Hedge funds slash yen short bets after US-Japan intervention

Hedge funds sharply reduced their bearish wagers against the Japanese yen following a rare coordinated intervention by the United States and Japan, easing fears of an imminent repeat of the market turmoil that rocked global assets in mid-2024.

Positions Cut by Half

Leveraged funds cut their net short yen positions by roughly half to 63,600 contracts as of August 4, according to Commodity Futures Trading Commission data released Friday. That marked a steep retreat from nearly 138,000 contracts at the end of June, which had represented the largest net short position since 2007. The pullback came after Washington and Tokyo executed their first joint yen-buying intervention since 1998, pushing the dollar-yen rate from near 164 — a fresh 40-year low — down into the mid-157 range within days.bloomberg+2

The Federal Reserve Bank of New York sold dollars and bought yen on July 31 on behalf of the U.S. Treasury, while the Bank of Japan bought yen over two consecutive sessions. According to BBC News, a Reuters photograph of a notepad in front of Treasury Secretary Scott Bessent during a cabinet meeting read: "To Do: Buy Japanese Yen $5-10 bil". Japan's own intervention totaled roughly 13.7 trillion yen, according to estimates from Shinhan Investment & Securities.bbc+1

Why Washington Stepped In

The unusual U.S. participation was driven less by concern for the yen itself than by a desire to protect the Treasury market. Japan holds approximately $1.14 trillion in U.S. government bonds, making it the largest foreign holder. Without coordination, Tokyo would have needed to sell Treasuries to fund unilateral yen defense — a move that could have pushed U.S. yields higher at a sensitive moment. Instead, the two countries are considering expanding the cap on the Fed's FIMA repo facility, which allows foreign central banks to borrow dollars against their Treasury holdings without selling them.cnbc+2

Carry Trade Fears Linger, but With Caveats

The scale of short positioning before the intervention had drawn comparisons to July 2024, when a rapid yen carry trade unwind sent the Nasdaq Composite down 3.4% and South Korea's Kospi tumbling nearly 9%. Goldman Sachs The Goldman Sachs Group, Inc. ↗ 0.68% had called the environment for carry trades "the most favorable in over 20 years" just weeks before the intervention.biz.chosun

Yet analysts at Shinhan Investment & Securities argue the risk of contagion is lower this time. Yen-funded overseas investment liabilities have fallen more than 60 trillion yen from their early-2024 peak, and leverage in Japan's financial system is minimal compared with two years ago. Citigroup ↗ 0.88% strategist Daniel Tobin noted that carry trade funding has diversified into the Swiss franc, euro, and Canadian dollar, reducing the concentration risk that amplified the 2024 shock.biz.chosun

The dollar-yen pair has since retraced about half of its post-intervention decline, trading around 158.4 as of Friday afternoon — a reminder that without structural shifts in interest-rate differentials, intervention effects tend to fade.biz.chosun