What can protect investors from having debt with an attractive yield refinanced before maturity?

Question

Quizplus · Accepted Answer

The call premium is a fee paid to the investor to protect them from having the debt refinanced before maturity. This fee must be paid by the issuer in order to call the debt early, making it less likely that they will do so. Therefore, choosing a debt instrument with a call premium is the best protection for investors against early refinancing.

What Can Protect Investors from Having Debt with an Attractive