What is currency risk in investing?

It is the part of your return that comes from exchange-rate moves when you hold assets priced in another currency. A foreign asset can rise in its home currency yet lose value in yours if your home currency strengthens, and the reverse is also true.

Should I buy hedged or unhedged ETFs?

For foreign stocks, many long-term investors stay unhedged (currency adds only modest volatility and some diversification, and hedging costs money); for foreign bonds, hedging is more common because currency swings can dwarf the bond’s return. It depends on your horizon and home currency, so test both.

Does currency hedging cost money?

Yes: hedging uses currency contracts that carry an ongoing cost and never track perfectly, so a hedged fund typically lags its unhedged version by a small amount over time in exchange for removing the currency swing.

Currency Risk and Hedging: Should You Hedge Your Foreign Investments?

6 min read · Updated 2026-09-04

The moment you own something priced in another currency (a US stock as a Canadian, a global fund as a UK investor), your return has a second engine you may not have noticed: the exchange rate. The asset can rise in its home currency while you lose money in yours, or the reverse.

That is currency risk. It is not automatically good or bad, but it is worth understanding, because you often get a choice: a hedged or an unhedged version of the same fund. This guide explains the trade-off in plain English and shows how to test it on real data.

Backtest hedged vs unhedged →

What currency risk actually is

Your total return on a foreign holding is roughly the asset’s return in its own currency, plus the change in the exchange rate between that currency and yours. If a US index gains 10% in US dollars but the US dollar falls 8% against your home currency, your gain in your own money is only about 2%. Had the US dollar instead risen 8%, you would be up around 18%.

So two investors in different countries can hold the exact same fund and earn very different returns, purely because of where they measure it from.

Hedged vs unhedged funds

Providers offer two flavors of many international funds:

•Unhedged: you get the asset’s return plus the currency move, whatever it is. Simpler, cheaper, and the swing adds a little diversification (foreign currencies often firm up when your home market is weak).
•Hedged: the fund uses currency contracts to cancel out the exchange-rate move, so you get close to the asset’s home-currency return. Steadier in your own currency, but the hedge has an ongoing cost and never tracks perfectly.

Same +10% foreign asset, different home-currency return (illustrative)

Asset in its home currency

10%

Unhedged · your currency falls 8%

18%

Unhedged · your currency rises 8%

Hedged (currency removed)

10%

Hypothetical: a 10% year for a foreign asset under different currency moves. Hedging aims for the flat middle; unhedged rides the swing. Test real periods in the tools.

When hedging tends to be worth it

There is no universal answer, but a few principles show up again and again:

•For foreign bonds, hedging is common: currency swings are often larger than the bond’s return itself, so leaving them unhedged can drown out the very stability you bought bonds for.
•For foreign stocks, many long-term investors stay unhedged: equities are volatile anyway, currency adds only a modest amount, and the diversification plus the saved hedging cost is usually worth it.
•Shorter horizons, and money you will spend soon in your home currency, tilt toward hedging: there is less time for a currency swing to wash out.
•Cost matters: a hedge you pay for every year has to overcome that drag to be worth it.

Currency can cut both ways, and that’s the point

It is tempting to treat currency purely as a risk to be removed, but an unhedged foreign holding is also a diversifier: home-country downturns are often accompanied by a weaker home currency, which lifts the value of your foreign assets exactly when you need it. Hedging that away can remove a cushion along with the noise.

The honest framing is not “hedged is safer.” It is “hedged trades a currency swing (in both directions) for a steadier ride and an ongoing cost.”

Test it on your own holdings

Because the answer depends on your home currency and horizon, the useful move is to measure it. Backtest a hedged and an unhedged version of the same exposure over the same period and compare the return, the volatility, and the worst drawdown, then look at how each behaved in a stretch when your home currency was strong versus weak. Seeing the actual size of the currency effect usually settles the debate faster than any rule of thumb.

Try it yourself

Backtest PortfolioCompare hedged vs unhedged exposure on real, currency-adjusted data.Open tool →Asset CorrelationsSee how a foreign holding moves relative to your home market.Open tool →Stress TestCheck how the currency effect behaved through past crises.Open tool →

FAQ

What is currency risk in investing?: It is the part of your return that comes from exchange-rate moves when you hold assets priced in another currency. A foreign asset can rise in its home currency yet lose value in yours if your home currency strengthens, and the reverse is also true.
Should I buy hedged or unhedged ETFs?: For foreign stocks, many long-term investors stay unhedged (currency adds only modest volatility and some diversification, and hedging costs money); for foreign bonds, hedging is more common because currency swings can dwarf the bond’s return. It depends on your horizon and home currency, so test both.
Does currency hedging cost money?: Yes: hedging uses currency contracts that carry an ongoing cost and never track perfectly, so a hedged fund typically lags its unhedged version by a small amount over time in exchange for removing the currency swing.

Key terms in this guide

Plain-English definitions in the Learning Hub.

Volatility (annualized standard deviation) →Correlation →Total return →Tracking error →Maximum drawdown →

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