The US dollar rose alongside higher oil prices, pushing USD/JPY back towards 158.00. This is close to levels seen before suspected Japanese intervention on 6 May.
Japanese and US officials have stated they are coordinating responses to undesirable and excessive currency volatility. These comments indicate intervention remains an option if volatility persists.
Intervention Risk Near Key Levels
Media reports say Japan has spent around JPY10 trillion to support the yen. Further action may be considered if the drivers of yen weakness do not change.
The Middle East conflict has contributed to higher energy prices, worsening Japan’s terms of trade. Yield spreads have also moved against the yen as markets price in rate rises by other major central banks.
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Given that USD/JPY is again pushing towards the 158.00 level, we should be extremely cautious with long positions. This level has become a clear line in the sand for Japanese authorities, and the risk of another sudden intervention to strengthen the yen is now very high. Any positions betting on a weaker yen should be managed with tight stop-losses.
Options Positioning And Volatility
The fundamental pressures on the yen are not going away, which is why the pair keeps climbing back up. With WTI crude holding firm above $75 a barrel and the yield differential between US and Japanese 10-year bonds remaining wide at over 350 basis points, the path of least resistance for the currency is weakness. This creates a tense standoff between market fundamentals and the threat of official action.
We remember well the interventions back in the spring of 2024, when Japanese authorities spent nearly ¥10 trillion to defend the currency. That move caused a rapid drop in USD/JPY from over 160 to below 155 in a matter of hours, wiping out unprepared long positions. We should expect any new intervention to be similarly swift and forceful.
The continued public statements of coordination between the US Treasury and Japan’s Ministry of Finance give these threats more weight. This isn’t just Japan acting alone; the US has signaled its approval for measures that curb excessive volatility. This political backing makes it more likely that officials will act again if they feel the currency is moving too quickly.
For derivative traders, this environment suggests implied volatility on USD/JPY options may be undervalued, especially for near-term expiries. Buying JPY call / USD put options can serve as a direct bet on intervention or as a hedge for portfolios exposed to a strong dollar. Selling out-of-the-money USD call spreads above the 159.00 level could also be a viable strategy to collect premium from the expected resistance.
