Answer:
8.16%
Explanation:
current yield = bond's value x (1 + semiannual interest rate)ⁿ
in this case:
current yield = $1,000 x (1 + 4%)² = $1,000 x 1.0816 = $1,081.60
in order for a bond that pays an annual coupon to be sold at the same value, it must yield the same return = ($1,081.60 - $1,000) / $1,000 = 8.16%