过往关税，简要来看：特朗普第一个任期，发起 301 调查加征关税，税率分为 4 个清单，清单 1、清单 2 均 征收 25%关税（两个合计约 500 亿美元，参考 2017 美国从中国进口值），分别在 2018 年 7 月和 8 月落地、清 单 3 同样征收 25%关税（约 2000 亿美元），2019 年 5 月税率提升至 25%，清单 4（约 3000 亿美元）中的一部 分清单 4A 征收 7.5%税率，2020 年 2 月落地，清单 4B 免税。受关税影响，税率较高的中国商品对美出口降幅 较大，2024 年美国对中国加权关税税率约 10%，略低于根据 2017 年美国进口额计算的加权税率 12%（高税率 进口额下降更多）。 证券研究报告|宏观点评报告 [Table_Date] 2025 年 05 月 12 日 [Table_Title] 关税大降，五点解读 5 月 12 日，中美日内瓦经贸会谈联合声明发布，90 天内，中美之间关税税率大幅下降，怎么看？ 第一，关税降幅超预期。5 月 14 日，中国对美国进口商品关税税率从 125%下降至 10%，美国对中国进口 商品关税税率从 145%大幅下降至 30% ...

Group 1 - The core viewpoint of the news highlights the performance of the CSI 500 Quality Growth Index and its constituent stocks, indicating a positive trend in the market with specific stocks showing significant gains [1][2] - As of April 2, 2025, the CSI 500 Quality Growth Index (930939) increased by 0.96%, with notable performers including Ruichuang Micro-Nano (688002) up by 7.36% and Huahai Qingke (688120) up by 7.35% [1] - The CSI 500 Quality Growth ETF (560500) also saw an increase of 1.16%, closing at 0.87 yuan [1] Group 2 - Huaxi Securities noted that the "policy + technology" growth logic since 2024 remains intact, suggesting that a series of policies aimed at boosting domestic demand may be introduced amid trade tensions [2] - The AI and robotics sectors have seen the emergence of localized products, indicating a shift towards self-sufficiency in computing power, which may support market recovery [2] - The CSI 500 Quality Growth Index is composed of 100 companies selected for their high profitability, sustainable earnings, and strong cash flow, providing diverse investment options for investors [2] Group 3 - As of March 31, 2025, the top ten weighted stocks in the CSI 500 Quality Growth Index accounted for 24.26% of the index, with Chifeng Gold (600988) and Ninebot Company (689009) being the top two [2] - The detailed performance of individual stocks within the index shows varied results, with Crystal Optoelectronics (002273) up by 0.30% and Dong'a Ejiao (000423) up by 0.83% [4] - The CSI 500 Quality Growth ETF closely tracks the CSI 500 Quality Growth Index, providing investors with a structured investment vehicle [2][4]