Inflation-Linked Bonds

What Are Inflation-Linked Bonds?

Inflation-linked bonds are debt securities designed to protect investors from inflation by adjusting their principal and interest payments based on a recognized inflation index. In the United States, these are called Treasury Inflation-Protected Securities (TIPS). Other countries issue similar instruments: UK Index-Linked Gilts, Canadian Real Return Bonds, and Australian Treasury Indexed Bonds.

The principal of an inflation-linked bond increases with the consumer price index. Since coupon payments are calculated as a fixed percentage of the adjusted principal, both components of return grow with inflation. This mechanism ensures that the bondholder's real (inflation-adjusted) return is preserved.

Why It Matters for Markets

Inflation-linked bonds provide critical market information through the breakeven inflation rate, calculated as the difference between nominal Treasury yields and TIPS yields of the same maturity. A 10-year breakeven of 2.5% means the market expects inflation to average 2.5% annually over the next decade. When breakevens rise, it signals increasing inflation expectations, while declining breakevens suggest disinflationary pressures.

Central bankers, policymakers, and traders monitor breakeven rates closely. The Federal Reserve explicitly references market-based inflation expectations, including TIPS breakevens, in its policy deliberations. Sudden shifts in breakevens can move equity markets, currency markets, and the broader bond market.

TIPS also provide a direct reading of real yields, the return investors earn after inflation. Negative real yields (which persisted through much of 2020-2022) indicate that even "safe" government bonds are eroding purchasing power, pushing investors toward riskier assets.

Portfolio Applications

Financial planners often recommend TIPS for retirement portfolios because retirees are particularly vulnerable to inflation eroding their fixed income. TIPS provide a guaranteed real return when held to maturity, making them ideal for long-term purchasing power preservation.

For active traders, TIPS offer a way to express views on inflation relative to market expectations. Going long TIPS and short nominal Treasuries (a "breakeven trade") profits when actual inflation exceeds expectations. This trade is a staple of macro fixed-income strategies and is closely watched as an indicator of the market's inflation conviction.