Japanese retail investors are sharply increasing their bets against the US dollar, building net short positions worth about $17.2 billion. According to the report, that is the largest such position since 2008 and signals rising confidence that the yen could strengthen further.

The move has been led by the country’s well-known army of individual currency traders, often referred to as Mrs. Watanabe. Their net short dollar exposure reportedly jumped fourfold from the previous month, highlighting how quickly sentiment has shifted in favor of the yen.

That trend matters because a stronger wave of retail positioning can influence broader foreign-exchange market dynamics. The report suggests the surge in short-dollar bets may also complicate any plans by Japanese authorities to support the market through intervention, since traders are increasingly aligned around yen appreciation.

Overall, the latest positioning points to a notable change in investor expectations around the dollar-yen trade. With retail traders holding their biggest bearish dollar stance in years, markets are watching closely to see whether support for the yen continues to build.