Immunization is a fixed-income portfolio technique designed to reduce the effect of interest-rate changes on the ability to fund a known future liability. The manager generally aligns the portfolio’s duration with the liability horizon and ensures that the present value of the assets is sufficient to cover the present value of the obligation. Option B is correct.
Interest-rate changes affect bond portfolios in two opposing ways. Rising yields reduce current bond prices but increase the return available when coupon payments are reinvested. Falling yields increase bond prices but reduce reinvestment income. Proper duration matching seeks to balance these effects over the liability period.
Immunization is not a one-time guarantee. Duration changes as time passes, yields change and cash flows occur. The portfolio must be monitored and periodically rebalanced. Credit defaults, liquidity constraints, transaction costs and non-parallel yield-curve movements can also undermine the strategy.
Market timing involves forecasting broad market movements. Growth investing is an equity-selection strategy, while sector concentration would generally increase rather than control risk.
The Retail Securities syllabus includes immunization, passive buy-and-hold, index matching, duration management, bond swaps and sector rotation as fixed-income portfolio-management techniques. It also requires candidates to apply duration and interest-rate risk concepts to portfolio decisions.
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