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Yen Intervention Fuels Carry Trade Surge
21 Aug
Summary
- Japanese investors bought over 5 trillion yen in foreign assets post-intervention.
- Intervention boosted carry trades without removing low borrowing cost incentives.
- Yen gains were short-lived, highlighting BOJ's challenge to narrow yield gaps.
Following Japan's recent currency intervention, Japanese investors significantly ramped up their acquisition of foreign assets. Over the two weeks ending August 15, 2026, net purchases of foreign equities and long-term bonds by Japanese investors exceeded 5 trillion yen. This surge contrasted sharply with net selling in the preceding two weeks.
Market observers suggest that investors capitalized on the yen's sharp appreciation post-intervention to acquire overseas assets at more favorable exchange rates. Experts like Jesper Koll from Monex Group indicated that the intervention effectively "turbo charged" the carry trade. This strategy, which leverages Japan's low borrowing costs against higher overseas yields, is expected to persist as long as these differential conditions remain.
Despite the temporary strengthening of the yen from approximately 164 to 155 against the dollar, these gains were quickly relinquished, with the yen returning towards 159. This volatility highlights the persistent pressure on the Bank of Japan to address the yield gap with the U.S., which stood at roughly 1.8 percentage points for 10-year bonds as of Thursday.
The market's reaction suggests that periods of yen strength are viewed by investors as opportunities to reinforce carry trade positions rather than to exit them. Institutional investors, including pension funds and asset managers, have continued to sell yen. Analysts describe the intervention as addressing a "symptom" rather than the underlying issue of Japan's persistently low borrowing costs and wide interest-rate differentials with other major economies.
Traders and institutional investors are reportedly rebuilding bearish yen positions as the intervention's impact wanes. Some investors have re-established dollar-yen long positions, anticipating further yen depreciation. While speculative short-yen positions have decreased from their peak, the fundamental incentive to fund investments in yen due to low domestic interest rates remains a significant factor influencing currency markets.
