One framing I keep coming back to is this: duration is best understood as price sensitivity to yield changes, not as "time to maturity." Desk note: Maturity tells you when principal comes back. Duration tells you how much the price will care when yields move before that happens. Why investors care: That is why two bonds with long maturities can still behave quite differently if coupon structure is different. $$ \frac{\Delta P}{P} \approx -D \cdot \Delta y $$ Plain English: Price change is approximately duration times the yield move, with the opposite sign. Translate it into behavior: A low-coupon long bond tends to feel rate changes more sharply than a higher-coupon peer with similar maturity. Where people usually get tripped up: The mistake is using maturity as a shortcut for interest-rate risk. Keep this nearby on the next review: On the next portfolio review, separate what feels urgent from what is structurally important. That is the kind of small conceptual habit that compounds into better decisions over time.