BOJ rate hike could trigger yen short squeeze and bitcoin…

Yen short positions hit a nine-year high of over 115,000 contracts in the week ended June 9, according to CFTC data, setting up a potential short squeeze if the Bank of Japan delivers a hawkish surprise at Tuesday's meeting. The BOJ is widely expected to raise its benchmark rate to 1% from 0.75% — its highest level since 1995 — but the real risk lies in what Governor Kazuo Ueda signals about the pace of future tightening.

Why it matters

Yen-funded carry trades have quietly underpinned bull markets across equities, bonds, and risk assets for years, with some analysts arguing they have also supported crypto. When investors borrow cheaply in yen to hold higher-yielding assets, a sudden yen rally forces rapid deleveraging across the board. Bitcoin, historically one of the most sensitive assets to liquidity shocks, sits squarely in the crossfire.

The setup is a near-direct replay of late July 2024. At that time, yen shorts were at record highs ahead of the BOJ's rate decision. After the hike, the yen surged, carry trades unwound, and bitcoin plunged from roughly $65,000 to $50,000 within a single week.

Market impact

If Tuesday's hike lands as priced and Ueda's tone stays cautious, markets may absorb it without major disruption. But if Ueda signals a faster tightening path or hints that rates could rise well beyond 1%, the yen could strengthen sharply, triggering broad volatility. Crypto would likely be among the hardest-hit asset classes given its sensitivity to sudden liquidity shifts. Bitcoin traders should treat Tuesday's BOJ decision as a macro event, not a sideshow.