Speculative positioning in the Japanese yen shifted sharply bullish during the week ended Sept. 8, marking the first net-long stance since late February, according to Commodity Futures Trading Commission data released Friday.
Non-commercial traders accumulated a net 10,796 long yen futures contracts, a dramatic reversal from the prior week's net short position of 92,227 contracts. The one-week swing exceeded 100,000 contracts, representing one of the more rapid positioning resets in recent yen futures history.
The shift in sentiment coincided with the yen strengthening to 152.89 per dollar on Sept. 8, its strongest level since Feb. 17. The currency had fallen to a four-decade low of 163.99 per dollar in July, pressed lower by years of monetary policy divergence between the Bank of Japan and major peers.
Market participants have increasingly priced in the possibility that the BOJ could accelerate its rate-hike schedule, with concerns growing that Japan risked falling further behind other central banks in tightening monetary policy.
The yen's recent trajectory has been shaped by political developments as well. Fiscal dovish Sanae Takaichi became prime minister in October, following which the currency's decline intensified. Tokyo and Washington later intervened in currency markets to support the yen and halt earlier losses.
The positioning data reflects a broader recalibration among speculators who had piled into short yen bets throughout much of the year, betting on continued BOJ accommodation even as global peers raised borrowing costs. The latest CFTC report suggests that thesis has weakened considerably.
