Currency-Hedged vs Unhedged International ETFs

A U.S. investor buying an unhedged international ETF gets two bets: one on foreign stock prices and one on the foreign currency’s strength. A currency-hedged international ETF strips out the currency bet and leaves only the stock price bet—but the hedge itself has a cost that can eat returns, and it only makes sense if you believe currencies will weaken.

The Currency Exposure Problem

When a U.S. investor buys an international ETF holding European stocks, two things must happen for a profit to materialize.

First, the stock price must rise in euros. Second, the euro must strengthen against the U.S. dollar. If a German stock rises 10% in euros and the euro also rises 10% against the dollar, a U.S. investor enjoys roughly 20% total return (ignoring compounding). But if the stock rises 10% in euros and the euro falls 10% against the dollar, the two moves cancel, and the U.S. investor breaks even.

This two-layer structure is the essence of international investing. You are betting on the foreign market’s stocks and on the foreign currency. Most investors focus on the stock part and ignore the currency part. But currency moves are often large and volatile. In extreme years, currency volatility can dominate stock returns.

From 2011 to 2012, European stocks rose modestly, but the euro weakened sharply against the dollar. A U.S. investor in an unhedged European equity ETF experienced negative total returns despite rising stock prices. Conversely, from 2014 to 2015, the euro weakened again, hurting unhedged European exposure. But from 2016 to 2017, the euro strengthened, and unhedged European ETFs benefited from both stock gains and currency appreciation.

How Currency Hedging Works

Currency hedging uses forward contracts or swaps to lock in an exchange rate. A fund manager holding euros but managing a U.S. dollar-denominated ETF enters a forward contract to sell euros at a fixed rate on a future date.

Here is a simplified example:

• Today: 1 euro = $1.10
• A fund holds €1 million of German stocks
• The fund manager enters a forward contract to sell €1 million at $1.10 in three months
• Three months later: 1 euro = $1.00 (euro weakens)
• Without the hedge, the €1 million would be worth $1.00 million (a loss of $100,000 in dollar terms)
• With the hedge, the fund locks in the $1.10 million sale price, avoiding the $100,000 loss

The hedge eliminated the currency risk. The fund’s return now depends only on whether the German stock prices rose or fell in euros—the currency move is irrelevant.

The Cost of Hedging

Hedging does not come free. Three costs apply:

1. Forward rate bias. The forward rate is not equal to the spot rate. Currencies with higher interest rates trade at a forward discount (the forwards are cheaper). If the U.S. interest rate exceeds the euro rate, the forward contract locks in a slightly worse euro-to-dollar exchange rate than the spot rate. Over a year, this cost compounds. A fund might pay 20–40 basis points (0.2%–0.4%) annually just to maintain the hedge.

2. Rebalancing costs. Currency hedges must be rolled over as they mature. Rolling a hedge involves selling the maturing contract and buying a new one, which incurs transaction costs—bid-ask spreads, commissions, slippage. For large funds, this might be small, but it still erodes returns.

3. Opportunity cost. If the foreign currency strengthens, the hedge is a drag. You locked in a lower exchange rate, so you miss the upside of a stronger currency. Over the long term, currencies are unpredictable, but in years when your foreign currency strengthens, the hedge costs you gains.

Worked Example: The Hedge in Action

Suppose a U.S. investor is choosing between:

• Unhedged European ETF: Holds €100 million of European stocks
• Hedged European ETF: Holds the same €100 million but hedged against currency moves

Scenario 1: Stocks rise, euro strengthens

• European stocks rise 8% (in euros)
• Euro strengthens from $1.10 to $1.20
• Unhedged return: 8% stock gain + ~9% currency gain = ~17% total
• Hedged return: 8% stock gain – 0.3% hedging cost = ~7.7% total
• Unhedged wins by ~9% because the currency hedging locked in a lower rate

Scenario 2: Stocks rise, euro weakens

• European stocks rise 8% (in euros)
• Euro weakens from $1.10 to $1.00
• Unhedged return: 8% stock gain – ~9% currency loss = ~-1% total
• Hedged return: 8% stock gain – 0.3% hedging cost = ~7.7% total
• Hedged wins by ~8.7% because the hedge protected against currency decline

Scenario 3: Stocks fall, euro strengthens

• European stocks fall 5% (in euros)
• Euro strengthens from $1.10 to $1.20
• Unhedged return: -5% stock loss + ~9% currency gain = ~4% total
• Hedged return: -5% stock loss – 0.3% hedging cost = ~-5.3% total
• Unhedged wins by ~9% because currency strength offset stock weakness

These scenarios reveal the hedge’s asymmetry. Hedging always costs roughly 0.3% annually (the forward rate bias and roll costs). The hedge only outperforms if the currency weakens enough to offset its cost. If the currency strengthens or stays flat, the hedge is a net drag.

Which Approach Is Right?

Choose hedged if:

• You believe the foreign currency will weaken (or you want to avoid that risk)
• You only care about stock-picking performance in the foreign market, not currency timing
• You are risk-averse and want to eliminate a major source of volatility
• You have a short time horizon (less than 5 years) and cannot tolerate currency swings

Choose unhedged if:

• You are comfortable with currency volatility
• You have a long time horizon (10+ years) and can ride out currency swings
• You believe the foreign currency will stay stable or strengthen
• You want to simplify and avoid paying 20–40 bps for the hedge
• You want natural diversification; currency moves often offset stock moves in ways that reduce overall portfolio volatility

The Unpredictability Problem

The deepest issue is that currency movements are unpredictable. Academic research shows that forward exchange rates are poor predictors of future spot rates. The interest rate differential drives the forward price, but actual currency moves are driven by trade flows, capital flows, policy surprises, and sentiment—which are themselves volatile and hard to forecast.

Over long horizons (10+ years), currency movements tend to revert to levels implied by purchasing power parity, but the interim path is noisy. This unpredictability means the hedge is a costly insurance premium on an outcome that is roughly coin-flip to predict. Most long-term international investors come out ahead without hedging simply because the 20–40 bps annual cost eventually outweighs the protection.

Shorter-term investors, especially those who specifically want to isolate stock-picking talent from currency movements, benefit more from hedging. Professional managers who believe they can pick foreign stocks but not currencies often use hedging to make their stock-picking case cleaner.

See also