How Currency Risk Affects Your International Investments

Meta description: Currency risk can amplify or erase your international investment returns — even when you pick the right stock. Here's how exchange rates work against you, and what to do about it.

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You did everything right. You researched a European industrial company, analyzed the financials, determined it was trading at a meaningful discount to intrinsic value, and bought shares. Over the next twelve months, the stock appreciated 12% in euros. You opened your brokerage account expecting to celebrate — and found a 2% gain in US dollars.

What happened? Currency risk happened. And for many investors dipping their toes into international markets for the first time, it's the surprise that stings most.

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⚠️ Disclaimer: This article is for informational and educational purposes only. Nothing here constitutes financial, investment, tax, or legal advice. All investing involves risk, including the possible loss of principal. Currency markets are volatile and unpredictable. International investments expose you to exchange rate fluctuations that can significantly affect returns. Consult a qualified financial advisor before making any investment decisions.

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The Hidden Layer of International Returns

When a US investor buys shares of a foreign company, they're making two simultaneous bets:

1. That the company's stock will increase in value (denominated in the local currency)
2. That the local currency won't depreciate significantly against the US dollar

Both bets have to work reasonably well for you to come out ahead in dollar terms. The stock can rise, and you can still lose money. The stock can fall, and you can still make money. Currency fluctuations run parallel to stock movements and interact with them in ways that are often counterintuitive.

This is what finance professionals call currency risk — also called exchange rate risk or foreign exchange (FX) risk. It's the risk that changes in the relative value of currencies will affect the dollar-denominated return on your international investments.

A Simple Example

Say you invest $10,000 in a Japanese company when the exchange rate is 150 yen per dollar. That converts to ¥1,500,000 worth of stock.

Over the next year, the stock rises 10% in yen terms. Your position is now worth ¥1,650,000. Good news.

But now suppose the yen has weakened — the exchange rate has moved to 165 yen per dollar. When you convert back:

¥1,650,000 ÷ 165 = $10,000 exactly

You picked the right stock. The stock went up 10%. And you made exactly nothing in dollar terms, because the currency moved against you by a similar magnitude.

Flip it around: if the yen had strengthened to 135 yen per dollar, your ¥1,650,000 would convert to roughly $12,222 — a 22% gain in dollar terms from a stock that only rose 10% in local terms. Currency can work powerfully in your favor too.

The point isn't that currency risk is always bad — it's that it's a real variable you cannot ignore.

What Drives Currency Movements?

Currency exchange rates are driven by an interconnected web of factors:

Interest rate differentials. Countries with higher interest rates tend to attract capital, which supports their currency. When the Federal Reserve raises rates aggressively while other central banks hold steady, the dollar tends to strengthen relative to those currencies.

Inflation differentials. Higher inflation in one country tends to erode that currency's purchasing power over time, leading to depreciation. Countries with structurally high inflation — common in some emerging markets — tend to see persistent currency weakness.

Economic growth and trade balance. A country running large trade surpluses (exporting more than it imports) tends to see currency inflows that support exchange rates. Economic weakness can trigger capital outflows and currency depreciation.

Political stability and risk sentiment. During periods of global uncertainty, investors often flock to "safe haven" currencies like the US dollar, Swiss franc, or Japanese yen. This can dramatically shift exchange rates in short timeframes.

No model reliably predicts short-term currency movements. This is part of why experienced investors treat currency as a risk to manage rather than a factor to forecast.

How Currency Risk Shows Up Differently by Market

In developed markets (Europe, Japan, Australia), currencies are generally more stable than in emerging markets, but exchange rate moves can still be significant over multi-year periods. The euro-dollar and yen-dollar relationships in particular have shown substantial multi-year trends driven by monetary policy divergence.

In emerging markets, currency risk is amplified. Countries like Brazil, Turkey, and Argentina have experienced dramatic currency devaluations that devastated dollar-denominated returns even when local stock markets were nominally rising. In some periods, Brazilian stocks gained 40% in local terms while delivering near-zero or negative returns to US dollar investors after currency depreciation.

For emerging market investments, assessing the currency backdrop is part of the fundamental research — not an afterthought.

Hedged vs. Unhedged ETFs: The Key Distinction

When building international exposure through ETFs, you'll frequently encounter two versions of similar funds:

Unhedged ETFs give you full exposure to both the foreign stocks and the foreign currency. Your returns will rise or fall based on both stock performance and currency movements. This is more common and generally lower cost.

Currency-hedged ETFs use derivatives (typically forward contracts) to neutralize the impact of exchange rate fluctuations. If the foreign currency weakens, the hedge offsets that loss. If the foreign currency strengthens, the hedge offsets that gain too. You're left with something closer to the "pure" local-currency stock return.

Hedging isn't free — it costs money to run, and the cost varies based on interest rate differentials between countries. When US interest rates are significantly higher than foreign rates, hedging can be expensive, effectively reducing returns.

Which is better? It depends on your view of currencies and your time horizon. Many long-term, buy-and-hold investors prefer unhedged funds on the theory that currency fluctuations even out over long periods and hedging costs reduce compounding over time. Investors with shorter time horizons or specific concerns about currency headwinds may prefer hedged versions for a particular market.

Understanding which type you own matters — and many investors don't check.

The Value Investor's Approach to Currency Risk

Value investors typically approach currency risk the same way they approach other risks: acknowledge it, try to avoid unnecessary concentration, and don't let it paralyze good decisions.

A few practical principles:

Don't let currency tail wag the investment dog. If you've identified a genuinely undervalued business, a modest currency headwind shouldn't automatically kill the investment thesis. A 30–40% margin of safety in valuation is more powerful than any short-term currency move.

Be more cautious in high-inflation emerging markets. Persistent inflation differentials create persistent currency depreciation pressure. Countries with structurally high inflation require you to factor in ongoing currency erosion as part of the valuation analysis.

Diversify across currencies. Just as you diversify across industries and geographies for stock-specific risk, holding international exposure across multiple currencies (euros, yen, emerging-market currencies) reduces the impact of any single exchange rate move.

Use the screener to start with fundamentals. The Value of Stock Screener helps you identify companies with compelling price-to-earnings, price-to-book, and free cash flow metrics. A company that appears cheap on fundamentals gives you more buffer to absorb currency headwinds than one purchased at full valuation.

Practical Steps for Managing Currency Risk

• Understand what currency exposure you already have. Even in your US stocks, large multinationals earn significant revenue abroad — you have more FX exposure than you may realize.
• Check whether your international ETF is hedged or unhedged. The fund name or prospectus will tell you.
• Size international positions thoughtfully. Currency risk is a reason to diversify international exposure across multiple regions rather than concentrating in one.
• Consider your time horizon. Short-term investors face more currency timing risk; long-term investors have more opportunity for currency moves to normalize.

Currency risk won't stop a great international investment from working out over a long time horizon. But understanding it clearly is the difference between a surprise and a calculated risk — and value investors prefer calculated risks.

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Actionable Takeaways

• Currency risk is the hidden layer of international investing — a stock can rise in local terms and still deliver flat or negative dollar returns if the currency weakens.
• Emerging markets carry higher currency risk than developed markets, often due to higher inflation and political instability.
• Hedged ETFs neutralize currency movements; unhedged ETFs expose you to both stock performance and exchange rate changes — know which you own.
• Hedging has a cost that varies with interest rate differentials between countries; long-term investors often prefer unhedged exposure on a cost-adjusted basis.
• A strong fundamental margin of safety (buying below intrinsic value) gives you a buffer against currency headwinds that a fully-priced stock doesn't offer.

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This article is for educational purposes only and does not constitute investment advice. Currency markets are highly unpredictable and exchange rate movements can significantly impact international investment returns in both positive and negative directions. Past performance is not indicative of future results. Always consult a qualified financial professional before making investment decisions.

— Harper Banks, financial writer covering value investing and personal finance.