Should You Currency-Hedge Your ETFs? It Depends on Your Home Currency
Buying a foreign ETF is two bets at once: one on the companies, one on the currency. Whether to neutralise the second has no universal answer. It depends on what your own currency does when markets crash.
The short answer
- • Stocks, currency that falls in crises (commodity exporters): leaving foreign stocks unhedged has lowered risk.
- • Stocks, currency that rises in crises (safe havens): the same logic points toward hedging more.
- • Bonds: hedge. Currency swings can swamp a bond's own volatility.
- • A hedged ETF only helps if it hedges to your currency.
1. What hedging actually does
Your return in home currency is, roughly, the fund's return in its own currency plus the change in that currency against yours. A hedge removes the second term, usually by selling the foreign currency forward and rolling the contract every month.
Hedging removes risk only if that second term was adding risk. If the currency tends to move opposite to the asset, it was cushioning the asset, and removing it makes the total more volatile.
2. Why your home currency changes the answer
Campbell, Serfaty-de Medeiros and Viceira (2010) showed that from 1975 to 2005 the US dollar, the euro and the Swiss franc moved against world equity markets. For a risk-minimising equity investor, those currencies were attractive to hold despite their low average returns.
Flip the perspective. For someone who lives in a commodity currency, the US dollar tends to rise exactly when stocks fall. In Rational Reminder episode 379, Ben Felix and Dan Bortolotti make this point for Canadians and Australians: in market turmoil investors flock to the US dollar, so being unhedged helps a Canadian in a way it does not help an American.
Hedge ratio explorer
Three numbers decide how much hedging lowers risk: how volatile the asset is, how volatile the currency is, and how they move together. Pick a starting point, then move the sliders.
Measured on 321 months (1999-10 → 2026-06): S&P 500 total return in USD and the Central Bank of Chile's observed dollar rate.
Volatility only. Hedging also adds (or subtracts) the interest-rate gap between the two currencies, plus trading costs; those move expected return, not this curve. Try the asset volatility at 5% (a bond fund): the minimum-risk hedge jumps toward 100%.
3. A measured case: the Chilean peso
Over 321 months (1999-10 → 2026-06), monthly S&P 500 returns in dollars and changes in the Chilean observed dollar rate had a correlation of -0.44. With a stock volatility of 15.1% and a currency volatility of 10.3%, the formula gives a minimum-risk hedge of about 35%, the same figure a direct regression on the data returns.
The pattern is not a law: in the early-2025 sell-off the dollar weakened while US stocks fell, and an unhedged Chilean investor lost more in pesos than in dollars. The full episode-by-episode table and a historical simulator are on our Chilean site (in Spanish).
Chile case study on finclaro.cl4. Stocks are not bonds
A high-quality bond fund moves little; a currency can move as much as, or more than, the bond itself. Unhedged, the currency dominates an asset you owned for stability. Campbell and co-authors find that the risk-minimising strategy for a global bond investor is close to a full hedge. In the explorer, set the asset volatility to 5% and watch the minimum-risk point move toward 100%.
5. The hedged share-class trap
A “hedged” label tells you the target currency, not that you are protected. HEFA and DBEF hedge developed-market currencies into US dollars; a UCITS “EUR Hedged” class hedges into euros. For an investor who spends in pesos, rand or rupees, neither removes currency risk: it just swaps which foreign currency you hold.
6. What hedging costs
By covered interest parity, a rolling forward hedge earns roughly your short-term interest rate minus the foreign one. If your rates are higher, hedging adds that gap; if lower, it subtracts it. That is not a forecast of the currency: it is the price of removing it. On top come spreads, fund fees, and the error of hedging a value that changes between rolls.
7. When to hedge more
- • The money has a date and a currency: a house deposit or near-term retirement spending.
- • Your income already moves with the foreign currency (paid in dollars, export sector).
- • The foreign sleeve is bonds.
- • You live in a currency that rises in crises.
- • You can't tolerate the noise. Hedging half is the least-regret compromise discussed in the same Rational Reminder episode.
FAQ
Should I buy currency-hedged ETFs?
It depends on your home currency and the asset. If your currency tends to fall when global stocks fall (common for commodity exporters such as Canada, Australia or Chile), unhedged foreign stocks have historically reduced risk in your currency. If your currency tends to rise in crises, hedging foreign stocks deserves more weight. For foreign bonds, hedging is usually the lower-risk choice.
Does a hedged ETF protect me if I don't live in the US?
Only if it is hedged to your currency. A US-listed currency-hedged ETF hedges the fund's foreign currencies into US dollars; a UCITS 'EUR Hedged' class hedges into euros. If you spend in another currency, you are still exposed to the dollar or the euro.
What does currency hedging cost?
The main cost or gain is the interest-rate gap: by covered interest parity, a rolling forward hedge earns roughly your currency's short rate minus the foreign short rate. On top come spreads, fund fees and the imperfection of hedging a value that changes between rolls.
Why should bonds be hedged but not stocks?
Because currency volatility is large relative to a high-quality bond's volatility. Unhedged, a foreign bond fund behaves largely like a currency position. Campbell, Serfaty-de Medeiros and Viceira (2010) find that the risk-minimising strategy for a global bond investor is close to a full hedge.
Is hedging half a reasonable rule?
It is a least-regret rule rather than an optimum: you are never fully right or fully wrong. In the Chilean-peso data the minimum-volatility hedge for US stocks was about 35%, and volatility was nearly flat between 25% and 50% hedged.
Related tools
Sources & method
- • Campbell, J. Y., Serfaty-de Medeiros, K. & Viceira, L. M. (2010). Global Currency Hedging. Journal of Finance, 65(1), 87–121.
- • Rational Reminder, Episode 379: AMA #9 (Ben Felix & Dan Bortolotti, 16 Oct 2025).
- • Chilean-peso figures: FinClaro analysis of month-end S&P 500 total return (S&P Dow Jones Indices / Vanguard VOO) and the Banco Central de Chile observed dollar rate.
- • The explorer uses the two-factor variance formula with a monthly rolling hedge; it ignores the cross term, costs and the interest-rate gap, which affect returns more than volatility. Illustrative presets are not estimates for any currency.
Educational content, not investment advice. Past correlations do not guarantee future ones.