Suppose you purchase a zero-coupon bond when it has exactly 12 years remaining until maturity and a yield-to-maturity of 3.1%. You hold the bond for 6 months and then sell it. If the bond's yield-to-maturity when you sell it is 7.7%, what is your percentage return over this 6-month holding period? When computing bond prices, use a semi- annual compounding period. Enter your answer as a decimal and show 4 decimal places. For example, if your answer is 6.25%, enter 0625. DO NOT annualize your final answer Type your answer Provin NAVE