Yen Carry Trade - US Treasuries
The yen carry trade is an investment strategy where investors:
Borrow money in Japanese yen at very low interest rates.
Convert those yen into another currency (such as U.S. dollars, Australian dollars, or emerging-market currencies).
Invest the money in assets with higher returns, such as government bonds, corporate debt, stocks, or real estate.
The goal is to profit from the difference in interest rates (the "carry") and, ideally, from stable or favorable exchange rates.
A simple example
Suppose:
Japan's interest rate is 0.5%.
U.S. Treasury bonds yield 4.5%.
An investor:
Borrows ¥1 billion at 0.5%.
Exchanges it for U.S. dollars.
Buys U.S. Treasuries yielding 4.5%.
Ignoring fees and currency movements, you earn roughly 4 percentage points before leverage.
Do the trade now or no?
Right now, the yen carry trade is a real but thin-margin bet, not the near-obvious trade it was a few years ago. The reward has compressed sharply. We would be picking up about 3% a year (versus a much fatter gap when the BOJ was at zero) — while the risk hasn't shrunk to match: the BOJ is in an active hiking cycle, the Fed is easing, and USD/JPY already swung from ~160 to a 40-year-low ~164 and back within weeks this August, forcing a rare joint US-Japan intervention. Since the breakeven sits around a 3% yen move, that kind of volatility isn't a tail-risk footnote, it's within normal trading range for this pair right now.
That said, it hasn't broken down. The rate differential, even narrowed, is still estimated at 150–275bp through year-end, and after the August intervention, carry traders reportedly rebuilt their positions almost immediately rather than fleeing, with far less market stress than the 2024 unwind produced. So this reads less like "don't do it" and more like "the cushion is thinner than it used to be, and the range you need to survive is smaller than the range this currency pair has already moved through this year" — which is a real, current fact worth weighing rather than a reason to avoid it outright.
