Currency Exposure Separation
Separate foreign-stock returns from the additional currency bet
- Difficulty
- Moderate
- Time to result
- ~days to results
- Steps
- 6
- Confidence
- 96%
An unhedged international stock fund combines two positions: ownership of foreign companies and exposure to the currencies in which those companies trade. This framework separates them. The investor inventories the portfolio's currency exposures, determines whether each currency position is intentional, and overlays matching currency forwards when the goal is to isolate stock returns. The forwards are periodically rolled and resized as portfolio values change. Costs are evaluated from actual interest-rate differentials rather than from the assumption that every hedge is expensive; in some markets the investor may be paid to hedge. The final decision should consider how currency interacts with local equities because hedging can reduce risk in a broad international portfolio but may increase volatility in markets where stocks and currency move inversely.
Origin
Extracted from Masters in Business through Jeremy Schwartz's explanation of Wisdom Tree's currency-hedged international equity products.
Core principles
- 01Foreign equities and foreign currencies are separate exposures
- 02Currency can dominate modest stock-selection gains
- 03A hedge removes rather than adds an exposure
- 04Hedging costs depend on interest-rate differentials
- 05Currency effects should be evaluated at the portfolio level
How to run it
- 1
Decompose the allocation
List the underlying stock exposures and the currencies attached to them. Treat these as distinct portfolio positions rather than one inseparable investment.
Pro tip Express each currency exposure as a percentage of the total portfolio.
Watch out A geographically diversified stock portfolio can still contain a concentrated currency exposure.
- 2
Define the intended bet
Decide whether the objective is to own foreign businesses, foreign currencies, or both. Hedge only the currency exposure that is not part of the investment thesis.
Pro tip Write the intended exposure in one sentence before selecting a product or derivative.
Watch out Do not add a hedge merely because a currency recently declined.
- 3
Assess risk and cost
Estimate currency volatility, its correlation with the local equity market, and the applicable forward-rate differential. Compare those effects with the expected contribution from the stocks.
Pro tip Check whether the hedge earns or costs carry under current rates.
Watch out Historical hedging costs may not represent current conditions.
- 4
Overlay matching forwards
Use currency forwards sized to neutralize the unwanted exposures while retaining the underlying stocks. A multi-country portfolio requires a set of forwards corresponding to its currency basket.
Pro tip Match the hedge to actual portfolio exposures rather than a generic geographic index.
Watch out Mismatched notionals can leave residual currency bets.
- 5
Roll and rebalance
Renew the forwards periodically and resize them as equity values and currency weights change. Monitor tracking differences and operational execution.
Pro tip A monthly review aligns with the rolling process Schwartz described.
Watch out A stale hedge can become oversized or undersized after large market moves.
- 6
Evaluate portfolio-level effects
Measure whether the hedge improved the portfolio's risk profile and preserved the intended equity exposure. Revisit the decision if correlations or interest-rate differentials change materially.
Pro tip Judge volatility and drawdowns as well as headline return.
Watch out In markets such as Japan, removing currency exposure may increase equity volatility because of inverse stock-currency behavior.
In the wild
An investor wants exposure to Japanese companies but believes yen movements could overwhelm the companies' operating returns. The investor chooses a yen-hedged equity allocation, retaining the stocks while neutralizing the currency. As the yen weakens and exporters' profits improve, the stock exposure remains while the direct yen loss is reduced.
→ The allocation more closely reflects Japanese equity performance rather than a combined stock-and-yen trade.
A developed-market portfolio holds stocks denominated in euros, pounds, yen, and other currencies. The manager calculates each exposure and adds corresponding forwards, rolling them monthly. Current rate differentials show that some hedges cost money while others generate positive carry.
→ The investor obtains a cleaner international equity allocation with a deliberately managed currency-risk budget.
Common mistakes
Calling hedging an extra bet
The unhedged fund already contains the additional currency position. A properly sized hedge removes that exposure rather than adding a new directional view.
Assuming every hedge is expensive
Forward economics vary by interest-rate differential. Some currencies can produce positive carry when hedged.
Ignoring stock-currency correlation
A hedge can affect total volatility differently across markets. Analyze the economic linkage before assuming it will always reduce risk.
Is it for you?
Best for
It is best for investors who want foreign-company exposure but do not have a deliberate view on the associated currencies.
Not ideal for
It is not ideal when currency exposure is intentional, when hedging is unusually costly, or when operational complexity cannot be managed.
From the transcript
“They have the stock bet and the currency additional risk, and the currency moving ten to fifteen percent a year.”
“you have the underlying stock exposures, and then you add a currency forward on top that's designed to neutralize and get you back to just…”
“No, the hedges plane vanilla stock exposure, not stock plust current.”
From the episode
Jeremy Schwartz Discusses Investment After the Financial Crisis