1. How could money borrowed in Japan shake global stocks?

The yen carry-trade unwind of 2024/08.

US growth concerns sparked a shock, but economic expectations were not the only factor moving markets.

How investors funded their positions mattered too.

2. Borrow where rates are low, invest where returns are higher

A yen carry trade uses low-interest yen funding to invest in higher-yielding assets denominated in another currency.

Investors can expect a profit when investment returns exceed funding costs.

But an adverse exchange-rate move can erase that profit.

3. When the yen rises, the debt becomes heavier

Imagine borrowing yen to invest in dollar assets.

When the yen strengthens, more dollars are needed to repay the same yen amount. If the investment also falls in price, the pressures compound.

To unwind the trade, sell investment assets and buy yen to repay the debt.

4. When simultaneous selling is scarier than bad news

In early 2024/08, cuts to leveraged positions amplified the negative initial reaction to US economic data.

Falling prices → larger losses → greater collateral pressure → position reductions.

This process can produce selling across different assets.

Investors need not all have turned pessimistic on the same company; they may have needed to reduce risk at the same time.

5. Not every decline was caused by yen carry trades

BIS researchers found that the unwinding of leveraged equity and currency trades amplified the initial shock.

Yet even the total size of yen carry trades is difficult to measure precisely.

Neither attributing every market decline to the yen carry unwind nor declaring the unwind over solely because prices rebounded is justified.

A factor that amplifies a shock is not an explanation for every market move.

6. Does a rebound mean the crisis is over?

Markets subsequently stabilized quickly. But price recovery alone does not establish that company earnings prospects improved.

ASSETCASTING interpretation:

Fewer investors needing to sell and more reasons to buy are different developments.

Ask whether selling pressure has eased, or whether the economic and corporate outlook has improved.

The images are educational editorial graphics, not actual price charts or trading signals. Factual event context is based on the cited BIS analysis; the concluding distinction is ASSETCASTING's interpretation. The artwork is in Korean; the descriptions and text here provide the English version.

BIS Bulletin 90 — The market turbulence and carry trade unwind of August 2024

How yen funding and leveraged position reductions amplified market turbulence—and why a rebound does not prove that all risk has disappeared.

The 2024/08 yen carry-trade unwind: why funding mattered

Sources

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