Trump says US-Japan yen intervention was a signal of friendship as crypto traders watch the carry trade
Key Takeaways
- •The United States and Japan conducted their first coordinated foreign exchange intervention since 2011, deploying an estimated ¥8.45 trillion or roughly $53 billion to support the yen after it reached a four-decade low against the dollar.
- •The coordinated action drove USD/JPY from approximately 164 down to the 156-157 range, and officials from both nations signaled that further measures could be taken against disorderly currency movements.
- •The yen's extended weakness throughout 2026 has been driven primarily by wide interest rate differentials, as Japan has maintained relatively low rates compared to the United States.
- •Sustained yen appreciation from continued coordinated intervention could trigger carry-trade unwinding, forcing traders to sell risk assets including cryptocurrencies to cover yen-denominated borrowings.
- •Market participants are closely watching the USD/JPY 155 level, where a break below would suggest lasting intervention effects and could accelerate deleveraging across both crypto and equity markets.
The US and Japan coordinated in the currency market for the first time in 15 years, according to President Donald Trump, who said the US Treasury worked with Japan on a large yen-buying intervention on July 31 and described it as a “signal of friendship” with Tokyo. The yen had fallen to a 40-year low against the dollar, and the two governments moved to support the currency.
Japanese authorities estimated the operation at about ¥8.45 trillion, or roughly $53 billion. In the wake of the intervention, USD/JPY fell from near 164 to the 156-157 range.
What happened and why it matters
Coordinated currency interventions are uncommon. The last joint action by the US and Japan in foreign exchange markets came in 2011, when the yen was surging after the Fukushima disaster and both countries sought to prevent a deflationary spiral in Japan. This time, the issue was the opposite: the yen was too weak rather than too strong. Japan has intervened unilaterally multiple times in recent years — in 2022 and again in 2024 — spending tens of billions of dollars with only temporary effect. US participation in a coordinated operation signals a level of commitment that unilateral moves typically cannot match, which is why markets tend to take joint actions more seriously.
The yen’s decline through 2026 has been driven largely by interest rate differentials. Japan has kept rates relatively low compared with the US, making the dollar more attractive to yield-seeking capital. That gap helped drive a prolonged sell-off in the yen and pushed it to levels not seen since the mid-1980s.
Japanese Finance Minister Satsuki Katayama confirmed the intervention and indicated that further action could follow. US Treasury Secretary Scott Bessent made a similar point, saying additional measures would be considered against “disorderly” market movements.
Trump described the move as geopolitically constructive and said it would bring financial benefits for both the US and the global economy. The relationship between the US under Trump and Japan under Prime Minister Sanae Takaichi is being described as entering a new phase, with currency coordination serving as part of the diplomatic relationship.
The carry trade risk for crypto
The yen is one of the most heavily traded currencies in the world, and the yen carry trade, in which traders borrow cheap yen to invest in higher-yielding assets elsewhere, has long been one of the most widely used trades in global finance. The strategy spans equities, sovereign bonds, emerging-market debt, and increasingly crypto. When the yen strengthens abruptly, those positions come under pressure. Traders often unwind them by selling risk assets to repay yen-denominated borrowing.
That dynamic is familiar to crypto markets. In August 2024, a Bank of Japan rate hike on July 31 — the same date as this year’s coordinated intervention — triggered rapid yen strengthening that contributed to a sharp Bitcoin sell-off and a broader global market rout. The link between carry-trade unwinds and crypto volatility is therefore not theoretical; it has already played out in real time.
This latest intervention, which moved USD/JPY by roughly eight points in a short period, has revived those concerns. If the US and Japan continue supporting the yen through coordinated purchases, the carry trade becomes riskier. Traders borrowing yen to buy Bitcoin or other crypto assets could face losses if the funding currency appreciates, potentially squeezing returns or forcing liquidations.
What investors are watching
Bessent’s comment about responding to “disorderly” movements cuts both ways. It suggests that the US is unlikely to allow the yen to collapse, but it also implies some tolerance for orderly depreciation.
USD/JPY near the 155 level is a key area to watch. A break below that level would suggest the intervention is having lasting effects and could accelerate carry-trade unwinding. Bitcoin’s correlation with risk assets remains elevated in 2026, which means a broader deleveraging event driven by yen moves could weigh on crypto alongside equities.
The fundamental pressure on the yen has not disappeared. Interest rate differentials between the US and Japan remain wide, so the intervention addresses the symptom rather than the underlying cause. Unless the Bank of Japan raises rates meaningfully or the Federal Reserve cuts rates, the underlying force pushing USD/JPY higher remains in place.
