Japanese Yen Surges 3.3% on Coordinated US-Japan Intervention, August 01

The Japanese yen rallied sharply on July 30-31 after US and Japanese authorities intervened to buy the currency, marking a rare coordinated effort to halt its slide to four-decade lows. The yen jumped as much as 3.3% to 157.80 against the dollar during New York trading, with Japan potentially spending up to $58.97 billion in the operation. The Bank of Japan held its policy rate steady at 1% on Friday but warned that core inflation could exceed its 2% target, signalling readiness for faster rate hikes ahead.

Why authorities acted now

Japan’s yen had weakened to 163.99 against the dollar last week, driven by wide interest rate gaps between the US and Japan and higher oil prices from the Iran war. The currency’s collapse threatens to worsen inflation in Japan by raising import costs. Japan may have sold as much as $58.97 billion in the latest intervention, signalling serious concern from Tokyo’s finance ministry and central bank.

The coordinated move with the US

The Federal Reserve Bank of New York sold euros to buy yen on behalf of the US Treasury Department, according to Bloomberg reporting. US Treasury Secretary Scott Bessent called the yen “very undervalued” in a Fox Business interview. The yen strengthened more than 1% against both the dollar and the euro as both nations bought the currency on Friday.

Bank of Japan signals faster rate hikes

The BOJ kept its policy rate at 1% on Friday in an 8-1 decision, but board member Hajime Takata proposed raising it to 1.25%. The central bank raised its rate to a 31-year high of 1% in June and warned that core inflation could accelerate to “clearly above” 2% from September onward. Market players expect the BOJ to quicken the pace of rate hikes, which have been blamed for the yen’s weakness versus the dollar.

What comes next for traders

Traders remain alert for further intervention, with Japan’s top currency diplomat Atsushi Mimura warning that speculative positions remain in markets. The yen briefly strengthened to 155.49 per dollar in early London trading on Friday before retreating. Analysts note that past interventions in 2022 and 2024 were followed by additional moves, and JPY net shorts remain close to all-time highs.

Final Thoughts

The coordinated US-Japan intervention halted the yen’s freefall, but the currency faces structural headwinds from interest rate gaps and oil prices. For Canadian investors holding yen-denominated assets, the rally provides near-term relief, though medium-term strength depends on the BOJ following through with faster rate hikes.

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