S&P 500 Posts Best Day Since Early August — SkimNews

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- S&P 500 posted its best day since early August, per CNBC's live updates, though stock futures were little changed after the rally.
- CNBC flagged an alarming market signal not observed since 1999 emerging beneath the strong surface-level session, while MarketWatch separately noted signs of weakness as the index nears a record high.
Why it matters: Two separate outlets — CNBC and MarketWatch — are independently flagging that the S&P 500's headline rally is masking internal deterioration, suggesting the benchmark's record-high approach may not reflect broad market health and could mislead investors who track only the index.
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