Carry traders reload yen shorts as $87B intervention fades

The historic joint U.S.-Japan currency intervention that shook foreign exchange markets at the end of July is already losing its grip. Less than two weeks after authorities deployed an estimated $87 billion to defend the yen, the currency has retraced half its gains and is drifting back toward 160 per dollar, with carry traders treating each official defense as a fresh opportunity to sell.

Hedge Funds Cut Shorts, Then Reload

Commodity Futures Trading Commission data released Friday showed that leveraged funds' short bets on the yen declined 6.5% to 59,526 contracts in the week ended August 11, meaning funds have more than halved their bearish positioning since the coordinated intervention around the turn of the month. But the reduction has not translated into lasting yen strength. USD/JPY traded near 159.50 on Thursday, sitting almost exactly at the midpoint between the pre-intervention peak just short of 164 and the post-intervention low above 155.bloomberg+1

Goldman Sachs ↘ 0.31% strategist Karen Reichgut Fishman wrote in a report that "yen carry positions have been reduced, but are far from over." State Street ↗ 1.00% data shows real money accounts continue selling yen against a basket of G-10 currencies, with the Australian dollar, euro, and U.S. dollar drawing the most interest.news.futunn

Intervention as Entry Point

The pattern troubling policymakers is clear: official buying compresses shorts, the yen rallies briefly, and traders re-enter at better levels. Ashwin Binwani, founder of Alpha Binwani Capital, said he bought USD/JPY near 157 after the intervention. "Intervention provides an excellent opportunity to sell the yen at higher prices," he said. "The carry trade is too tempting to miss."news.futunn

Estimates suggest Tokyo spent approximately $34 billion on July 31 and an estimated $53 billion the prior day alongside the U.S. Treasury — what would be the largest single-day intervention on record if confirmed. The second leg marked the first joint yen-buying operation with Washington since 1998. Yet the yen is on track for its worst weekly performance against the dollar since mid-May.nai500+1

The Rate Gap Holds the Key

The fundamental driver remains Japan's 1% policy rate against most developed-world peers, leaving a yield differential wide enough to compensate traders for intervention risk. With the 10-year U.S. Treasury yield near 4.69% and Japanese government bonds around 2.85%, the roughly 184-basis-point gap continues to argue for yen-funded trades.nai500

The next focal point is the Bank of Japan's September meeting. Bloomberg reported that Prime Minister Sanae Takaichi's government supports a near-term rate hike, possibly in September or October. Yuxuan Tang, head of Asia rates and FX strategy at JPMorgan ↘ 0.07% Private Bank, warned that "unless we see a meaningful downward turnaround in the U.S. dollar and U.S. Treasury yields, carry traders may push the currency pair to retest 162."news.futunn

As Fidelity International portfolio manager George Evstathopoulos put it: "As long as the Bank of Japan remains behind the curve, yen-funded carry trades will continue to thrive."news.futunn