Hedging Duration Risk in Pension Plans
- DAISAKU KADOMAE
- Jul 22, 2025
- 1 min read
Updated: Aug 14, 2025

This diagram explains how a hedging strategy using bonds and interest rate swaps protects a pension fund against falling interest rates.
Initial Situation (Discount rate = 4%):
Present pension liability: 46 (grows to 100 in 20 years).
Hedging:
(I) Invest 46 in 20-year bonds.
(II) Enter an interest rate swap (fixed 4%, notional 46).
No cash remaining.
After Interest Rate Falls by 1% (to 3% discount rate):
Present value of liability increases to 55.
Bond value increases to 55.
The swap gains 9 (fixed received > floating paid).
Net result: The increase in liability is fully offset by asset and swap gains.
Key Insight:
Combining long-term bonds with interest rate swaps effectively hedges duration risk and cushions the impact of falling interest rates on pension liabilities.



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