What Is a Carry Trade and Why Do Carry Trades Unwind?

"Carry trade" gets blamed for every sudden market drop that involves the yen. The idea itself is simple; the danger lies in how many people do it at the same time.

What people on X are asking

In November 2025 one user asked an AI assistant on X to explain what the yen carry trade is and how connected Japan is to other markets, after a post predicting an unwind once the Bank of Japan hikes. Another user shared a video headline asking whether the multi-trillion-dollar yen carry trade unwind is here. The size claims in such headlines are hard to verify; the BIS has said the true size of carry positions is difficult to measure. In November 2026 someone asked what a reverse carry trade is, which we cover at the end.

The fact-checked answer

The basic trade. Suppose short-term rates are near 0.5% in Japan and near 3.9% in the US (the effective federal funds rate was 3.88% on November 6, 2026). A trader who sells yen and buys dollars earns roughly the difference, about 3.4% a year on the position, paid through the broker's daily swap. With leverage the percentage on the margin is much larger, which is the appeal.

The catch. The exchange rate can move far more than the interest gap. If the yen strengthens 3.4% against the dollar, one year of carry is gone. If it strengthens 10% in a few weeks, a leveraged position can be wiped out.

Worked example: one year of USD/JPY carry on a $100,000 position

Illustration by UXS with round numbers. Real swap rates are set by brokers and include a markup; they change as central banks move rates. Tap a column header to sort.

Scenario	Interest earned (about 3.4%)	Currency move	Result before costs
Rate unchanged	+$3,400	0%	+$3,400
Dollar up 5% vs yen	+$3,400	+$5,000	+$8,400
Yen up 3.4%	+$3,400	−$3,400	about $0
Yen up 10%	+$3,400	−$10,000	−$6,600

What happened in August 2024. The Bank of Japan raised its policy rate on July 31, 2024, and weak US jobs data on August 2 raised expectations of Fed cuts, both of which narrowed the expected rate gap. Positions financed in yen were cut quickly. FRED data show USD/JPY at 153.72 on July 30 and 143.95 on August 5, a 6.4% drop in four trading days, and the Nikkei 225 falling from 35,909.70 to 31,458.42 on August 5, a 12.4% one-day decline. The BIS later described the episode as a carry-trade unwind amplified by leverage and crowded positioning. Markets recovered much of the move within weeks.

UXS decision diagram

Is a carry trade likely to work, or to unwind?

Text version of the diagram

1. Is the interest-rate gap stable or widening? If no: Gap narrowing: carry is losing support
2. Is market volatility low? If no: High volatility tends to trigger unwinds
3. Is the trade crowded (everyone doing it)? If yes: Crowded exits are violent: cut leverage
4. Is the funding currency's central bank on hold? If no: A hike in the funding currency is the classic trigger
5. Otherwise: Conditions favour carry, but size for a sudden 5–10% currency move

Diagram drawn by UXS. A simplified decision aid for education, not a recommendation.

Why it connects to other markets. Borrowed yen can fund positions in stocks, bonds or other currencies, not just USD/JPY. When the funding gets more expensive or the yen rises, investors may sell those other assets to repay, which spreads the shock. Our page on why the yen is weak shows how the rate gap built up.

Crypto has its own carry-style trade built on funding rates, with very different risks.

Low-yielding havens such as the franc are common funding currencies; see whether the Swiss franc is still a safe haven.

Commodity currencies add an extra driver to rate differentials; see why oil moves the Canadian dollar.

The peso is a classic carry currency; see why the Mexican peso swings so much against the dollar.

Higher rates do not guarantee a stronger currency; see does a rate hike always lift a currency.

Yen-funded carry trades face intervention risk; see how Japan's yen interventions work.

Pegs change carry maths; see how the HKD peg to the US dollar works.

High interest rates often come with high inflation; see does higher inflation weaken or strengthen a currency.

Decision helper

Checklist

1. Calculate net carry after the broker's swap markup.
2. Compare one year of carry with a normal one-month currency move.
3. Use low leverage; carry is a slow gain with fast losses.
4. Set a stop based on the currency move, not on the interest earned.
5. Watch the funding central bank more than the target one.
6. Reduce exposure before major policy meetings.

Common mistakes

• Counting the interest but ignoring the currency risk.
• Using maximum leverage because the daily swap looks small.
• Assuming swap rates are fixed; brokers change them often.
• Holding through a funding-currency rate hike.
• Believing unwinds are slow. They tend to happen in days.

FAQ

What is a carry trade in simple terms?

Borrowing cheaply in one currency to hold another that pays more interest, and keeping the difference if exchange rates stay stable.

Why is the yen used for carry trades?

Japan kept interest rates near or below zero for many years, making the yen one of the cheapest currencies to borrow.

What is a carry trade unwind?

Many investors closing carry positions at once, buying back the funding currency. That makes it rise sharply and can force selling in other markets.

What is a reverse carry trade?

Holding the low-yield currency against a high-yield one, paying the interest gap. People do it when they expect the funding currency to jump, for example as a hedge against an unwind.

Can retail forex traders do carry trades?

Yes; holding a position overnight earns or pays swap. In the US, leverage on majors is capped at 50:1, and swap rates include broker markups.

Did the August 2024 unwind cause a crash?

It caused a sharp, short shock: the Nikkei 225 fell 12.4% on August 5, 2024 and the VIX spiked, but much of the move was reversed within weeks. See what a VIX spike means.