How to use contracts to change the portfolio duration when there is an interest rate increase? For example, which one or more contracts should be used? 10 year contract: $100000 Face Value, 6%p.a. semi-annual coupon and current YTM of 3.8%p.a. 5 year contract: $100000 Face Value, 2%p.a. semi-annual coupon and current YTM of 3.6%p.a. 3 year contract: $100000 Face Value, 6%p.a. semi-annual coupon and current YTM of 3.5%p.a. The current portfolio duration is 5.288993399 years and the duration of the portfolio must be between 4 and 6 years. Outline a strategy using one or more of these contracts to achieve the desired duration position for your portfolio.