Mostly 18 years is it until the bond matures.Given; Semiannually, 5 percent coupon bond, market price = $988.52Solution; $988.52 = [(.05 / 2) × $1,000] × [(1 - {1 / [1 + (.0568 / 2)]t × 2}) / (.0568 / 2)] + $1,000 / [1 + (.0568 / 2)]t × 2; t = 3.6 semi-annual periods, or 1.8 years
The answer in this question is 18 years.