USD/JPY Slides Toward 155 on Speculation of Japan's GPIF Portfolio Shift

Key Facts

1USD/JPY broke decisively through 157.99 to around 156, bringing the 155 area into range.

2Speculation that Japan's $2 trillion GPIF could raise its domestic bond allocation is fueling the Yen rally.

3Brent crude climbed to $97.62 as the US-Iran conflict shows signs of extending beyond 2026.

In a move reflecting a potential structural shift in Japanese capital flows, the USD/JPY pair broke decisively through the 157.99 support level to reach the 156 area, with bears now targeting 155. According to reports, this Yen surge is driven by speculation that Japan’s Government Pension Investment Fund (GPIF), which manages approximately $2 trillion, may increase its allocation to domestic bonds. These developments coincide with Brent crude climbing to $97.62 per barrel amid fears that the US-Iran conflict could extend beyond 2026.

This downward pressure on the pair reflects growing hawkish expectations for Bank of Japan (BoJ) policy, especially as the 10-year Japanese government bond yield reached 3.015%, its highest level since 1996. Within the geopolitical context, Brent crude approaching $100 would typically support the Dollar; however, the prospect of a portfolio rebalancing by GPIF—which currently holds a 25% target for domestic bonds—has given the Yen a significant edge. Notably, the pair is approaching territory that previously triggered market interventions costing roughly $96.5 billion.

Traders should monitor technical support levels at 155, though authoritative price data was unavailable at the close of September 3, 2026, per market records. Looking at the economic calendar, recent data showed Japan's unemployment rate held steady at 2.4% on August 27, supporting domestic economic stability. With no major upcoming catalysts scheduled in the immediate calendar, market focus remains on official statements regarding the GPIF portfolio review.