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Interest rates are predicted to increase which will decrease the value of any fixed income assets (or liabilities). In a rising interest rate environment one would want to decrease the duration of their bonds so they are less sensitive to changing interest rates. This can be accomplished through a swap by receiving floating and paying fixed or by selling Treasury futures contracts. Using a swap is the preferred method because it is cheaper to implement than using futures. The duration of a swap is determined by what is received minus what is paid out: D_swap = D_received − D_pay. Since the duration of the floating side is very small the duration of a receive floating pay fixed swap should be very small and lower the duration of their portfolio: D_swap = D_received − D_pay < 0.