周三（3月12日），大盘先扬后抑，午后冲高回落，三大指数集体收跌，中证2000盘中创近8年新高。从盘面看，日内个股涨跌互半，AI抱团信仰开始分歧。中字头发力带动沪指兵临3400点城下进攻未果后回落，尾盘分算力热门股集体遭遇兑现加剧抛压。截至收盘，沪指跌0.23%报3371点，深证成指跌0.17%，创业板指跌0.58%，科创50跌0.73%。全天成交1.73万亿元，有所放量。隔夜美股主要指数高开后...
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