S&P 500 Breadth Narrows as Investors Shift to Large Caps
Investors rotated into high-quality large-cap stocks in September, leaving 75% of S&P 500 companies in decline despite the index remaining near all-time highs.
Approximately 75% of stocks in the S&P 500 declined in September, signaling a significant narrowing of market breadth. While the index remained only 1% below its August all-time high, gains from a small group of large-cap companies—including Apple, Nvidia, Alphabet, Microsoft, and Meta Platforms—masked widespread weakness across the benchmark.
Morgan Stanley analysts reported that the share of S&P 500 stocks trading above their 200-day moving average dropped to 49% from roughly 75% during the summer. This shift toward defensive positioning followed a late August address by Federal Reserve Chair Kevin Warsh at Jackson Hole, which led investors to price in more hawkish central bank policies.
Despite the median S&P 500 stock continuing to generate earnings growth exceeding 15%, investors are increasingly rotating out of higher-beta stocks into higher-quality large-cap names. Strategists suggest maintaining a focus on large-cap quality while potentially adding riskier stocks in October, provided bond volatility stabilizes.
