You buy a $20-$year bond with a coupon rate of $9\mathrm{.}9\%$ that has a

yield to maturity of $10\mathrm{.}9\%.($Assume a face value of $$1,000$ and

semiannual coupon payments.$)$ Six months later, the yield to

maturity is $11\mathrm{.}9\%.$ What is your return over the $6$ months?