Bonds: Yield Curve, Credit Risk, Duration & Ladders

The yield curve plots interest rates of bonds with equal credit quality across different maturities. A normal yield curve slopes upward because investors demand higher returns for longer commitments. When short-term rates exceed long-term rates, the curve inverts — a phenomenon that has preceded every US recession since 1970.

The shape of the yield curve reflects market expectations about future interest rates and economic growth. A steepening curve suggests expectations of economic expansion and rising rates, while a flattening curve suggests slowing growth. The Federal Reserve directly controls short-term rates through the federal funds rate, but long-term rates are driven by market forces including inflation expectations and global demand for safe assets.

For investors, the yield curve provides critical context for asset allocation decisions. When the curve is steep, locking in longer-term rates may be attractive. When it inverts, it may signal a shift toward defensive positioning.

Treasury bonds are backed by the full faith and credit of the US government, making them among the safest investments globally. They carry virtually no default risk, which is why they serve as the benchmark for all other bonds. Corporate bonds, issued by companies to raise capital, offer higher yields to compensate investors for additional credit risk.

Corporate bonds are rated by agencies like Moody's and S&P. Investment-grade bonds (BBB/Baa and above) have low default risk and typically yield 0.5-2% above comparable Treasuries. High-yield bonds (below BBB/Baa, often called 'junk bonds') yield significantly more but carry meaningful default risk, especially during recessions.

The spread between corporate and Treasury yields is a key market indicator. Widening spreads signal growing credit concerns and risk aversion. Tightening spreads reflect confidence in the economy and corporate earnings. During the 2008 financial crisis, investment-grade spreads exceeded 6%, compared to a historical average of about 1-1.5%.

Duration measures how sensitive a bond's price is to changes in interest rates. It is expressed in years and represents the weighted average time to receive all cash flows. A bond with a duration of 7 years will lose approximately 7% of its value for every 1% increase in interest rates, and gain 7% for every 1% decrease.

Longer-maturity bonds have higher duration and therefore more interest rate sensitivity. A 30-year Treasury bond might have a duration of 18-20 years, meaning a 1% rate hike could cause an 18-20% price decline. A 2-year note might have a duration of about 1.9 years, making it far less volatile.

Investors can manage duration risk by matching their bond portfolio's duration to their investment horizon. If you need the money in 5 years, a portfolio with a 5-year duration will approximately preserve your purchasing power regardless of rate movements. This principle underlies bond laddering and liability-driven investment strategies.

A bond ladder is a portfolio of bonds with staggered maturities — for example, bonds maturing in 1, 3, 5, 7, and 10 years. As each bond matures, the proceeds are reinvested at the longest rung of the ladder. This strategy provides a balance between yield, liquidity, and interest rate risk management.

The primary advantage is that a ladder smooths out interest rate risk. If rates rise, maturing short-term bonds can be reinvested at higher rates. If rates fall, the longer-dated bonds in the ladder continue earning their original, higher yields. Over time, the average yield converges toward the prevailing market rate without the drama of trying to time rate movements.

Bond ladders also provide regular liquidity. With bonds maturing every 1-2 years, investors have access to funds without selling at potentially unfavorable prices. This makes ladders especially useful for retirees who need predictable income and capital preservation. Treasury bonds, CDs, and investment-grade corporate bonds are all suitable for ladder construction.