Hedged or Unhedged? The Currency Question Every CPF Provider Needs to Answer

The permitted investment universe for the CPF lifecycle scheme is global. The retirement outcomes members are trying to secure are measured in SGD. That mismatch is a design decision, and it deserves the same analytical rigour as the glidepath itself.

When a CPF lifecycle fund invests in global equities, it takes on two sources of risk: market risk from the assets themselves, and currency risk from holding USD, euro, yen, or other foreign-currency assets against an SGD-measured retirement objective. Most lifecycle discussions focus on the first but the second is just as structural.

This is the final post in our series on what it takes to build a credible CPF lifecycle investment scheme submission. The previous posts covered glidepath analytics and what strong design will actually require, the analytical infrastructure that makes a glidepath credible, member retention design and the behavioural risks that no glidepath can fix, and the age-55 eligible balance mechanics that most generic models miss. This post is for the investment teams and risk officers responsible for the design question that sits just outside the glidepath: whether to hedge the scheme's global currency exposure, and how to make that call analytically rather than by assumption.

What hedging does and does not do

A currency hedge, in its simplest form, reduces the effect of exchange-rate movements on the SGD value of foreign-currency assets. For a fund holding global equities, an SGD hedge can reduce the direct volatility from exchange-rate movements, though the effect on total portfolio risk depends on how the currency exposure interacts with the underlying assets and how markets behave under stress.

The cost is that hedging is not free. In practice, the forward hedge largely reflects the interest-rate differential between the two currencies. When US rates are above Singapore's, hedging USD exposure back to SGD carries a cost that flows through as a drag on NAV returns. When the differential narrows or reverses, the hedge can generate a carry gain. The outcome is path-dependent and not knowable in advance.

There is also a risk interaction that simple return comparisons often miss. In some risk-off environments, equity prices fall whilst the US dollar strengthens, giving an unhedged SGD investor a currency gain that partly offsets the equity loss. That correlation between the dollar and risk assets can shift over time, so the offset should be modelled rather than assumed. A hedged investor gives up that potential cushion but equally avoids the scenario where a strengthening SGD erases foreign-equity gains at the wrong point in the lifecycle. Hedging can reduce one source of risk whilst also imposing a performance cost and removing a diversification effect. Those trade-offs need to be justified through analysis.

Why "SGD-denominated" does not always mean "currency-hedged"

Before running any comparison, providers need to verify what they are actually buying. Some funds marketed as SGD share classes are not explicitly currency-hedged in the traditional forward-contract sense. A fund may report its NAV in SGD whilst still holding USD assets without a hedging programme. In that case, members receive SGD-denominated accounting but retain the underlying currency exposure. The distinction matters for outcomes, disclosure, and independent review. Providers should confirm the actual hedging mechanics of any fund under consideration before making it the basis of a glidepath.

Why the outcome that matters is not just the median

Comparing hedged and unhedged strategies through median expected wealth will often make hedging look unattractive. During the growth phase of a lifecycle fund, the purpose is to take rewarded investment risk and let returns compound. If the interest-rate differential creates a recurring hedge cost, that drag reduces expected SGD returns and compounds significantly over time, a 1% annual cost over 20 years can have a very large effect on final wealth. On a median-wealth measure, an unhedged strategy will often come out ahead.

A CPF lifecycle fund, though, is designed to help members reach defined SGD thresholds: the Full Retirement Sum (FRS) at age 55 and adequate income from CPF Lifelong Income For The Elderly (CPF LIFE) from age 65. A better question is which strategy produces the most robust distribution of outcomes at those points, and here the answer becomes genuinely more nuanced.

A hedged strategy may narrow the distribution of SGD outcomes in some currency markets or shorter-horizon settings. If the Singapore dollar strengthens materially near the point where outcomes are measured, an unhedged portfolio can lose part of its accumulated gain at exactly the wrong moment. Whether hedging actually improves lower-tail FRS and Enhanced Retirement Sum (ERS) attainment outcomes should be demonstrated through modelling rather than assumed because in some scenarios it does not.

For long-horizon accumulation, the growth phase is where the portfolio should generally be allowed to take investment risk rather than give up performance to reduce every source of volatility. The case for hedging becomes more relevant later in the lifecycle, as members move toward the point where outcomes are measured and the investment problem shifts from maximising growth to protecting an SGD-measured result over a shorter horizon. A partial or phased hedge in the final years before retirement can be worth considering but the case still needs to be proven in context.

What the modelling actually requires

Running a credible hedged-versus-unhedged comparison requires more than a generic hedge/no-hedge view. The modelling framework needs to answer five linked questions:

• Which currency exposures actually drive the scheme's SGD outcome risk?

• What is the expected carry cost or carry gain of hedging each exposure?

• How have those currencies behaved across normal, inflationary, recessionary, and risk-off regimes?

• At what stage of the lifecycle does currency risk shift from long-horizon diversification to short-horizon retirement-outcome risk?

• What happens to FRS attainment, ERS attainment, age-65 wealth, and lower-tail shortfall under unhedged, hedged, and phased hedge assumptions?

A model that applies a currency adjustment on top of an existing equity forecast, or bundles all non-SGD exposure into one generic foreign-currency bucket, will miss most of this. The Economic Scenario Generator needs to model the relevant currency exposures as integrated parts of the broader scenario set alongside equity returns, interest rates, carry assumptions, and stress regimes. A model that treats currency as a separate overlay will miss the way exchange rates behave when equity markets fall, which is precisely when lower-tail attainment outcomes matter most.

The comparison also needs to run across the full glidepath horizon, not just at a single point. Currency exposure changes as the portfolio de-risks from global equities into SGD-denominated instruments approaching the age-55 eligible balance assessment, and the hedge ratio that makes sense at age 30 may be entirely different at age 50. USD, EUR, JPY, and other exposures carry different cost profiles, volatility patterns, and correlations with risk assets, so the decision has to be market-specific, time-specific, and outcome-specific.

KidbrookeONE's Economic Scenario Generator can support modelling of SGD exposure against the relevant currency markets as integrated elements of the scenario generation process. Providers can run hedged, unhedged, and phased hedge variants of the same glidepath through the same scenario set and compare FRS attainment probability, ERS attainment probability, age-65 wealth distribution, and lower-tail outcomes on a genuinely apples-to-apples basis, with the currency correlation structure built in rather than assumed away.

This is where Kidbrooke®'s role is strongest. We are not a product provider arguing for one pre-set hedge policy. We are an analytics company specialising in forecasting and modelling, helping providers understand how design choices affect member outcomes across thousands of plausible futures.

The currency question has no universal right answer

Across this series, one theme has recurred: what looks like an investment choice is usually, underneath it, an analytical one, whether that is glidepath design, retention mechanics, age-55 modelling, or currency hedging. The right hedge policy depends on the member population, time horizon, risk budget, and the specific currency markets involved. There is no single correct answer, and this should not be read as individual financial advice. But there is a correct process: model the full distribution of outcomes under hedged, unhedged, and phased hedge assumptions, account for the actual carry cost in each market, and make the decision based on what the analysis shows rather than what feels more conservative.

The strongest submission will come from a provider who can show why the chosen policy is appropriate for the relevant currencies, the carry environment, the member lifecycle, and the SGD retirement outcome being targeted. Building that analytical foundation; across the glidepath, the retention layer, the age-55 mechanics, and the currency decision; is what separates a CPF-specific design from a generic lifecycle template adapted for Singapore.

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Kidbrooke® is a financial technology company providing unified investment and wealth analytics through KidbrookeONE, an API-first platform serving pension providers, asset managers, and wealth platforms.