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Carry Trades

What Happens During a Carry Trade Unwind?

Pomegra Learn

What Happens During a Carry Trade Unwind?

A carry trade unwind is the rapid, widespread exit of carry trade positions by multiple traders simultaneously. Unlike an orderly closure of individual positions over time, an unwind is a synchronized stampede. When an unwind occurs, the funding currency (typically the yen, Swiss franc, or dollar) strengthens sharply, bid-ask spreads widen dramatically, and the very currency pairs that were profitable for months or years become toxic. Unwinds are among the most disruptive events in forex markets, often correlating with equity market crashes and causing losses that ripple across asset classes.

Quick definition: A carry trade unwind is a sudden, coordinated exodus by many carry traders from their positions, usually triggered by a rise in risk aversion, unexpected interest rate increases, or a market shock. This mass selling of the higher-yielding currency and buying of the funding currency causes the funding currency to spike and volatility to surge.

Key takeaways​

  • Unwinds are triggered by risk-off events: Market shocks, equity crashes, or economic warnings cause investors to flee risky assets for safe havens
  • The funding currency rallies sharply: When carry traders buy back their funding currency simultaneously, the currency strengthens 5–20% in days or weeks
  • Liquidity evaporates: Bid-ask spreads widen from 1 pip to 20+ pips, and some brokers halt trading altogether
  • Other assets fall alongside currencies: Unwinds often coincide with equity market declines and credit spreads widening
  • Losses are amplified by leverage: Traders using 10:1 or 20:1 leverage face margin calls and forced liquidations
  • Recovery is uneven: Some carry pairs recover quickly; others remain weak for months or years, depending on the underlying economic cause

What triggers a carry trade unwind​

Carry trade unwinds begin with a shift in market sentiment from "risk-on" (pursuing higher yields and returns) to "risk-off" (seeking capital preservation). This shift can originate from multiple sources: a central bank rate hike, a stock market crash, a credit event, geopolitical tension, or an epidemic.

The 2008 financial crisis exemplifies a major unwind. When Lehman Brothers collapsed in September 2008, equity markets worldwide plummeted. Carry traders realized that the environment supporting higher-yielding currencies (growth, rising corporate profits) had vanished. Simultaneously, banks became hesitant to lend, and interbank lending rates spiked. Traders rushed to close carry positions and lock in their yen borrowing at any price. The AUD/JPY, NZD/JPY, and CAD/JPY pairs fell 30–40% in four months.

Similarly, in August 2015, when China unexpectedly devalued the yuan, investors became concerned about a broader slowdown in emerging markets. Risk-averse investors reduced their holdings of higher-yielding emerging market currencies and returned to yen, dollar, and Swiss franc. Carry positions unraveled. A less dramatic example occurred in August 2007, when credit markets first froze: AUD/JPY fell 10% in days as carry traders preemptively exited.

More recently, in September 2023, when bond yields rose sharply due to persistent inflation and Federal Reserve hawkishness, carry trades faced losses from both currency depreciation and the repricing of interest rate expectations. This is a subtler unwind form, where deteriorating returns (as the differential compresses) cause traders to question position viability and gradually exit over weeks rather than days.

The feedback loop: Currency rallying, losses mounting, margin calls triggering​

An unwind creates a self-reinforcing downward spiral. As traders sell the higher-yielding currency (AUD, NZD, etc.) and buy the funding currency (yen), the funding currency strengthens, inflicting losses on remaining carry positions. Those losses reduce traders' available margin. Brokers issue margin calls. Traders are forced to close positions at the worst prices, adding more selling pressure to the higher-yielding currencies and more buying pressure to the funding currency. The cycle accelerates.

During the March 2020 COVID-19 crash, this dynamic played out in real time. On March 9–16, 2020, the yen rallied from 108 to 101 against the USD, roughly a 6.5% move in one week. The AUD fell from 0.67 to 0.56 USD, a 16% drop. Carry traders holding AUD/JPY suffered catastrophic losses. The AUD/JPY pair fell from 75 to 55, a 27% depreciation. Traders with 10:1 leverage lost their entire capital base. This forced them to close positions, accelerating the spiral.

The feedback loop is strongest when leverage is high across the market. If most carry traders use 10:1 or 15:1 leverage, a modest 5% adverse currency move can trigger widespread margin calls, creating a stampede. If leverage is lower, the unwind is more gradual.

Visual representation of unwind dynamics​

The role of margin and leverage in amplifying losses​

Leverage is the amplifier in an unwind. A 5% currency move against you costs 5% of your position value. But with 10:1 leverage, it costs 50% of your capital. With 20:1 leverage, a 5% move wipes you out entirely. During unwinds, when currency moves exceed 10–20% in days, even conservative leverage positions become unprofitable.

Real example: In July 2007, before the full 2008 crisis, a carry trader held a 10 million AUD position (funded in yen) with 2 million AUD of capital (5:1 leverage—conservative for carry traders). The position earned approximately 50,000 AUD per month in interest. Over six months, it accumulated 300,000 AUD in gains, bringing the account to 2.3 million AUD. However, when the AUD fell 20% against the yen in Q4 2008, the position lost 2 million AUD, wiping out the accumulated gains and the original capital. The trader was forced to deposit additional capital or face liquidation.

If the same trader had used 10:1 leverage (1 million AUD capital for a 10 million AUD position), a 10% AUD decline would have destroyed the account entirely, triggering an immediate margin call and forced closure at the worst prices.

Market correlation: Unwinds span multiple currency pairs and asset classes​

Unwinds are not isolated to a single currency pair. When risk-off sentiment spreads, all carry trades unwind in concert. AUD/JPY, NZD/JPY, CAD/JPY, GBP/JPY, and emerging market pairs like BRL/JPY and MXN/JPY all fall simultaneously. The correlation between these pairs approaches 1.0 during unwinds, meaning there is no diversification benefit.

Additionally, carry trade unwinds correlate with equity market selloffs. When the S&P 500 declines 10%, carry currency pairs often fall 5–15%. When the VIX (volatility index) spikes above 30, carry trades universally lose money. This high correlation means that a portfolio combining carry trades with equity holdings experiences amplified losses during the exact moments when losses hurt most—during market stress.

In August 2015, the S&P 500 fell 3.9%, the yen rallied sharply, and carry pairs collapsed. Investors holding a diversified portfolio of equities and carry trades experienced synchronized losses across both segments, a form of "correlation shock" that many risk models failed to predict.

Liquidity evaporation and bid-ask spreads​

In normal markets, the AUD/JPY bid-ask spread is 0.5–2 pips. During an unwind, spreads widen to 10, 20, or even 50 pips. On a 5 million AUD position, a 20-pip spread represents a 100,000 AUD slippage cost—roughly 2% of the position. If you are trying to close during peak stress, you may face executions at even wider spreads or be unable to execute at all.

Some brokers, facing their own capital constraints during unwinds, widen spreads dramatically or stop accepting new orders altogether. A retail trader attempting to close a position may discover that the broker's platform is down, or that quotes are unavailable. This is one of the cruelest aspects of unwinds: the ability to close a losing position vanishes precisely when you most need it.

In March 2020, some currency brokers briefly stopped accepting orders in pairs like AUD/JPY and NZD/JPY. Traders were locked into positions, unable to exit, watching losses mount. When the platform reopened hours later, they faced a cascade of margin calls and forced liquidations.

Determining when an unwind begins and ends​

An unwind typically begins with an external shock (a crash, a rate hike, a geopolitical event) and ends when either:

  1. Carry traders have fully exited: Once all the overleveraged or nervous traders have closed positions, the selling pressure dissipates. This usually takes days to weeks.
  2. The underlying economic concern resolves: If the shock is temporary (e.g., a brief equity rally), risk appetite returns, and carry traders re-enter.
  3. Policy intervention stabilizes markets: Central bank liquidity injections, rate cuts, or government stimulus can restore confidence and halt an unwind.
  4. New traders enter at lower valuations: Opportunistic traders buy the higher-yielding currencies at the depressed levels, absorbing the exit supply.

The 2008 unwind took 4–6 months to fully play out. The March 2020 unwind lasted roughly 2 weeks before equities stabilized and central banks signaled support. The August 2015 unwind was largely complete within days, though volatility remained elevated for weeks.

Real-world examples of major unwinds​

The 2008 Financial Crisis Unwind: Starting September 2008, the AUD/JPY fell from 100 to 60 over four months. Traders with 5:1 leverage lost 60% of capital; those with 10:1 leverage lost 100%+. Banks that had funded carry trades with leverage faced massive losses.

The August 2007 Credit Crunch: The first signs of trouble in subprime mortgages triggered a 10–15% decline in carry pairs over weeks. Traders who closed early avoided the 2008 collapse, but those who held thinking it was temporary were wiped out.

The March 2020 Pandemic Crash: In two weeks, AUD/JPY fell from 68 to 59. Equity markets fell 30%+. The unwind was short but brutal, forcing many overleveraged carry traders into bankruptcy.

August 2015 China Devaluation: The AUD fell 10% against the JPY in days as investors worried about a Chinese hard landing. The move was sharp but brief, lasting about a month.

Common mistakes during unwinds​

  1. Holding to the bitter end: Traders convince themselves that the currency move is temporary and that interest gains will eventually recover losses. Many do not recover, or recovery takes years.
  2. Adding to losing positions: Some traders "average down," depositing more capital to maintain positions. This is often a mistake; the underlying trend may persist.
  3. Ignoring volatility signals: Rising volatility (the VIX, currency option volatility) often precedes unwinds. Traders who ignore these warnings are caught off guard.
  4. Assuming leverage is safe at 5:1: Even moderate leverage becomes dangerous during sharp unwinds. A 10% move wipes out 50% of your capital at 5:1 leverage.
  5. Failing to set stop-losses: Disciplined traders set stop-loss orders before entering carry trades. Those who do not are often forced to close at the worst prices during panic selling.

FAQ​

What percentage of carry traders face margin calls during a typical unwind?​

During a major unwind like 2008 or March 2020, estimates suggest 50–80% of leveraged retail carry traders face margin calls within the first week. Those with the tightest leverage (15:1+) are eliminated first. Those with conservative leverage (3:1 or less) may survive intact.

How long do carry trade unwinds typically last?​

Most unwinds last 2–8 weeks from the initial shock to the stabilization phase. However, the underlying currency weakness can persist for months or years if the economic damage is severe. The 2008 unwind saw months of weakness; the March 2020 unwind largely recovered in 2–3 months.

Can you make money during a carry trade unwind?​

Yes. Traders who anticipated the unwind and shorted the higher-yielding currencies or went long the funding currency (yen, dollar) profit. Additionally, some traders profit from the volatility by trading the daily swings rather than holding directional positions.

Do central banks ever intervene to stop carry trade unwinds?​

Central banks occasionally intervene, but their effectiveness is limited. The Bank of Japan has intervened to slow yen rallies, but with mixed results. More commonly, central banks use communication (forward guidance) to manage expectations, which can stabilize carry trades.

Why do carry trades unwind so quickly if traders are rational?​

Traders are rational individually but often herd collectively. When losses mount, margin calls force positions closed simultaneously, creating a stampede. Additionally, many carry traders use automated stop-losses or margin calls triggered by algorithms, leading to synchronized exits.

Can diversification prevent losses during a carry trade unwind?​

Traditional diversification (holding different carry pairs) provides minimal protection because all carry pairs fall together. Diversification into truly uncorrelated assets (long-duration government bonds, gold) can help, but most investors in carry trades are not diversified.

What is the typical recovery pattern after an unwind?​

Immediately after an unwind, volatility remains high and the funding currency (yen) is overvalued. Over weeks to months, the yen gradually weakens as the initial shock fades and interest rate differentials reassert themselves. Traders who survived the unwind and held some cash often re-enter at lower valuations, gradually stabilizing the pairs.

Summary​

A carry trade unwind is a rapid, coordinated exit by many traders from carry positions, typically triggered by a shift to risk-off sentiment, market shocks, or economic deterioration. During an unwind, the funding currency strengthens sharply, losses mount, margin calls proliferate, and liquidity evaporates. The process is self-reinforcing: losses trigger margin calls, which force liquidations, which accelerate currency moves, which cause more losses. Leverage amplifies these moves, turning a 5% currency shift into a 50–100% loss on capital. Unwinds are among the most disruptive events in currency markets and often coincide with equity market crashes, affecting multiple asset classes simultaneously. Understanding the mechanics of unwinds is essential for any trader considering carry trades.

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