Shares in US technology giants have risen so rapidly this year, driven by an artificial intelligence frenzy, that their index weighting has skewed Wall Street’s overall performance — and prompted investors to run remarkably similar portfolios.
在人工智能热潮的推动下，美国科技巨头的股价今年以来涨势迅猛，其指数权重已经偏离了华尔街的整体表现，并促使投资者运作极为相似的投资组合。
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