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Japan may not have intervened in FX market on Monday despite yen’s surge, BOJ data suggests

By Thomson Reuters Aug 4, 2026 | 4:11 AM

TOKYO, Aug 4 (Reuters) – Japan may not have intervened in the currency market on Monday, central bank data ​indicated, despite a sudden surge in ‌the yen that led traders to anticipate a third straight day of intervention.

The Bank of Japan’s projection for money market conditions for Wednesday ‌points ​to a shortfall of ⁠3.38 trillion yen ($21.43 billion) ⁠versus brokerage forecasts of a shortfall of between 2.32 trillion and 2.6 trillion.

Tuesday’s data did not indicate a large outflow ​in the central bank’s current account balances. Outsized outflows are typically interpreted ⁠as correlating with the ⁠size of any intervention.

The yen ​suddenly leapt in the Asian morning on Monday ​to hit 155.20 per dollar, its ‌strongest in about three months, as traders kept on alert for further intervention by authorities.

The yen’s jump came after Japan’s ⁠finance ministry confirmed it had engaged in joint yen-buying intervention with the United States on Friday.

On ⁠Monday, Bank ‌of Japan data showed Tokyo ⁠may have spent as much ​as $36.58 ‌billion to buy yen to ​strengthen the ⁠currency.

Friday’s joint intervention followed Tokyo’s solo intervention worth up to $.58.97 billion in New York markets a day earlier.

($1 = 157.8500 yen)

(Reporting by Junko Fujita and Satoshi Sugiyama; Editing by ​Clarence Fernandez)