One peer group’s 30-day implied volatility against a baseline, sorted, one row per name. The hollow marker is the baseline, the filled one is where implied vol is now; the bar between them is the gap being measured.

IV 30d is the constant-maturity 30-day implied vol, interpolated between the quoted expirations linearly in total variance rather than in vol — the standard convention, and better behaved across an earnings kink. HV 20 and HV 252 are close-to-close realised vol over 20 and 252 sessions, computed from adjusted closes. Implied sitting above realised is the usual resting state; the interesting rows are the ones where the gap is unusually wide or has flipped.