S&P 500: Volatility Collapse Fuels Rally as Market Leadership Narrows

The S&P 500 rallied on Monday as implied volatility collapsed, with the VIX dropping from 17.6 to 12. However, the rally is driven by a narrow group of stocks, as single-stock volatility rose and the Dispersion Index climbed to 44.13—levels only seen during the COVID crash and Tariff Tantrum. This suggests the market is becoming increasingly frothy with momentum-driven gains rather than broad participation. Upcoming events like Kevin Warsh's speech and the June jobs report are expected to push volatility higher.