A $30-$year $1000$ par value bond with pays coupons of size $25\mathrm{.}22$ every $6-$months and redeems for par.

The bond is purchased for a price that results in a nominal annual yield rate of $11\mathrm{.}6\%$ compounded

semiannually. Suppose that the bond is called $($i$.$e$.$ redeemed$)$ prior to the actual maturity date but

immediately after a coupon payment is made. This early redemption results in an actual nominal yield

rate convertible semiannually of $12\mathrm{.}4\%.$

Calculate the number of years that the bond was held. Give your answer rounded to the nearest

whole number $($i$.$e$.$ X$).$

Answer:

Enter an exact number.