Why bond prices fall when yields rise

RESEARCHED EXPLAINER

3 linked sources · Published Oct 24, 2026

The payment stream stays fixed while its price changes

A conventional fixed-rate bond promises specified coupon payments and repayment of principal under its terms. Once it is issued, those scheduled payments do not rise simply because newly issued bonds offer higher interest rates. Investors therefore adjust the price they are willing to pay for the existing bond. The Securities and Exchange Commission explains the central relationship: for fixed-rate bonds, market interest rates and prices generally move in opposite directions. A lower purchase price raises the return represented by the same payment stream, bringing the older security into competition with new alternatives.

Coupon, current yield and yield to maturity differ

The coupon rate describes the contractual interest relative to the bond’s face value. Current yield compares the annual coupon with today’s market price. Yield to maturity incorporates the price, remaining coupon payments and principal repayment under simplifying assumptions, including holding through maturity and reinvesting coupons at that yield. Those measures answer different questions. A bond trading below face value can have a current yield above its coupon rate, while its yield to maturity reflects an additional potential gain as principal is repaid. None of these labels removes credit, liquidity or interest-rate risk.

Time changes the sensitivity

All else equal, a bond whose cash flows arrive farther in the future is usually more sensitive to a change in required yield. Duration summarizes that sensitivity; maturity alone does not fully describe it because coupons and their timing matter. The SEC notes that longer-maturity bonds generally carry greater interest-rate risk than otherwise similar shorter bonds. A government security can therefore have substantial price volatility even where the investor regards default risk as low. A bond fund also has no single maturity at which the investor is promised the original purchase price back.

Connect the mechanics to a trading view

A fall in a Treasury price is consistent with a rise in its yield, so reporting the two as contradictory signals is a basic mistake. Before drawing conclusions, identify the maturity, whether the instrument has a fixed coupon, and whether the quoted return is nominal or inflation-adjusted. A bond held to maturity has a different path of realized outcomes from one sold during a price decline, provided the issuer honors its obligations. For traders, leverage can magnify sensitivity to small yield changes. Understanding the cash-flow mechanics should come before a directional view about the next economic release.

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