Should International Investors Hedge Currency?
When you buy foreign stocks, you take on two bets: the companies and the currency. Hedging removes the second one for a fee. Here's when that trade is worth making, and when it isn't.
Don't have time? Here's what you need to know:
- 1Every international holding combines an asset bet and a currency bet; hedging removes the second one for a fee.
- 2Hedging carries an ongoing cost and strips a mild diversification benefit, so many investors leave long-term equities unhedged.
- 3Bonds are usually hedged because currency swings can exceed the yield and defeat the stability bonds are meant to provide.
- 4Decide your hedging policy by asset type and horizon in advance; switching based on currency forecasts is market timing.
Every Foreign Investment Is Two Bets
When you buy an international fund, your return has two moving parts: how the underlying stocks or bonds perform in their local currency, and how that currency moves against yours. If a European fund's stocks rise 8% in euros but the euro falls 5% against your home currency, your actual return is much smaller than the headline. The reverse is also true: a falling home currency can boost your foreign returns even when the underlying assets are flat.
A currency-hedged fund uses forward contracts to neutralise that second bet, so your return tracks the local-currency performance of the assets and ignores the exchange-rate move. An unhedged fund leaves the currency exposure in place. Neither is automatically better. The right choice depends on what you are buying, your time horizon, and how much short-term volatility you are willing to absorb.
What Hedging Costs You
Hedging is not free. There is a direct cost in the form of a slightly higher expense ratio, since running the forward contracts takes work. There is also an indirect cost tied to interest-rate differences between currencies, which can either add to or subtract from a hedged fund's return depending on which way rates point. Over long periods, these costs accumulate, and for equities they often outweigh the benefit.
Hedging also removes a diversification benefit. Foreign-currency exposure does not always move with your stock portfolio, so it can act as a mild diversifier; hedging strips that away. For a long-term equity investor, the academic and practitioner consensus leans toward leaving equities unhedged: over decades, currency moves have tended to wash out, and you avoid paying the hedging cost every year for protection you may not need.
Tip: Over long horizons, equity currency exposure has historically tended to mean-revert rather than compound into a permanent loss, which is a key reason many long-term investors leave stock funds unhedged.
Where Hedging Earns Its Keep: Bonds
The calculus flips for bonds. The whole point of a bond allocation is stability and predictable income, and currency swings can easily be larger than the bond yield itself, swamping the very stability you bought bonds for. A foreign bond can pay 3% in local terms and still lose money for you if its currency falls 5%. That volatility defeats the purpose of holding bonds in the first place.
This is why hedged international bond funds are common and widely recommended, while hedged international equity funds are more of a niche choice. A fund like BNDX holds international bonds hedged back to the US dollar precisely so that currency noise does not overwhelm the income. The general rule of thumb: hedge international bonds, and lean toward leaving international equities unhedged unless you have a specific short-horizon reason not to.
| Asset | Common approach | Why |
|---|---|---|
| International equities (long-term) | Often unhedged | Currency tends to wash out; hedging costs add up |
| International equities (short horizon) | Hedging can help | Less time for currency swings to mean-revert |
| International bonds | Usually hedged | Currency swings can exceed the yield itself |
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Making the Call for Your Portfolio
For most long-term investors, a reasonable default is to hold international equities unhedged and international bonds hedged. That captures the diversification benefit of foreign-currency equity exposure where it has historically mattered little over decades, while protecting the bond allocation where currency volatility does real damage. It is also the structure many broadly diversified funds adopt by default.
There are legitimate reasons to deviate. If you have a short time horizon, are spending the money in your home currency soon, or simply cannot stomach the added volatility that currency swings add to an equity portfolio, a hedged equity fund is a defensible choice despite its cost. The point is to make the decision deliberately, understanding that you are trading a small ongoing cost for reduced short-term currency volatility, rather than assuming hedged or unhedged is universally correct.
Important: Don't switch between hedged and unhedged funds based on currency forecasts. Reacting to exchange-rate predictions is a form of market timing, and it tends to cost more than it saves.
Frequently Asked Questions
Should I hedge currency on my international stock ETFs?
For long-term equity holdings, many investors leave them unhedged. Over decades, currency moves have tended to wash out, hedging adds an ongoing cost, and foreign-currency exposure provides a mild diversification benefit. Hedging equities makes more sense if you have a short time horizon or cannot tolerate the extra short-term volatility that currency swings add.
Why are international bond funds usually hedged?
Because currency swings can be larger than the bond yield itself, defeating the stability that is the whole reason to hold bonds. A foreign bond paying 3% locally can still lose money if its currency falls 5%. Hedging removes that noise so the bond allocation behaves predictably, which is why funds like BNDX hedge international bonds back to the US dollar.
Does currency hedging cost money?
Yes. Hedged funds carry a slightly higher expense ratio for running the forward contracts, plus an indirect cost or benefit tied to interest-rate differences between currencies. Over long periods these add up, which is part of why hedging is often not worth it for long-term equity holdings but is generally worth it for bonds, where the protection is more valuable.
Can I switch between hedged and unhedged based on the exchange rate?
It is not advisable. Switching based on currency forecasts is a form of market timing, and exchange rates are notoriously hard to predict. The cost and tax consequences of trading in and out usually outweigh any benefit. A better approach is to decide your hedging policy in advance based on your assets and horizon, then stick with it.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.