Core Viewpoint - The Japanese yen experienced a significant appreciation against the US dollar due to market speculation about potential coordinated currency intervention by Japan and the US, with the yen rising from approximately 158.4 to 153.9 yen per dollar in a short period [1] Group 1: Currency Market Dynamics - On the Tokyo foreign exchange market, the yen was trading at about 158.4 yen per dollar at the close on the 23rd, and it surged to 153.9 yen per dollar in early trading on the 26th, marking an increase of over 4 yen [1] - There were notable spikes in the yen's exchange rate in both Tokyo and New York markets on the afternoon of the 23rd, leading to speculation about a possible joint intervention by Japanese and US authorities [1] Group 2: Intervention Signals - The term "exchange rate inquiry" was mentioned, indicating that financial authorities may be preparing for intervention by assessing current exchange rates and market conditions, which is seen as a stronger signal than verbal intervention [1] - A representative from a London financial intermediary confirmed that the Federal Reserve conducted an exchange rate inquiry under the direction of the US Treasury, which was reported by various media outlets [1]

Core Viewpoint - The Japanese yen experienced a significant appreciation against the US dollar due to market speculation about potential coordinated currency intervention by Japanese and US authorities [1] Group 1: Currency Market Dynamics - On January 23, the exchange rate for the yen against the dollar was approximately 158.4 to 1, but by January 26, it surged to 153.9 to 1, marking an increase of over 4 yen [1] - There were notable short-term increases in the yen's value in both Tokyo and New York markets on January 23, leading to speculation about a possible joint intervention by Japan and the US [1] Group 2: Intervention Signals - The term "exchange rate inquiry" was mentioned, indicating that financial authorities may be preparing for currency intervention, which is considered a stronger signal than verbal intervention [1] - A representative from a London financial intermediary confirmed that the Federal Reserve conducted an exchange rate inquiry under the direction of the US Treasury [1]