市场警惕日美联手干预汇率，日元对美元跳涨

Group 1 - The core viewpoint of the article highlights the significant appreciation of the Japanese yen against the US dollar due to market speculation about potential coordinated intervention by Japanese and US authorities in the foreign exchange market [1] - On January 23, the exchange rate of the yen against the dollar was approximately 158.4, but by January 26, it surged to 153.9, marking an increase of over 4 yen [1] - The article mentions that both Tokyo and New York foreign exchange markets experienced a brief surge in the yen's value on January 23, leading to speculation about a possible joint intervention by Japan and the US [1] Group 2 - The term "exchange rate inquiry" is defined as a process where financial authorities, through central banks, inquire about current exchange rates and market conditions, indicating a stronger signal of market intervention than verbal interventions [1] - A representative from a London financial intermediary stated that the Federal Reserve conducted an exchange rate inquiry under the direction of the US Treasury [1] - Media reports have circulated regarding the exchange rate inquiry, further fueling speculation about potential intervention [1]