The S&P 500 fell 0.4% Tuesday, but the VIX also fell 2.4%, extending Monday’s 22% drop. “Spot down, vol down” at that size is rare: just 4% of comparable S&P 500 down days since 1990, and the first since March 2025. ▪ It usually comes as fear drains after a spike: 69 of the 100 cases came with the VIX already at 19+. ▪ Seven came within three sessions of a 30%+ VIX jump, like this one, including China’s devaluation (2015), Brexit (2016) and Volmageddon (2018). ▪ The S&P 500 was higher a month later all seven times (avg. +4.2%) and three months later in six of seven (avg. +4.4%), vs. +0.8% and +2.4% for all days. ▪ The exception was 1990, ahead of Iraq’s invasion of Kuwait. Note: The VVIX also fell, but adding that to the analysis doesn't change things. Caveat: Small sample size.
View original →