Several months ago I placed VIX contracts into constant maturity tenors rather than their exact TTM and measured both the spread and contract price volatility and observed a “change in behavior” that was very strongly associated with 20% increases in VIX in the forward 5 trading days before such events manifested in the actual VIX value or term structure going back many years. I traded the “signal” twice live utilizing short puts combined with vertical call debit spreads resulting in 50ish and 120ish% gains. Doubt it will hold up over time but Curious if anyone else has noticed a similar relationship.