South Korea’s Kospi fell more than 10% overnight, with SK Hynix down close to 15% and Samsung Electronics off 13%, even as Dow Jones Industrial Average futures were up around 1% and S&P 500 futures were roughly flat. The piece frames this divergence as a correlation story: index volatility is mechanically damped when constituent moves fail to line up. On Tuesday, the Cboe S&P 500 Constituent Volatility Index (VIXEQ) traded a shade above 50 while the Cboe 3-Month Implied Correlation Index (COR3M) sat just under 9; with the square root of 9% near 0.3, the arithmetic is used to explain a VIX near 19.
Volatility, Correlation, And Dispersion Metrics
Forward pricing shows tension rather than calm. The Cboe S&P 500 Dispersion Index (DSPX) was near 47 versus a 52-week range of roughly 26-50, described as a six-year high and above its April 2025 peak when the VIX traded at 60. Realised dispersion is presented as concentrated in Information Technology at about 3.85% versus roughly 2.05% elsewhere, while other markers cited include COR1M up around 37% from near 6, a VIXEQ-to-VIX gap near 34 points, and Cboe SKEW near 147. Stock moves listed include SpaceX (SPCX) down roughly 51% from its post-listing high, Alphabet (GOOGL) down 6%, Tesla (TSLA) down 13% and Nvidia (NVDA) down 5%, alongside Q2 S&P 500 profits tracking a rise of around 26% year on year; the next focal point is the 29 July FOMC, with September odds priced close to 80%.
