One Trade, Two Markets, One Hidden Correction

Despite the S&P 500 trading near record highs, the median constituent is 16% below its own all-time high and 78% of stocks are in correction territory. Only 26% of S&P 500 members advanced in September, indicating sharply deteriorated breadth and index gains concentrated in a small group of large-cap stocks. The narrow leadership raises risk that headline index strength is masking weaker underlying market participation.