Hedge funds turn net long yen for first time since July 2025 after BOJ rate hike disappoints
Hedge funds turned net long on the Japanese yen for the first time since July 2025, holding ¥251 billion in bullish bets as of September 15, according to CFTC data. The shift followed a joint US-Japan intervention that deployed ¥15.4 trillion and rate hikes by both the Federal Reserve and Bank of Japan. However, the BOJ's dovish forward guidance disappointed markets, causing the yen to fall 1.3% on Friday to near 156.80 per dollar. The BOJ conducted rate checks, a precursor to intervention, as analysts remain divided on the yen's direction.
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Common ground
- Both sides agree that the coordinated $15.4 trillion yen intervention was a real and significant event, signaling a political shift in Japan's tolerance for yen weakness.
- Both acknowledge that the U.S.-Japan interest rate differential remains large at 250-275 basis points, which is a key factor in currency markets.
- Both recognize that hedge funds made a massive 73,000-contract swing from short to long yen, indicating a major positioning change.
- Both agree that the geopolitical dimension of the yen's movement matters more than pure market mechanics.
Points of contention
- Neutral Agent argues the yen rally is a temporary positioning squeeze driven by volatility and momentum, while Eastern Agent insists it's a structural shift signaling the end of dollar dominance.
- Neutral Agent says Japan's intervention was defensive damage control to stop the yen from hitting 170, but Eastern Agent calls it a sovereign declaration of independence from U.S. monetary policy.
- Neutral Agent believes hedge funds will flip back to short yen once the BOJ pauses, while Eastern Agent argues they're betting on a long-term geopolitical realignment.
- Neutral Agent claims Japan's QE was a free choice to fight deflation, but Eastern Agent says it was forced by a dollar-centric system that traps surplus economies.
Blind spots
- Both sides overlook the role of other major currencies like the euro or yuan in the multipolar shift, focusing only on the yen-dollar dynamic.
- Neither fully addresses how domestic Japanese politics or public opinion might constrain the BOJ's future actions beyond market signals.
- The debate ignores the impact of potential U.S. recession or a sudden Fed pivot, which could dramatically alter the carry trade math overnight.
WorldAttention’s read
This debate reveals a fundamental clash between short-term market mechanics and long-term structural change. The yen's recent rally was driven by a massive hedge fund positioning swing and coordinated intervention, but the core U.S.-Japan interest rate gap remains wide. While the geopolitical signal from Japan's intervention is real, it's unclear if this marks a permanent shift away from dollar dominance or just a temporary defense. The hedge funds are likely to profit from volatility in the near term, but the carry trade will persist as long as yield differentials favor it. The multipolar world is emerging slowly, but this single event is more about patching a leak than rebuilding the entire financial system.
Reporting timeline
Rate Hike Fails to Boost Yen; UBS Asset Management Awaits Intervention to Short Again
The Bank of Japan raised its policy rate to 1.25%, the highest in 31 years, but the yen weakened, disappointing markets. Kevin Zhao of UBS Asset Management expects the yen to remain under pressure due to the persistent US-Japan interest rate differential, especially as the Federal Reserve signals further tightening. Zhao plans to use any future Japanese intervention-driven yen rallies as opportunities to re-enter short positions. He previously sold yen after the July 2024 coordinated US-Japan intervention near 164 USD/JPY. Market expectations for another BOJ rate hike by October are below 20%, while December odds are near 90%. Analysts from HSBC and Morgan Stanley MUFG share similar views, noting that intervention can create short-term spikes but not sustained trends. Japan's financial markets are closed for a holiday, raising liquidity concerns and amplifying intervention risks.
Read sourceHedge Funds Turn Bullish on Yen for First Time Since July 2025 as BOJ Raises Rates
Hedge funds have shifted to a net long position on the Japanese yen for the first time since July 2025, according to CFTC data released Friday and reported by Bloomberg. Leveraged traders cleared short positions and built bullish bets worth approximately 251 billion yen ($1.6 billion) during the week ending September 15. The reversal followed interventions by US and Japanese authorities, with US Treasury Secretary Bessent calling US participation 'symbolic' and expressing support for export competitiveness. However, the yen fell up to 1.3% on Friday after the Bank of Japan's forward guidance disappointed some traders expecting further tightening, leaving new long positions vulnerable. The yen traded around 156.80 per dollar late in New York. The Bank of Japan reportedly polled market participants about exchange rate levels, a move seen as a precursor to intervention. Meanwhile, speculative traders reduced net long dollar positions to the lowest since March, though the dollar rebounded strongly this week, posting its largest weekly gain in three months.
Read sourceHedge Funds Turn Bullish on Yen for First Time Since July 2025 as Rate Hikes Boost Volatility
According to the U.S. Commodity Futures Trading Commission (CFTC), hedge funds have turned bullish on the Japanese yen for the first time since July 2025, with net long positions rising to approximately $1.6 billion (251 billion yen). This marks a dramatic reversal from a net short of 53,255 contracts to a net long of 20,069 contracts as of the week ending September 15. The shift coincides with rate hikes by both the Federal Reserve (25 basis points to 3.75%-4.00%) and the Bank of Japan (guiding the overnight call rate to around 1.25%). However, the BOJ's policy signals fell short of some market expectations for clearer future rate hike hints, causing the yen to fall as much as 1.3% against the dollar on Friday, trading near 156.80. The yen's continued pressure has again raised attention on potential Japanese FX intervention, with reports that the BOJ has queried market participants about exchange rates. Asset management firms also increased net long yen positions by 54,179 contracts to 54,821. Meanwhile, speculative funds' overall bullish sentiment on the dollar fell to its lowest since March, though the dollar subsequently recorded its largest weekly gain in about three months, suggesting short-term positioning mismatches.
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Hedge Funds Turn Long Yen for First Time in 14 Months, Signaling Possible Carry Trade Reversal
Hedge funds turned net long on the Japanese yen for the first time in 14 months as of September 15, 2025, according to CFTC data, signaling a potential reversal in the massive yen carry trade. The shift follows joint US-Japan intervention in July-August 2025, where authorities spent a record 15.4 trillion yen ($964 billion) to support the currency. The move came just before both the Federal Reserve and Bank of Japan raised rates in the same week, with the BOJ hiking to 1.25% but delivering a dovish signal that disappointed some expecting a clearer tightening path. After the BOJ decision, the yen weakened past 158 per dollar, prompting a BOJ rate check—a precursor to intervention—which briefly pushed USD/JPY back to the 156 area. Analysts are divided: ING's Chris Turner sees yen weakening to 157-158 if no further BOJ signals, while State Street's崔智旭 expects further BOJ hikes and a 152.5 target. The carry trade basis remains intact with a 250-275 bps US-Japan rate differential, but the scale of speculative short positions has halved from early September, reducing the risk of a 2024-style crash. Japanese investors have been repatriating funds, selling a net 3 trillion yen in foreign bonds year-to-date.
Hedge Funds Turn Bullish on Yen for First Time in 14 Months, Signaling Potential Carry Trade Reversal
According to CFTC data, hedge funds turned net bullish on the yen for the first time since July 2025, holding ¥251 billion in long positions. This shift follows a joint U.S.-Japan intervention that deployed ¥15.4 trillion to support the yen after it fell to 164 per dollar. The Federal Reserve raised rates by 25 basis points to 3.75%-4.00%, and the Bank of Japan raised its policy rate to 1.25%, a 31-year high. BOJ Governor Ueda did not explicitly signal another October hike, disappointing some markets. Strategists are divided: Wells Fargo's Chidu Narayanan recommends shorting the yen, while State Street's Jisoo Choi targets 152.5 USD/JPY in three months. The BOJ conducted rate checks on Friday, interpreted as a warning against further yen depreciation. Analysts note that a 250-275 basis point interest rate differential persists, keeping carry trade foundations intact, but the scale of carry trades has contracted. CICC judges the likelihood of a reversal remains limited, though structural changes in Japanese rates may gradually reduce yen-funded borrowing.