposure for diversification.
• For specific goals in foreign currency (retirement abroad, foreign property), consider hedging or holding assets in that currency.
• Don't try to forecast FX. Major currencies are extremely hard to predict; even professionals do this poorly.
• Currency-hedged international ETFs exist if you want international stock exposure without the currency component; whether the hedge is worth it depends on goals.

Forex matters most to internationally mobile individuals, multinational businesses, and central bankers. For typical investors, broad portfolio decisions matter more than currency-specific positioning.