- The yen surged more than 2% on Thursday to a one-month high against the dollar as traders rushed to unwind yen-funded carry trades, triggered by hawkish comments from BOJ Governor Kazuo Ueda and board member Hajime Takata; swap markets have now priced in a quarter-point hike at the Sept. 18 meeting and nearly three additional moves by July 2027.
- Yen call options against the dollar expiring this month traded at more than 2.5x the volume of puts on Thursday as traders scrambled to cover existing short yen positions — a structural sign of a forced, not discretionary, unwind rather than a tactical repositioning.
- High-yielding funding currencies took collateral damage: the Brazilian real, South African rand, and Mexican peso all fell more than 1% against the yen as carry trade books were liquidated across the board, not just in dollar-yen.
- Leveraged funds held a net short yen position of 81,619 contracts as of Aug. 25, with asset managers short an additional 18,284 contracts — a substantial residual short that could fuel further yen strength if BOJ tightening expectations continue to build ahead of the Sept. 18 decision.
What Happened?
A rush to unwind yen-funded carry trades sent the currency to a one-month high Thursday, with the yen gaining more than 2% against the dollar after hawkish comments from BOJ Governor Kazuo Ueda and board member Hajime Takata. The BOJ is now widely expected to raise rates by 25 basis points at its Sept. 18 meeting, with swap traders pricing in nearly three additional hikes of the same size by July 2027 — a sharp acceleration from the average pace of two hikes per year since early 2024. Two-year Japanese yields jumped roughly 14 basis points this week. The yen is on track for its best week since July, gaining 2.7% against the dollar.
Why It Matters?
The carry trade unwind is more than a currency story — it’s a global risk-off signal. Yen-funded positions are embedded across asset classes: investors borrow cheaply in yen to buy higher-yielding assets in the US, Brazil, and Mexico, and when the yen strengthens rapidly, those positions must be liquidated quickly to avoid losses. The Bank of America’s Ivan Stamenovic described the move as “a broader reallocation of risk” rather than any single actor — which is consistent with a systemic carry unwind rather than a speculative flush. Nomura notes the BOJ could hike at three consecutive meetings through December in an extreme yen-weakness scenario, underscoring how much further this dynamic could run.
What’s Next?
The residual short position — 81,619 net short contracts held by leveraged funds as of Aug. 25, before this week’s move — represents significant fuel for continued yen strength if BOJ expectations hold. Bank of America recommends selling the dollar against the yen, targeting 149 per dollar by year-end (from current levels near 156). Friday’s US payrolls print and next week’s CPI are the next catalysts: an in-line or soft inflation print would reduce Fed hike odds, adding another headwind for the dollar and tailwind for the yen. Societe Generale cautions the unwind may have already cleared crowded positions in the short term — but notes the BOJ will need sustained hawkishness to produce durable yen appreciation.
Source: Bloomberg
