VIX — Commitment of Traders

VIX futures trade on the CBOE (Cboe Volatility Index) in contracts sized at $1,000 times the VIX level and represent expected 30-day volatility on the S&P 500. COT positioning in VIX futures is a direct read on how the professional futures community is positioned for volatility — a unique dataset not available in most other financial instruments. Large speculative net-short positions in VIX futures signal that funds are betting on continued low volatility and collecting the volatility risk premium; at extremes, these crowded short positions create explosive upside risk if volatility spikes (the "vol short squeeze" phenomenon seen in February 2018 and other episodes). The COT Index for VIX is most useful as a contrarian indicator: when the spec net short is at its most extreme (lowest COT Index), any shock to markets creates a violent covering rally in VIX futures. Commercial participants (volatility arbitrageurs and options desks) provide structural hedging flows. Weekly changes in VIX COT positioning are the most sophisticated real-time measure of institutional risk appetite in the entire COT dataset.