Bonds Explained: Why Every Portfolio Needs Them

Bonds are the most misunderstood part of most portfolios. They're not exciting. They don't make headlines. But they might be the reason you don't panic-sell in the next crash.

What Is a Bond?

A bond is a loan. You lend money to a government or corporation, and they pay you back with interest over a set period.

When you buy a U.S. Treasury bond, you're lending money to the U.S. government. When you buy a corporate bond from Apple, you're lending money to Apple. They promise to pay you a fixed interest rate (the coupon) and return your money on a specific date (the maturity date).

Why Own Bonds?

Three reasons:

1. Stability — When stocks crash, bonds typically hold steady or rise. In 2008, while the S&P 500 fell 37%, long-term U.S. Treasuries gained 20%+.
2. Income — Bonds pay regular interest. For retirees or anyone needing cash flow, this is essential.
3. Rebalancing fuel — When stocks drop and bonds rise, you sell bonds to buy cheap stocks. This systematic process improves long-term returns.

Types of Bonds

Government Bonds

U.S. Treasuries are considered the safest investment in the world. The U.S. government has never defaulted. Types include T-bills (short-term), T-notes (2-10 years), and T-bonds (20-30 years).

TIPS (Treasury Inflation-Protected Securities) adjust for inflation. Your principal increases with CPI, protecting your purchasing power.

Corporate Bonds

Loans to companies. Higher yield than Treasuries (because companies can default), but with more risk. Investment-grade bonds (rated BBB or higher) are relatively safe. High-yield ("junk") bonds pay more but carry real default risk.

Municipal Bonds

Loans to state and local governments. The big advantage: interest is often tax-free at federal (and sometimes state) level. Especially valuable for high-income investors.

Bond Risks (Yes, They Exist)

Bonds are safer than stocks — but they're not risk-free:

• Interest Rate Risk — When rates rise, existing bond prices fall. A 1% rate increase can drop long-term bond prices 10-15%. This is why 2022 was brutal for bond holders.
• Inflation Risk — If your bond pays 3% but inflation is 5%, you're losing purchasing power. TIPS address this.
• Credit Risk — The issuer could default. Rare for governments, real for corporations. Diversification via bond funds reduces this.
• Duration Risk — Longer-maturity bonds are more sensitive to rate changes. Short-term bonds are more stable but pay less.

How to Own Bonds (ETFs vs Individual)

Most investors should use bond ETFs rather than buying individual bonds:

• BND — Vanguard Total Bond Market ETF. Broad U.S. bond exposure. The "VTI of bonds."
• AGG — iShares Core U.S. Aggregate Bond. Very similar to BND.
• TLT — iShares 20+ Year Treasury. Long-term government bonds. More volatile, bigger cushion in stock crashes.
• TIPS — iShares TIPS Bond. Inflation-protected Treasuries.
• VGSH — Vanguard Short-Term Treasury. Minimal rate risk.

How Much Should You Own?

The old rule of thumb — "own your age in bonds" — is outdated in a low-rate world, but directionally correct: more bonds as you age.

A more nuanced approach: own enough bonds that you wouldn't panic-sell in a 40% stock crash. If your portfolio is $100K and a $40K drop would ruin your sleep, you need more bonds.