Answer:
The issuer will exercise the call option only when the prevailing market rate exceeds the coupon rate of the bond.
Step-by-step explanation:
In simple words, callable bonds refers to the bonds with a special embedded option. In such bonds, the issuer have the right to buy back these bonds at a predetermined price after a certain lockout period.
Obviously such bonds are less attractive for bondholders as the issue will only buy back these bonds when the rates in the market are low and bonds can be purchased at a lower value .