The yen extended its decline against the US dollar on Monday, with USD/JPY at 160.30, after reversing the gains seen following an alleged intervention on 30 April and breaking above 160.00, a level often treated as a line in the sand for Japan’s authorities. Official data showed Japan’s foreign reserves fell in May by the largest amount since records began in 2000, pointing to heavy support operations. Separately, a sharp, unexplained move on 30 April saw USD/JPY drop about 400 pips.
US dollar demand was underpinned by stronger US labour data and a rise in oil prices as Israel and Iran exchanged attacks, despite calls for restraint by President Donald Trump. May payrolls rose 172K, versus an 85K forecast, and then April was revised to 179K from 115K, reinforcing expectations of tighter Federal Reserve policy later this year. Oil climbed about $4 from Friday’s lows, with Brent at around $96.40. In Japan, first-quarter annualised GDP was revised to 1.8% from 2.1%, above the prior quarter’s 1.3%, while quarterly growth was unchanged at 0.5%.
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Intervention Risk and Authorities’ Response
As of today, June 8, 2026, we are watching USD/JPY trade above the critical 160.00 level. This is the same area that triggered a sharp, 400-pip drop on April 30, suggesting we must be on high alert for another intervention. The coming weeks will be defined by whether Japanese authorities will defend this line again.
The threat of intervention is credible, as we see officials using the same strong language as they did in April. Recent Ministry of Finance data showed that Japan spent a record ¥9.79 trillion (about $61 billion) in the April-May period to support its currency. Therefore, we should factor in the significant risk of a sudden and sharp fall in USD/JPY if authorities act decisively.
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US Dollar Strength, Market Volatility, and External Risks
However, the powerful US jobs report adds compelling reasons to stay long on the US dollar. With payrolls growing by 172,000 against an 85,000 forecast, market pricing now reflects a much higher probability of a Federal Reserve rate hike this year. This fundamental divergence in monetary policy is the primary force pushing the pair higher.
Given these two powerful and opposing forces, we expect a massive spike in volatility. We believe buying options strategies like at-the-money straddles is a sensible approach, as this will profit from a large price swing in either direction. Historically, one-month implied volatility for USD/JPY surged from 8% to over 12% during the last intervention period, rewarding those positioned for a big move.
All eyes are on the Bank of Japan’s policy meeting next week. While the market anticipates a rate hike, a smaller-than-expected move or dovish forward guidance could disappoint traders and trigger another wave of yen selling. This event could be the catalyst that forces authorities to either intervene or let the currency weaken further.
We must also consider the geopolitical risk from the Middle East, which has pushed Brent crude oil to $96.40 a barrel. As one of the world’s largest energy importers, Japan’s economy is hurt by high oil prices, which weighs heavily on the yen. This external pressure provides another reason to be cautious about taking on large, unhedged short positions in USD/JPY.
