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S&P 500 AI Concentration Peaks; Active Managers Lag as Mega-Cap Dominance Persists

A record concentration of S&P 500 returns is driven by a handful of mega-cap AI stocks (Mag 7), leaving 96% of active fund managers unable to outperform. Breadth deterioration, elevated valuations, and mean reversion risk are mounting as corporate earnings fail to justify premium multiples, creating rotation pressure into overlooked names.

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S&P 500 AI Concentration Peaks; Active Managers Lag as Mega-Cap Dominance Persists has gained +0% in mention volume over the past 24 hours. Sentiment is skeptical. Coverage is led by tier-1 financial press with cross-platform amplification.