Japan, US Intervene to Stabilize Yen; BoJ Rate Hike Expected

Japan and the United States have jointly intervened in currency markets to halt the yen's rapid depreciation and prevent it from falling to a 40-year low. This marks a significant shift from Japan's previous solo efforts, which often proved insufficient.

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We strongly support the decisive market and monetary actions taken by Japan to address the yen's significant undervaluation.

The coordinated action, backed by a hawkish signal from the Bank of Japan, saw the yen briefly strengthen to 155.23 against the dollar in early trading. While it later eased slightly, it remains significantly stronger than its July low of around 164 yen per dollar.

Bank of Japan Governor Kazuo Ueda emphasized the need for vigilance against rising prices, leading analysts to predict a September interest rate hike. This stance aligns with U.S. Treasury Secretary Janet Yellen's statement supporting Japan's monetary policy normalization to address currency fluctuations. The U.S. has a vested interest in preventing a further yen decline, as another intervention without subsequent stabilization could risk its credibility.

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Intervention in the currency market can only temporarily alleviate exchange rate fluctuations. A faster rate hike may be needed to provide lasting support for the yen.

Analysts like Naomi Muguruma of Mitsubishi UFJ Morgan Stanley Securities believe a September rate hike is almost certain. She argues that market intervention offers only temporary relief and that a faster rate increase is necessary for sustained yen support. Delaying a hike until October would be counterproductive, potentially triggering another wave of depreciation.

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If the yen shows signs of depreciation again, Japan and the United States will certainly intervene together again.