Yen briefly surges into 158 range as intervention bets mount

2026-07-31

Yen briefly surges into 158 range as intervention bets mount

Intervention speculation resurfaces

In the foreign exchange market on the 31st, the yen briefly surged to the 158-yen range against the dollar. The day before, the yen had also risen sharply, and market speculation grew that the government and the Bank of Japan had stepped in with consecutive yen-buying currency intervention.

Sharp rise in the afternoon of the 31st

The surge came shortly before 6 p.m. Japan time on the 31st, when the yen had been trading in the 160.10-yen area. Given the size of the move in a short period, the market is seen as having been driven not only by speculative short covering but also by moves mindful of official intervention.

BOJ holds rates steady

The Bank of Japan kept its policy rate unchanged at 1.0% at the monetary policy meeting held through that day, as widely expected. At a news conference after the meeting, Governor Kazuo Ueda said the BOJ's underlying price trend, which it closely watches, could 'overshoot the 2% price stability target,' underscoring the bank's stance of continuing its rate-hike path.

Surge also came the night before

The yen also rose sharply on the night of the 30th Japan time, briefly touching around 157.80 per dollar, its strongest level in about two and a half months, since mid-May. The move amounted to about 5 yen in roughly 50 minutes. According to market participants, the government and the Bank of Japan moved to intervene by buying yen and selling dollars, while U.S. currency authorities carried out a so-called rate check, a preliminary step before intervention.

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