美国关税政策变化及影响

Policy Changes - The U.S. tariff policy has shifted from "emergency state tariffs" to "temporary additional tariffs" with a maximum rate of 15% and a duration of 150 days, requiring Congressional approval for extension[7][10]. - The Supreme Court's ruling has limited the President's ability to impose broad tariffs under the IEEPA, prompting a reliance on Section 122 of the Trade Act of 1974 as a transitional tool[1][9]. Future Tariff Structure - The U.S. tariff system is expected to evolve into a "three-layer parallel" structure: Section 122 as a short-term tool, Section 232 (national security) and Section 301 (unfair trade) as mid-term channels, and Congressional legislation for tariffs and subsidies as a supportive framework[2][3]. - Section 301 investigations against China are still active, indicating ongoing targeted tariff measures despite the general tariff increase[2][14]. Impact on China - The immediate impact on China includes fluctuations in external demand, profit compression in industries, and disruptions in order allocation, rather than a complete loss of competitiveness[3][18]. - China's comparative advantages may be highlighted in sectors where supply chain integrity and cost efficiency remain strong, potentially benefiting domestic manufacturing[3][19]. Long-term Considerations - The temporary nature of Section 122 suggests it is not a long-term solution, and future tariffs may increasingly rely on targeted measures under Sections 301 and 232, which focus on specific industries and national security concerns[13][24]. - The potential for a dual approach combining tariffs and non-tariff measures (e.g., stricter customs enforcement, investment reviews) indicates a shift towards more complex trade friction rather than simple tariff increases[15][24].