Yen Carry Trade May Exceed $2 Trillion in Scale, Unwinding Risks Trigger Global Regulatory Vigilance
nashnova research
The yen carry trade may now exceed $2 trillion, potentially the largest ever; a disorderly unwind could hit Treasuries, AI stocks, and global markets simultaneously, prompting regulators worldwide to press Tokyo for answers.
What is the yen carry trade, and why has it lasted nearly thirty years?
The carry trade — borrowing in a low-rate currency to buy higher-yielding assets elsewhere — has been fueled by Japan's near-zero benchmark rate for decades.
Only this month did the Bank of Japan raise rates to 1.25%, the first time above 1% since 1995.
This means → for nearly thirty years, hedge funds and institutions could borrow yen almost for free and deploy it into higher-yielding assets worldwide — the spread was the profit.
What does a $2 trillion-plus position actually mean?
Tokyo FX specialists have told global regulators that the current carry trade may well exceed $2 trillion — potentially the largest in history.
Mizuho senior strategist Masayuki Nakajima said the concern is clear: whether an unwind could trigger a global sell-off.
In plain terms = the position is so large that "pulling the plug" could shake the entire global financial system — and the fact that no one knows the exact size is itself a risk.
How has cheap yen quietly propped up Treasuries and AI stocks?
Regulators' top worry: cheap yen may be providing hidden support for U.S. Treasuries while simultaneously inflating the AI-stock bubble.
This means → if the carry trade unwinds, money exits both asset classes at once — and these two happen to be the most critical pillars of today's global markets.
After the Bank of Japan's first rate hike above zero in 2024, a carry-trade shock already rattled global markets; analysts warn the next episode could be broader.
It's no longer just speculators — Japanese corporates are deep in the trade too?
There is a major blind spot in how markets understand the carry trade: the participant base has fundamentally changed.
Beyond hedge funds and "Mrs. Watanabe" — a shorthand for Japanese retail investors who swap low-rate yen savings into higher-yielding foreign assets — hundreds of major Japanese corporations are now using cheap yen to finance an overseas strategic shift worth up to $2 trillion.
Nakajima noted: Japan is the largest source of foreign direct investment into the U.S.; a reversal of these flows would have significant consequences for global markets and the broader economy.
The policy paradox — could pressuring Japan to hike actually ignite the risk?
U.S. Treasury Secretary Scott Bessent warned last month that disorderly moves in the yen could trigger forced unwinds, destabilizing global markets. He cited this as justification for the historic joint U.S.-Japan yen intervention in late July.
Yet some analysts point to a paradox: hawkish U.S. pressure on the Bank of Japan to hike faster, combined with further FX intervention, may create the very unwind conditions policymakers are trying to prevent.
In plain terms = the tool meant to defuse the bomb may itself light the fuse — and that is the risk the market finds hardest to price.
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