Speculators have turned net long on the Japanese yen for the first time since February, marking a sharp reversal in sentiment for a currency that has spent years in a persistent downtrend against the dollar.
Positioning Flips in a Single Week
Data from the US Commodity Futures Trading Commission showed that net non-commercial positions in yen futures swung to 10,796 long contracts in the week ending September 8. That compares with a net short position of 92,227 contracts just a week earlier — one of the sharpest positioning reversals in recent months, and the first net-long reading on the yen since February 24.
What's Driving the Shift
Two key factors are behind the renewed confidence in the yen:
- Bank of Japan rate-hike expectations: Markets are pricing in a faster pace of tightening from the BOJ, which would narrow the interest-rate gap that has made the yen a popular funding currency for carry trades.
- Potential asset repatriation: There is growing speculation that Japanese investors could bring capital back home, adding fresh demand for the currency.
The yen has rallied on these expectations, with the dollar-yen exchange rate touching 152.89 on September 8 — its strongest level since February 17 and a fresh seven-month high.
A Reversal From a Multi-Year Slide
The shift comes after one of the yen's most difficult stretches in decades. The currency's decline accelerated following the election of fiscal dove Sanae Takaichi as prime minister last October, which reinforced concerns that the BOJ was falling behind on policy tightening. The slide bottomed out in July, when the yen hit a four-decade low of 163.99 per dollar, before a coordinated intervention by authorities in Tokyo and Washington helped arrest the fall.
Why It Matters for Global Markets
The yen's long-running weakness has made it the currency of choice for carry trades — borrowing cheaply in yen to fund investments in higher-yielding assets, including US equities, AI-related stocks, and cryptocurrencies. A sustained recovery in the yen raises the risk of these trades unwinding, which could introduce volatility into global risk assets well beyond Japan's borders.
Attention now turns to the BOJ's upcoming policy meeting. Whether this positioning shift signals the start of a durable yen recovery, or simply a short-term correction in speculative bets, will largely depend on how decisively the central bank moves next.
( Source: Reuters/CFTC data, September 2026 )