Tech Concentration Pushes QQQ 456% in Decade as AI Stocks Mirror 1999 Bubble Pattern
The Nasdaq-100 ETF (QQQ) surged 456% over 10 years with 46% annual gains concentrated in AI-linked technology stocks. Market analysts identify explicit concentration risk as returns cluster in a narrow band of AI companies, replicating the internet bubble structure from 1995-2000.
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