{固定描述} US equity markets declined sharply in a broad sell-off led by technology shares, with the Nasdaq Composite plunging 1.6% as traders stepped back from risk assets following the recent Xi-Trump summit. The Dow Jones Industrial Average fell more than 400 points, reflecting renewed caution across sectors.
US Stock Market Today: Tech Sell-Off Deepens as Nasdaq Slides 1.6% on Summit Caution; Dow Drops 400 Points - {财报副标题}
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