Stock Market Update Tuesday September 30, 2025
- Oct 1, 2025
- 2 min read
Stock Market Update Tuesday September 30, 2025 Equities traded in subdued fashion for most of the session before mounting a steady grind higher into the close, supported by end-of-quarter portfolio rebalancing flows, particularly in the final minutes of trade. The late-session bid lifted the S&P 500 (SPX) to within striking distance of record highs, capping its strongest September performance in 15 years. The advance was fueled by persistent AI-driven momentum and resilient corporate earnings, which continued to underpin risk appetite despite ongoing macro uncertainties. Leadership came from NVIDIA (NVDA), which broke out to fresh all-time highs, extending its dominant role as a market bellwether. Broader price action was more uneven. Small caps, after notching new highs last week, remained in consolidation mode. However, the Russell 2000 (IWM) staged a late reversal, erasing earlier losses to finish flat on the day.
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