Last updated: October 17, 2026
- How a carry trade works
- Carry trade example
- Why carry trades unwind suddenly
- Risks and limitations
- Carry trade vs arbitrage
- FAQ
- Related terms
How a carry trade works
The classic version is in foreign exchange. A trader borrows (or sells) a currency with a low interest rate, the funding currency, and buys a currency with a higher rate, the target currency. The position earns the interest-rate differential every day it is held. Traders often implement this with forward contracts or currency futures, whose prices embed the rate differential.
The idea also applies beyond currencies, for example borrowing short-term to hold a longer-term bond with a higher yield.
Carry trade example
Suppose Currency A has a 1% interest rate and Currency B has a 5% rate. A fund borrows the equivalent of $1 million in Currency A and converts it into Currency B deposits. Over one year, it earns roughly 4%, or about $40,000 before costs, provided the exchange rate does not move.
Now suppose Currency B falls 6% against Currency A. The currency loss of about $60,000 wipes out the carry and leaves a net loss. If the fund used leverage of five times, both the carry and the currency swings are magnified accordingly.
Why carry trades unwind suddenly
Carry trades tend to earn small, steady returns in calm markets and suffer sharp losses in stressed ones. When fear rises, investors rush to close positions at the same time, buying back the funding currency. That can push the funding currency sharply higher and force further selling, a feedback loop that may spill into stocks and other risky assets. Sudden jumps in volatility, changes in central bank policy, or a shift in inflation expectations are common triggers.
Risks and limitations
- Exchange-rate risk can overwhelm the interest differential.
- Interest-rate risk: the differential can narrow if central banks change course.
- Funding and margin call risk when leveraged positions move against the trader.
- Crowding: popular trades can exit all at once, hurting liquidity.
Carry trades are mainly used by professional traders and funds rather than long-term stock investors.
Carry trade vs arbitrage
A carry trade is sometimes confused with arbitrage, but the two differ in an important way. True arbitrage aims to lock in a nearly riskless profit from a price discrepancy, often by hedging away the currency exposure. A carry trade deliberately leaves the exchange-rate exposure unhedged, because hedging it with forwards would largely remove the interest differential. In other words, the carry trader is being paid to bear currency risk. That is why academic studies describe the carry return as compensation for crash risk rather than free money. Understanding this distinction helps explain why carry strategies can look attractive for long stretches and then give back gains very quickly.
Frequently asked questions
Why is the carry trade risky?
Its steady interest gains can be erased quickly by an adverse move in exchange rates, and leverage magnifies those losses.
What is a carry trade unwind?
An unwind happens when many traders close carry positions at once, buying back the funding currency and selling higher-yielding assets, which can trigger sharp market moves.
Related terms
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For information only, not investment advice. See the disclaimer.