Japanese authorities reportedly carried out a foreign exchange intervention on Thursday, Reuters said, citing Nikkei and Japanese government sources. It would be the first reported official intervention since 2024, following repeated warnings to markets.
The operation reportedly involved buying Japanese Yen and selling US Dollars. It was said to be conducted by the Ministry of Finance and the central bank, with no immediate official confirmation.
Reported Intervention Details
The action followed earlier comments from Finance Minister Satsuki Katayama about the timing for “decisive action”, and warnings from currency diplomat Atsushi Mimura about speculative trading. Authorities have linked the move to concerns about excessive and speculative currency moves.
After the reports and earlier signals, the Yen stayed supported. USD/JPY fell 2.21% on Thursday to about 156.90 at the time of writing.
With USD/JPY now trading at a multi-decade high of 161.50, the market is on high alert for another intervention. We must look at the playbook from 2025, when authorities stepped in after the pair crossed 157, as a critical guide. The verbal warnings from officials today echo the same language used just before that past action.
Looking back at the 2025 intervention, we saw it cause a sharp, 2% drop in USD/JPY within hours. That event confirms the Ministry of Finance is willing to act decisively to punish speculators betting against the yen. This history suggests any move will be sudden and forceful to maximize its impact on the market.
The core issue remains the vast interest rate difference between the US and Japan. With the Federal Reserve holding its key rate at 4.5% and recent March 2026 inflation data showing a stubborn 3.1%, the dollar is likely to stay strong. This fundamental pressure means any intervention might only offer temporary relief for the yen.
Options Market Implications
For derivative traders, this means implied volatility is now extremely high, with one-month options pricing in the largest potential swings since 2024. One-month USD/JPY volatility has surged above 14%, making option premiums very expensive. This reflects a market bracing for a sudden, high-impact event in either direction.
We believe that buying JPY call options or USD/JPY put options is a sensible strategy in the coming weeks. This provides a defined-risk way to profit from a potential sharp strengthening of the yen following an intervention. Selling options, particularly uncovered calls on the yen, carries immense risk as a repeat of the 2025 move could lead to severe losses.
