Currency-Hedged ETF Share Classes

An investor buying a Japanese-stock ETF priced in dollars is really taking on two separate bets at once: how Japanese stocks perform in yen, and how the yen moves against the dollar. Over any given year, the currency piece can add to or subtract from the stock return by a large amount — sometimes larger than the stock move itself — and not every investor wants that second bet bundled in with the first.

A currency-hedged share class strips out the currency piece using forward contracts: the fund sells the foreign currency forward each month (or quarter) in an amount roughly matching its foreign holdings, so a move in the yen-dollar exchange rate is largely offset by an equal and opposite move in the forward contract. The result is a return that tracks the local-currency performance of the underlying stocks much more closely than the unhedged version does.

This isn't free. Rolling forward contracts every month has a direct trading cost, and more importantly there's an implicit cost or benefit baked into the forward rate itself, driven by the interest-rate differential between the two currencies — hedging the currency exposure of a country with much higher interest rates than the U.S. tends to be a persistent drag, while hedging a lower-rate currency can be a modest tailwind. The hedge is also never perfect: it's sized against the portfolio's value at the start of the hedging period, so if the underlying stocks move a lot before the next rebalance, the hedge briefly under- or over-covers the actual currency exposure.

Whether the hedged or unhedged version is the "right" choice isn't a settled question — it depends on what an investor is actually trying to isolate. Someone who believes the foreign stocks are attractive but has no particular view on the currency, or actively wants to avoid adding a currency bet on top of an equity one, generally prefers the hedged share class. Someone who wants diversification away from their home currency as a deliberate feature, not a side effect, is better served by the unhedged version — the hedge would be actively working against the exposure they wanted in the first place.