美国总统签署行政令，11月1日起征收

Group 1: Tariff Imposition on Trucks - The U.S. government will impose a 25% tariff on imported medium and heavy trucks and parts starting November 1, with an additional 10% tariff on imported passenger buses [1] - The U.S. Chamber of Commerce has urged the government to reconsider these tariffs, highlighting that the top five sources of heavy truck imports are allied countries [1] - In the previous year, the U.S. imported nearly 245,000 medium and heavy trucks, with a trade value exceeding $20 billion [1] Group 2: Economic Activity Report - The Federal Reserve's recent economic survey indicates that economic activity has shown little overall change, with some regions reporting slight to moderate growth while others experienced stagnation or slight decline [2] - Consumer spending, particularly in retail, has seen a slight decrease, and demand for leisure and hotel services from international travelers has further declined [2] - Manufacturing activity is challenged by increased tariffs and weak overall demand, with agricultural, energy, and transportation sectors generally experiencing declines [2]