You buy an 8% coupon, 20-year maturity bond when its yield to maturity is 9%. (assume semiannual coupon payments.) six months later, the yield to maturity is 10%. what is your return over the 6 months

You buy an 8% coupon, 20-year maturity bond when its yield to maturity is 9%. (assume semiannual coupon payments.) six months later, the yield to maturity is 10%. what is your return over the 6 months?