Liability-driven investing
What is Liability-driven investing?
Liability-driven investing manages assets with explicit reference to the amount, timing, currency, inflation sensitivity, and risk of future obligations.
Asset and liability values should share currency, discount curve, inflation basis, probability, and valuation date. A falling funded ratio can result from liability rates as well as asset loss. Dashboards should attribute both sides and avoid celebrating asset outperformance that leaves the actual obligation less secure.
Governance should specify hedge objectives, tolerances, collateral, counterparties, leverage, and responsibility for rebalancing.
Implementation records should separate strategic hedge changes from market-driven drift and collateral-related trading.
Liability as the benchmark
Rather than judging assets only against a market index, LDI evaluates whether they fund promised cash flows. Liabilities are projected and discounted under a defined method. Pension payments, insurance claims, endowment spending, and personal goals differ in certainty and duration, so the relevant hedge portfolio and return-seeking allocation differ.
Hedging liability risk
High-quality bonds, inflation-linked securities, swaps, and other derivatives can align duration, curve, inflation, and currency exposure. Cash-flow matching funds specific dates, while duration matching controls sensitivity to rates. Credit and basis differences mean an asset can match duration yet fail to deliver the liability cash flow under stress.
Return-seeking assets
When assets exceed the hedging allocation or liabilities remain underfunded, growth assets may seek improved funded status. Their risk should be evaluated against the liability, not in isolation. A rise in assets can still coincide with a worse funded ratio if liabilities rise more, and a negative asset return can improve status if liabilities fall further.
Leverage and liquidity
Derivatives can hedge large liability sensitivity with limited initial cash, leaving assets for growth, but create collateral calls, counterparty exposure, basis risk, and forced-sale danger. A liquidity waterfall and stress testing are central. The strategy can fail operationally even when the long-run economic hedge is sound.
Practical framework
Model liability cash flows, uncertainty, discount basis, funded status, sponsor or investor capacity, contribution policy, and risk limits. Choose hedge ratio, eligible instruments, collateral, rebalancing, and governance. Monitor asset and liability attribution together. Avoid presenting a hedge percentage as certainty when longevity, inflation, credit, and legal obligations remain uncertain.
Also known as: LDI
Sources and further reading
- Liability-Driven and Index-Based Strategies, CFA Institute