标普500指数维持0.86%的跌幅，道指跌466点跌幅收窄至1.04%，纳指跌168点跌幅0.75%。白宫新闻秘书Leavitt称，美国还将向另外12个国家发送关税信函。

Group 1 - The S&P 500 index maintained a decline of 0.86% [1] - The Dow Jones Industrial Average fell by 466 points, with the decline narrowing to 1.04% [1] - The Nasdaq Composite dropped by 168 points, reflecting a decrease of 0.75% [1] Group 2 - The White House Press Secretary Leavitt announced that the U.S. will send tariff letters to an additional 12 countries [1]