Yen Short Positions Rise to Nine-Year High as Carry Trade Revives Despite Intervention Risks
Miles Bennett
Leveraged funds pushed net yen shorts past 115,000 contracts, the highest since November 2017 and well above the peak before Japan's last intervention round; the market now prices BOJ hikes and FX intervention as "known risks," but the trade's resilience faces a narrowing rate gap.
How large have the short positions grown?
CFTC data show leveraged-fund net yen shorts hit 115,000 contracts in the week to June 9 — the highest since November 2017.
This means → speculative bets against the yen now exceed the peak reached before Japan's government stepped in last year.
The yen hovers near ¥160 per dollar. Intervention fears persist, yet shorts keep building.
Why are speculators no longer afraid of intervention?
JPMorgan strategist Junya Tanase notes that BOJ rate hikes and FX intervention are now "largely priced in" — two years ago both were genuine surprises.
In plain terms = intervention used to land like an ambush; now traders have pre-calculated when and how hard the authorities might act, so the fear premium has shrunk.
The proof is in the flow: many investors treat intervention-driven yen strength as a chance to sell into. During April–May intervention, shorts dipped briefly then rebuilt to pre-intervention levels almost immediately.
What keeps the carry trade alive?
The core prop is a still-wide US–Japan rate gap: borrow cheap yen, deploy into higher-yielding dollar assets, and pocket the spread.
In plain terms = Japan's rates are low, US rates are high — as long as that gap exists, the carry trade pays.
Low global market volatility adds a second tailwind — calm markets mean less risk of a sudden unwind, which emboldens leveraged positioning.
What went wrong before?
In 2024, the BOJ hiked rates and halved bond purchases. The yen surged, forcing traders into emergency liquidations.
Deleveraging cascaded from yen markets into global equities and other currencies — a classic stampede.
This reflects a structural risk: the danger is not a single bad day but the self-reinforcing nature of unwinds — once expectations miss, forced selling amplifies far beyond the yen itself.
What to watch next?
Short positions already exceed the pre-intervention peak. The key variable is whether the market can keep digesting the BOJ's tightening pace.
This means → if the BOJ hikes faster or harder than expected, a narrowing spread plus crowded positioning could replay the 2024 reversal.
Put simply = the carry trade is a bet that "the BOJ won't be more hawkish than priced." If that bet is wrong, bigger positions mean a harder stampede.
Content is for reference only, not financial advice.