Inflation affects bond prices and yields in two connected ways: it shrinks the purchasing power of every fixed coupon payment you collect, and it usually pushes interest rates higher, which drags down the market price of the bonds you already own. The Congressional Budget Office projects a 4.1% yield on 10-year Treasury notes against 2.7% inflation in 2026, leaving about 1.4% in real purchasing power once prices are accounted for.1Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 The gap between what a bond appears to pay and what it actually delivers in spending power is where most investors get tripped up.
Fixed Coupons Lose Purchasing Power
When you buy a bond, the coupon is locked in at a fixed dollar amount for the life of the security. A bond paying $50 a year will pay $50 a year whether a gallon of milk costs $3 or $5. As prices rise, each of those dollars covers less of your actual expenses. The income looks identical on paper and quietly falls behind the cost of living.
Stock dividends can grow as companies raise payouts. Bond coupons cannot. The terms are set at issuance, and nothing short of a restructuring changes them. The longer the bond’s remaining life, the more that slow leak accumulates.
Why Bond Prices Fall When Rates Rise
Higher inflation typically prompts higher benchmark interest rates, and higher rates ripple through the whole bond market because newly issued bonds have to offer better yields to attract buyers. If you own a bond paying 3% and comparable new bonds now pay 5%, no one will buy yours at full price. You would have to sell at a discount deep enough to make the lower coupon competitive with the new yield. The reverse holds when rates fall: your higher-paying bond becomes more valuable. This inverse relationship governs daily trading in the bond market and hits hardest on bonds with the longest maturities.
Holding to Maturity vs. Selling
If you hold an individual bond to maturity, the price swings along the way don’t cost you anything. You receive the full face value at maturity regardless of what rates did in between, assuming the issuer doesn’t default. That predictability is one of the main reasons investors buy individual bonds rather than bond funds.
Bond mutual funds and ETFs work differently. They hold a constantly rotating portfolio and never truly mature. Net asset value moves daily with interest rates, and there’s no guarantee you’ll get your original investment back when you sell. During sustained rate increases, fund investors can watch their principal shrink for months or years with no maturity date to bail them out.
Duration: How Much Prices Actually Move
Duration is a single number, expressed in years, that estimates how much a bond’s price will move when rates change. The rule of thumb: for every 1 percentage point increase in rates, a bond’s price drops by roughly its duration.2FINRA. Brush Up on Bonds: Interest Rate Changes and Duration A bond with a duration of 7 would lose about 7% of its value if rates jumped one full point, and gain about 7% if rates fell by the same amount.
That’s why long-term Treasury bonds with 20 or 30 years to maturity swing so hard during inflationary periods. Their durations can reach into the teens, so a 1.5% rate increase could knock 15% or more off the price. Short-term bonds with durations under 3 barely flinch by comparison. If you’re worried about inflation pushing rates higher, duration is the first number to check in your portfolio.
Real Yield Is What You Actually Earn
The nominal yield is the interest rate printed on the label. The real yield is what remains after inflation. Subtract the inflation rate from the nominal yield and you have it. A 5% coupon during 3% inflation gives you roughly 2% in real terms, and that 2% is the only part that makes you wealthier.
When inflation outpaces the nominal yield, the real yield turns negative and you’re losing purchasing power despite collecting interest. The CBO’s 2026 projections put the 10-year Treasury yield at 4.1% against 2.7% inflation, producing a real yield around 1.4%.1Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 Positive, but thin. If inflation surprised to the upside and hit 5%, a bondholder locked in at 4.1% would effectively be paying 0.9% a year for the privilege of lending money to the government.
Bonds Built to Handle Inflation
Treasury Inflation-Protected Securities
TIPS are the federal government’s direct answer to inflation risk. Unlike conventional Treasury bonds, a TIPS bond’s principal adjusts based on the Consumer Price Index for All Urban Consumers. When inflation rises, Treasury increases your principal balance. The fixed coupon rate then applies to that larger principal, so the dollar amount of each semiannual interest payment grows with prices.3Cornell Law School. 31 CFR Appendix C to Part 356 – Investment Considerations TIPS come in 5-, 10-, and 30-year maturities, and you can buy them directly through TreasuryDirect starting at $100.4TreasuryDirect. Treasury Inflation-Protected Securities (TIPS)
To decide whether TIPS or a conventional Treasury of the same maturity is the better buy, look at the breakeven inflation rate. Subtract the TIPS yield from the standard Treasury yield of the same term. If you think actual inflation will run above that difference, TIPS come out ahead. If you think inflation will stay below it, the conventional bond wins.
The catch is taxes. Each year the principal grows because of inflation, the IRS treats that increase as taxable income even though you haven’t received it in cash. The tax code classifies these annual adjustments as original issue discount, reported on Form 1099-OID.5eCFR. 26 CFR 1.1275-7 – Inflation-Indexed Debt Instruments6TreasuryDirect. Tax Forms and Tax Withholding You can owe tax on gains you won’t collect until maturity. The standard workaround is holding TIPS inside a traditional IRA or 401(k), where gains compound without triggering annual tax bills.
Series I Savings Bonds
Series I Savings Bonds offer a different flavor of inflation protection with some advantages over TIPS, particularly for smaller investors. An I Bond’s rate has two parts: a fixed rate that stays the same for the bond’s 30-year life, and a variable inflation rate that resets every six months based on CPI-U changes. For bonds issued from November 2025 through April 2026, the composite rate is 4.03%, combining a 0.90% fixed rate with a 3.12% annualized inflation component.7TreasuryDirect. Fiscal Service Announces New Savings Bonds Rates
The biggest edge over TIPS is tax timing. You can defer reporting I Bond interest until you redeem the bond, rather than paying tax on phantom income every year.8TreasuryDirect. Comparison of TIPS and Series I Savings Bonds Interest is exempt from state and local income taxes, as with TIPS. The tradeoffs are real. You can buy only $10,000 in electronic I Bonds per person per calendar year.9TreasuryDirect. How Much Can I Spend/Own? There’s no secondary market, a one-year minimum holding period, and a three-month interest penalty if you redeem within the first five years.
Reducing Inflation Exposure in a Conventional Bond Portfolio
Build a Ladder
A bond ladder is a portfolio of individual bonds with staggered maturity dates. You might hold bonds maturing in one, two, three, four, and five years, then reinvest each one as it matures into a new five-year bond at the long end. During periods of rising rates, that rolling reinvestment lets you capture higher yields relatively quickly rather than being stuck in a single low-rate bond for a decade. The ladder doesn’t eliminate inflation risk, but it keeps your portfolio from being entirely locked in at yesterday’s rates.
Consider Floating Rate Notes
Treasury Floating Rate Notes take a different approach. These two-year securities carry an interest rate that resets every week, tied to the highest accepted discount rate from the most recent 13-week Treasury bill auction plus a fixed spread set at issuance.10TreasuryDirect. Understanding Pricing and Interest Rates Because the rate adjusts weekly, FRNs carry almost no interest rate risk. When inflation pushes short-term rates up, FRN payments rise in near-lockstep. The tradeoff is that FRNs won’t lock in a high rate if yields later fall, and they don’t offer the CPI-linked principal protection of TIPS.
Weigh Individual Bonds Against Funds
If you plan to hold bonds until maturity, individual bonds let you ride out rate fluctuations and collect the full face value at the end. Paper losses along the way stay on paper. Bond funds never reach maturity, so their value rises and falls with rates indefinitely, creating real uncertainty about what your shares will be worth when you need the money. During inflationary periods when rates are climbing, that distinction becomes especially painful for fund holders watching net asset value decline with no maturity date on the horizon.