You buy a 20-year bond with a coupon rate of 9.6% that has a yleld to maturity of 10.5%. (Assume a face value of $1,000 and semiannual coupon payments.) Slx months later, the yield to maturity is 11.5%. What is your return over the 6 months? Note: Do not round intermedlate calculations. Enter your answer as a percent rounded to 2 decimal places. Negative amount should be Indicated by a minus sign