Bond Price Change Calculator

How to use this calculator

Enter current value, duration, rate change, and starting yield. The tool estimates approximate price impact and one-year yield offset.

When this calculator is useful

• Explaining why bond funds fall when rates rise
• Comparing short-duration and long-duration funds
• Stress-testing rate scenarios

Important limitations

Duration is an approximation. Convexity, credit spreads, defaults, fund flows, and changing yield curves can alter results.

For best results, run at least three cases: a conservative case, a middle case, and a stretch case. If a small change in inputs creates a big change in the answer, that is a sign the decision may be sensitive to rates, fees, timing, or market performance.