Investors choosing currency-hedged share classes are deciding how to treat currency risk separate from the underlying asset exposure. Hedging uses forward contracts or swaps to neutralize gains and losses from exchange-rate moves, so returns reflect the local market performance in the investor’s home currency rather than foreign-currency fluctuations. This does not change the underlying economic exposure to equities or bonds, but it changes the volatility and sources of return experienced by the investor.
How hedging changes returns
Hedging typically reduces short-term volatility because it removes the direct impact of currency swings. Antti Ilmanen at AQR Capital Management documents that hedged international exposures show lower return dispersion versus unhedged exposures, which can be particularly valuable for liability-matching investors like pension plans. However, hedging also has consequences for long-term returns. If a foreign currency appreciates against the investor’s home currency, an unhedged investor benefits; a hedged investor forgoes that gain. Conversely, hedging protects against local currency depreciation. Aswath Damodaran at NYU Stern explains that whether hedging improves expected returns depends on whether currency movements are a net source of return or simply noise relative to the investor’s objectives.
Costs and practical considerations
Hedging is not free. The forward exchange rate reflects interest rate differentials through covered interest parity, so rolling hedges involve implicit financing costs tied to short-term rates. Transaction costs, management fees, and imperfect hedges can further erode returns. Over different time horizons and market regimes these costs can materially change outcomes. For example, in periods where the foreign currency has persistently strengthened, hedging can lead to underperformance compared with an unhedged position; in crisis periods with sharp currency falls, hedging can preserve capital.
Beyond pure finance, cultural and territorial factors matter: investors in emerging markets with volatile currencies may place higher value on hedging to maintain purchasing power at home, while expatriates or multinational corporations may prefer unhedged exposure as a natural currency match for foreign revenues. Environmental or geopolitical events that disproportionately affect a country’s currency add another layer where hedging can reduce sudden losses.
In practice, selecting a hedged share class should align with goals, liability profile, and views on currency risk. Institutional research and academic analysis both stress that the decision is not universally beneficial; it is a trade-off between reduced volatility and potential foregone gains, with costs and the investor’s time horizon determining the net effect.