What it means
Investors borrow Japanese yen at near-zero interest rates and use the proceeds to buy higher-yielding currencies, bonds, or equities. The trade earns the rate differential as long as the yen doesn't strengthen.
Why it matters
It's one of the largest hidden positions in global markets - estimates run to multiple trillions of dollars. When the yen rallies suddenly (BoJ hikes, risk-off), the unwind cascades through global asset prices. August 2024 was a small preview.
How to use it
Watch CFTC speculative yen positioning and BoJ rhetoric. Hedge global equity exposure with long JPY puts when positioning is stretched.
Want a worked example or a deeper dive? Ask Rocky how this concept applies to your specific watchlist or trade idea.
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