Reinvestment Risk is the risk that an investor may have to reinvest proceeds (like interest or principal payments) at a lower rate of return than the original investment. This typically affects fixed-income securities such as bonds or fixed deposits, especially in falling interest rate environments.
When interest rates decline, any coupons, dividends, or matured amounts that the investor receives might not find new investment opportunities with comparable returns. This can lower the overall expected income or yield.
Suppose you invest ₹10 lakh in a bond that pays 8% annual interest for 5 years. You receive ₹80,000 each year. If after 3 years interest rates drop to 5%, you will have to reinvest that ₹80,000 (and eventually the principal) at 5%—much lower than your original rate. That’s reinvestment risk.
These are opposite in nature, but both affect fixed-income investors.
Investors in India using Fixed Deposits (FDs) or Government Securities (G-Secs) are familiar with this risk. For instance, after receiving high FD interest rates in past years, they may face much lower reinvestment rates when those FDs mature today.