Bank of America Warns of Japan Sell-Off Risk as Short Yen Bets Reach Extreme Levels

Bank of America analysts are warning that speculative bets against the Japanese yen have reached stretched levels, increasing the risk of a sharp market unwinding that could trigger a sell-off in Japanese assets. The firm's analysis, published Monday, highlights extreme positioning and a recent shift in foreign investor flows away from Japan.

Positioning Reaches Critical Levels

According to the BofA report, speculative short yen positioning on the CME is approaching levels last seen in July 2024, indicating a crowded trade that could be prone to a rapid reversal. The bank noted that yen carry trades may be gradually building, with yen selling driven largely by offshore markets.

Further evidence of this sentiment is the one-year USD/JPY risk reversal, a measure of market demand for options, which has moved into positive territory for the first time since 2022. Citing data from Japan’s Ministry of Finance, BofA also pointed out that foreign investors became net sellers of both Japanese bonds and equities in June, reversing a trend of substantial inflows.

Drivers and Potential Catalysts

The persistent speculative selling has been fueled by market concerns over Japan's fiscal situation and the perception that the Bank of Japan has fallen "behind the curve" with its monetary policy, BofA stated.

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The bank identified three potential catalysts that could trigger a rapid unwinding of these short positions:

• Foreign exchange intervention by Japanese authorities of a greater magnitude than the market currently anticipates.
• A significant reversal of the global, AI-driven equity rally.
• A policy shift by the Takaichi administration in response to mounting market pressure.

Underlying Economic Picture

Despite the bearish positioning, BofA's analysis also noted that Japan's underlying economic fundamentals are showing signs of improvement. The country's balance of payments continues to strengthen.

This improvement is largely supported by robust export growth, particularly from AI-related demand, which is increasingly helping to offset the nation's deficit in digital services. This underlying strength could provide a degree of support for the yen if speculative sentiment were to shift.