BTC options expiring 27NOV26, 81 days out, with the forward at $80,150. Open interest is $263M in calls and $110M in puts, put/call 0.42, and max pain is $78,000. At-the-money implied volatility is 38.6%. Where a strike is listed on both venues the cheaper ask and richer bid are visible side by side; the arb scanner flags any gap that exceeds fees. Strikes shown are within 60% of the forward. All BTC expiries.