The Yen Carry Trade Is Back — and the US-Japan Rate Gap Is Why
A widening gap between US and Japanese rates has revived the market’s favourite — and most dangerous — trade. Here is how it works, and what could break it.
JUN/30/2026 · 2 min read
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The yen won't stop falling, and the reason is structural: the US and Japan are pulling their interest rates in opposite directions. That gap is the lifeblood of the carry trade — the market's favourite way to get paid for being patient, and one of its most dangerous.
What is a carry trade?
You borrow in a currency that costs almost nothing and park the money in one that pays more, pocketing the difference. The yen has been the world's funding currency for years because Japanese rates sit near the floor. Sell yen, buy a higher-yielder, and the rate gap pays you to wait.
Why now?
Because the gap is widening on both ends. The Fed is leaning hawkish — officials are even floating hikes — while the Bank of Japan stays pinned near zero. FXStreet describes the yen "extending its fall as the US-Japan rate gap underpins the dollar." Every hawkish Fed headline widens the spread and deepens the incentive to be short yen.
What could blow it up?
This is the trade that snapped in August 2024, and the failure mode hasn't changed: carry pays slowly and unwinds violently. A surprise from the Bank of Japan, a risk-off shock, or a sudden yen spike can trigger a stampede for the exit — FXStreet already noted gold "crashing with the yen as stops were triggered," a reminder of how fast these positions cascade. Our Carry Trade Score (CTS) exists for exactly this: to weigh the reward of the spread against the risk of the unwind, instead of chasing the yield blindly.
The bottom line
The carry trade is back because the rate gap is real and widening. But the same gap that pays you is the rope you're standing on. Respect the spread — and respect what happens when it snaps.
