Options implied-volatility gap between venues

Gap = (highest mark IV − lowest mark IV) × 100 in volatility percentage points: marks of 0.52 and 0.50 are a 2.00 point gap. A 0.00 gap means the venues marked the contract at the same IV. Contracts match only on the exact coin, expiry, strike and call/put type; "–" means the venue sent no bid or ask IV. Ties are ordered by expiry, strike and type.

Each venue's record needs a positive mark IV and forward, a mark inside its own bid/ask IV where quoted, and a snapshot at most 20 minutes old; the venues' snapshots must be at most 5 minutes apart and their forwards within 0.5% of each other. Expiries with incomplete open interest are left out. Recorded every 5 minutes from public exchange APIs; times are UTC; cached for up to 120 seconds.

Not a trading signal. Equal strikes and expiries and close forwards do not mean identical settlement, index, margin, fees or execution: venue marks are model values, not prices you can trade at. A mark IV gap is a research comparison, never a tradable profit.