Why do bond prices fall when yields rise?

The short answer

Imagine holding a bond paying $30 per year on a $1,000 face value. If new bonds suddenly offer $50 per year for the same risk and maturity, no one will pay $1,000 for your old bond — they could buy the new one and get a better yield. Your bond’s price must drop until its $30 coupon represents an equivalent yield to the new $50.

This inverse relationship is mechanical, not behavioral. A bond is a contract for fixed future cash flows. Its present value depends on the discount rate applied to those flows — and the discount rate is the prevailing market yield. When yields rise, the discount rate rises, and present value falls.

The magnitude depends on maturity. A 30-year bond suffers far larger price losses from a 1% yield increase than a 2-year bond, because more cash flows are pushed further into the future where higher discounting bites harder.

→ New to bonds? Real vs nominal returns

What the data shows

The 2022 bond bear market provides a textbook illustration. According to Bloomberg and FRED data:

• The Bloomberg US Treasury 20+ Year Index fell roughly 30% in 2022, the worst calendar year since the index inception
• The 10-year Treasury yield rose from 1.51% (end-2021) to 3.88% (end-2022)
• A 30-year Treasury with a duration of 18 lost approximately 18% in price for every 1% yield increase, before convexity adjustment
• Short-duration funds (1-3 year) lost only 3-5% over the same period despite a similar yield rise

The exception worth noting: bonds with embedded optionality (callable bonds, mortgage-backed securities) deviate from this textbook relationship because the issuer’s right to refinance interacts with the duration calculation. MBS can exhibit negative convexity in falling-rate environments.

→ Dataset: US 10-year Treasury yield dataset

Why it happens — the macro mechanism

The price-yield inverse relationship operates through three reinforcing channels.

Discounting future cash flows. A bond’s price equals the sum of all future coupons plus principal, each discounted to present value using the prevailing yield. When yields rise, every future cash flow is divided by a larger denominator. Mathematically, price = Σ(CF/(1+y)^t), and any increase in y reduces the sum. This is why duration — the weighted average time of cash flows — is the dominant driver of price sensitivity.

Substitution by market participants. Bond markets are deeply liquid, and any price discrepancy is rapidly arbitraged. If a 5-year bond yields 3% while comparable new issues yield 4%, traders sell the older bond until its price drops enough to deliver an equivalent 4% yield. Market microstructure ensures this happens within seconds in liquid Treasury markets.

Transmission to economic activity. Rising yields don’t just reprice existing bonds — they raise borrowing costs for governments, corporations and households. This feedback loop reinforces the move: tighter financing conditions slow growth, which eventually triggers central bank response, which then drives yields back down. Monetary transmission closes the loop.

Synthesis by regime: in tightening cycles, bond price losses concentrate at the long end and propagate to all duration-sensitive assets including utilities, REITs and growth equities.

A bond’s price is yesterday’s promise discounted by today’s alternatives.

→ Framework: Monetary regimes pillar

What it means for different economic actors

Savers holding individual bonds to maturity recover face value at par regardless of interim price moves, but those holding bond funds experience the price losses directly when shares are redeemed.

Investors face an asymmetry between price losses (immediate) and yield gains (gradual). After 2022, US investors who held long-duration funds suffered double-digit drawdowns while their forward yield improved meaningfully — a trade-off that requires understanding holding-period horizons.

Pension funds and insurers with long-dated liabilities can actually benefit from rising yields if their assets are duration-matched, because liability discount rates rise alongside asset yields. The 2022 episode improved many corporate pension funding ratios despite asset losses.

A common error is treating bonds as monolithically safe. Duration risk is real and quantifiable, and a 30-year Treasury is not a low-volatility instrument when yields move sharply.

Practical observation

Go deeper

Related questions

• What is duration and why does it matter?
• How does convexity protect bondholders?
• What is the term structure of interest rates?
• Why does the yield curve invert?

Frequently asked questions

How is the price-yield relationship mathematically defined?

The price of a bond equals the present value of all future cash flows discounted at the yield-to-maturity. Mathematically, P = Σ(C/(1+y)^t) + F/(1+y)^n, where C is the coupon, F is face value, y is yield, and t is time to each cash flow. Taking the derivative dP/dy yields a negative number, formalizing the inverse relationship. The first-order approximation of percentage price change equals minus modified duration times yield change, which works well for small yield moves.

Do all bonds lose the same when yields rise?

No, the price impact varies dramatically by duration. A 30-year zero-coupon Treasury has a duration of approximately 30, meaning a 1% yield rise produces around a 30% price loss. A 1-year Treasury bill has a duration close to 1 and loses only about 1%. Coupon bonds with the same maturity have shorter durations than zero-coupons because intermediate coupons return capital sooner. The 2022 bear market showed this dispersion clearly across the maturity spectrum.

Does buying bonds when yields rise lock in higher returns?

Investors who purchased bonds at higher yields effectively lock in those yields to maturity, assuming no default. This is mathematically distinct from holding bonds whose price drops in a rising-yield environment. Empirically, periods of rising yields create higher prospective returns for new bond purchases, while imposing capital losses on existing holdings. The 1980s, when 10-year yields exceeded 14%, became one of the strongest forward bond return regimes in modern history.

Last updated — 5 May 2026