BTC options expiring 19SEP26, 3 days out, with the forward at $75,973. Open interest is $134M in calls and $38M in puts, put/call 0.28, and max pain is $76,000. At-the-money implied volatility is 39.8%. 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.