Yen short positions are at a nine-year high ahead of Tuesday's BOJ rate decision, raising the risk of a violent short squeeze if the BOJ signals accelerated tightening. A squeeze could unwind yen-funded carry trades, pulling liquidity from risk assets including Bitcoin.
A BOJ decision to hold rates with cautious forward guidance would relieve carry-trade pressure, and BTC's trend heading into the meeting remains constructive if dollar liquidity conditions stay loose.
Yen shorts at a nine-year high represent one of the most crowded macro positions in FX markets; a hawkish BOJ surprise could force rapid short-covering, lifting the yen sharply and triggering the kind of cross-asset deleveraging that hit BTC for double-digit losses in August 2024.