Buy a fund holding Japanese equities and you have made two bets: on Japanese companies, and on the yen against your own currency. Both affect your return, and only one of them was probably deliberate.
Currency hedging removes the second. Whether you should depends heavily on what the fund holds, and the answer is genuinely different for equities and bonds.
What changed in 2026
- Hedged share classes became widely available. Most large international funds offered both hedged and unhedged versions.
- The bond hedging consensus solidified. Hedging international bond exposure became close to standard advice.
- Hedging costs moved with rate differentials. Divergence in policy rates made hedging noticeably more or less expensive depending on the currency pair.
- Equity hedging stayed contested. Whether to hedge international equities remained a genuine open question.
Two different situations
The distinction that resolves most of the question.
International bonds. Bond returns are relatively modest and predictable. Currency movements are volatile — frequently more volatile than the bonds themselves. An unhedged international bond fund is substantially a currency bet with some bond return attached, which is almost never what someone buying bonds wanted.
Bonds are held for stability and diversification. Adding a volatile currency exposure defeats both purposes. This is why hedging international bonds is close to standard advice.
International equities. Equity returns are large and volatile in their own right. Currency movement is meaningful and a smaller share of total variability. There is also a partial natural offset: currencies and equity markets sometimes move in ways that dampen each other, though inconsistently.
|
International bonds |
International equities |
| Asset volatility |
Low |
High |
| Currency volatility relative to asset |
Can exceed it |
Smaller share |
| Purpose of holding |
Stability |
Growth |
| Hedging consensus |
Generally yes |
Contested |
What hedging costs
Not a fixed fee. The cost of hedging reflects the interest rate differential between the two currencies.
Hedging a currency with lower interest rates than yours generally produces a positive carry — you are effectively paid. Hedging one with higher rates generally costs.
That means hedging cost varies over time and by currency pair, sometimes substantially. A hedge that was cheap when policy rates converged becomes expensive when they diverge.
There is also an operational cost — the fund runs a rolling hedging programme with its own transaction costs — which appears in the expense ratio or in tracking difference.
The practical implication: hedging is not free, the cost is not constant, and comparing hedged and unhedged share classes over a single period tells you as much about the rate environment then as about the merits of hedging.
Deciding
International bonds: hedge, in most cases. The currency volatility overwhelms what you are holding the bonds for.
International equities: either is defensible. Unhedged means accepting currency volatility for the possibility of diversification benefit; hedged means paying a cost to isolate the equity return. Many long-term investors hold unhedged equities on the grounds that currency movements tend to be less directional over very long periods and the hedge cost is certain while the benefit is not.
A small international allocation: the decision matters less. Hedging a modest slice of the portfolio adds complexity for a small effect.
Near-term spending needs: if you will convert to your home currency soon, currency risk is real and immediate, which argues for hedging regardless of asset class.
One consistency point: a fund's currency exposure is separate from where its companies operate. A domestic company earning most of its revenue abroad carries currency exposure your home-market fund does not hedge, so your true exposure is rarely what the labels suggest.
Common mistakes
- Leaving international bonds unhedged. Currency volatility overwhelms bond returns.
- Assuming hedging is free. The cost varies with rate differentials.
- Comparing hedged and unhedged over one period. Reflects that period's rates.
- Hedging a very small allocation. Complexity without meaningful effect.
- Assuming a domestic fund has no currency exposure. Companies earn abroad.
- Switching between hedged and unhedged based on recent currency moves. Timing currencies is not more achievable than timing anything else.
- Ignoring the tax treatment. Hedging gains and losses may be treated differently.
FAQ
Does hedging reduce returns?
It reduces volatility from currency movement and costs the hedge. Whether returns are higher or lower depends on which way the currency moved, which is unknowable in advance — that unpredictability is the argument for hedging where the exposure is unwanted.
What about emerging market currencies?
Hedging is frequently more expensive there due to larger rate differentials, and the currency volatility is higher too. Many funds leave emerging market currency exposure unhedged for cost reasons.
Should I hedge if I might move abroad?
Then your future spending currency is uncertain, which changes the calculation. Holding some exposure to the currency you may eventually spend in is defensible.
Does this apply to a global index fund?
Yes — it holds foreign currencies proportionally. Check whether your fund is hedged; many broad global funds are not.
Where to go next
For the fixed-income characteristics hedging protects, read duration risk. For other diversifying assets and their edges, commodities in a portfolio, and for placement decisions, asset location vs asset allocation.
This is general information, not investment advice.