Corporate Bond

How they work

A corporation issues debt by selling bonds to investors at par (typically $1,000 face value), with a stated coupon rate and maturity date. The company pays semi-annual coupon interest and returns the face value at maturity. Default risk varies by company; that risk shows up as a higher yield than equivalent-maturity Treasuries.

The "credit spread" — the gap between a corporate bond's yield and a same-maturity Treasury — is a real-time indicator of perceived corporate credit risk. Tight spreads mean investors don't fear defaults; wide spreads (often hundreds of basis points) mean stress.

Investment grade vs. high yield

Corporate bonds are split by credit rating:

• Investment grade — rated BBB-/Baa3 or higher. Issued by financially solid companies. Default rates historically low — under 0.5% annually for BBB. Yields modestly above Treasuries.
• High yield (junk) — rated BB+/Ba1 or lower. Higher default risk; default rates can run 2–4% annually historically and higher in stress periods. Yields several hundred basis points above Treasuries to compensate.

The two segments behave differently in market stress. High-yield spreads blow out during recessions (2008 saw spreads above 2,000 bps); investment grade widens but less violently. Many institutional investors are restricted to investment grade by mandate, creating mechanical buyers and stable demand for that segment.

Why companies issue bonds

A few common reasons:

• Lower cost than equity. Interest is tax-deductible; dividends aren't. For mature, profitable companies, debt is cheaper capital than issuing more shares.
• Lock in long-term funding. A 10-year bond gives certainty of capital for a decade; a bank loan or commercial paper requires constant rolling.
• Specific use cases. Project finance, M&A, refinancing existing debt, share buybacks (controversially).
• Maintaining ownership structure. Issuing bonds doesn't dilute existing shareholders. Equity issuance does.

The optimal capital structure is the subject of decades of corporate-finance theory; the practical answer is "company-specific," determined by tax considerations, business volatility, growth plans, and investor expectations.

How investors hold them

Most retail investors hold corporate bonds through funds rather than directly:

• Investment-grade ETFs — LQD (iShares iBoxx Investment Grade), VCIT (Vanguard Intermediate-Term Corporate). Diversified portfolios of hundreds of issuers.
• High-yield ETFs — HYG, JNK. Higher yield, higher risk, more correlated with equities than with safer bonds.
• Active mutual funds — managers who buy specific issues, attempting to add value through selection. Mixed historical record vs. passive benchmarks.

Direct ownership of individual corporate bonds is more common at higher wealth levels — typically $250K+ in a fixed-income allocation makes individual bonds reasonable. Below that, the bid-ask spread and minimum trade sizes make funds more practical.

Risks beyond default

Corporate bond holders face several risks:

• Interest rate risk — same as Treasuries. Rising rates push bond prices down; long-duration bonds fall hardest.
• Credit/spread risk — the issuer's perceived creditworthiness can change without default. Spreads can widen, lowering bond prices, even on bonds that ultimately pay in full.
• Liquidity risk — corporate bond markets are dealer-based, not exchange-based. During stress, bid-ask spreads can widen sharply or trading can become difficult.
• Call risk — many corporate bonds are callable, meaning the issuer can redeem them early at a fixed price. If rates fall, issuers refinance and bondholders lose the higher coupon.
• Event risk — M&A, major lawsuits, regulatory changes can change a company's credit profile overnight. Investment-grade bonds can become junk in a single rating action ("fallen angels").

Where corporates fit in a portfolio

Corporate bonds are a middle-ground asset between Treasuries (very safe, lower yield) and equities (high return, high volatility). Investment-grade corporates extend a fixed-income allocation's yield without dramatically increasing risk; high yield behaves more like equity in volatile markets. Many diversified portfolios include all three, with weights tilted by risk tolerance and time horizon.