Duration and convexity are two tools used to manage the risk exposure of fixed-income investments. Duration measures the bond's sensitivity to interest rate changes. Convexity relates to the interaction between a bond's price and its yield as it experiences changes in interest rates. With coupon bonds, investors rely on a metric known as duration to measure a bond's price sensitivity to changes in interest rates. Using a gap management tool, banks can equate the durations of assets and liabilities, effectively immunizing their overall position from interest rate movements.