Yen’s Potential Rally: $103 Billion Short Positions at Risk

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Yen's Potential Rally: $103 Billion Short Positions at Risk

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The Japanese yen is facing a critical juncture as strategists at JPMorgan Chase & Co. warn that a substantial amount of short positions, estimated between ¥16 trillion and ¥17 trillion ($102.6 billion to $109 billion), are at risk of unraveling if the currency strengthens past 155 per dollar. This potential unwinding could lead to a more significant appreciation of the yen.

The yen has recently experienced a notable rebound, reversing a month-long decline, with the USD/JPY rate declining by nearly 1.00% in the first few days of September 2026. This strengthening is largely driven by growing market expectations for an interest rate hike by the Bank of Japan (BoJ). BoJ Governor Kazuo Ueda stated on September 2, 2026, that the central bank would continue to assess economic conditions and inflation risks, leaving the door open for further rate increases. Markets are currently assigning a high probability, over 80%, to at least a 0.25% rate increase at the BoJ’s September 17-18 meeting.

The USD/JPY exchange rate had climbed to 160.39 earlier in the week, its highest since a joint intervention by Japan and the US in late July, before sharply reversing to as low as 155.30. This move brought the pair close to its post-intervention low of 155.23. The 155 level holds significant importance for traders, as a sustained move below it could trigger a shift in market dynamics, leading to further yen demand as existing dollar buyers fade and Japanese exporters increase dollar sales. Some analysts suggest that a break below 155 could activate triggers for commodity trading advisers to reduce dollar long positions and potentially begin shorting dollars in the dollar-yen pair.

While JPMorgan strategists acknowledge the risks of a yen appreciation, they also suggest that expectations around both the Government Pension Investment Fund’s asset allocation and BoJ rate hikes might be “a bit excessive.” JPMorgan’s base case for the USD/JPY remains within the 155-165 range, with targets of 160 at the end of September and 164 at the end of December, assuming quarterly BoJ rate hikes and no significant changes in Federal Reserve policy expectations. However, the current market sentiment, with the yen strengthening due to BoJ rate hike speculation and potential unwinding of short positions, creates a volatile environment for the currency.

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