Answer: 12.5%
Step-by-step explanation:
From the question, we are informed that the State of Adaven issued $50 million of perpetual bonds in 1990 and that the bonds were issued in $100 denominations with an annual coupon interest rate of 5%.
The rate of return or current yield on these bonds if they are purchased at the current price of $40 will be calculated as:
= (5% × $100)/$40
= $5/$40
= 0.125 or 12.5%