BTC 18SEP26 Options Chain

BTC options expiring 18SEP26, 11 days out, with the forward at $79,544. Open interest is $499M in calls and $333M in puts, put/call 0.67, and max pain is $79,000. At-the-money implied volatility is 37.1%. 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.

Chain

Derive bid / ask (IV) · Deribit bid / ask (IV) · open interest in contracts, both venues combined.

Call OI	Derive call	Deribit call	Strike	Deribit put	Derive put	Put OI
0	$26736 / $32287 57%	–	50000	–	– / $3.00 57%	0
0	$22195 / $26845 57%	–	55000	–	– / $7.00 57%	0
0	$17635 / $21409 57%	–	60000	–	– / $15.00 57%	0
0	$15366 / $15635 54%	–	64000	–	$1.00 / $33.00 54%	0
0	$14384 / $14654 52%	$14220 / $14840 53%	65000	$30.00 / $40.00 53%	$8.00 / $40.00 52%	6
0	$13393 / $13663 50%	–	66000	–	$17.00 / $49.00 50%	0
0	$11404 / $11674 47%	$11240 / $11880 47%	68000	$55.00 / $80.00 47%	$48.00 / $80.00 47%	6
0	–	$10260 / $10880 46%	69000	$70.00 / $80.00 46%	–	0
0	$9451 / $9728 45%	$9300 / $9900 44%	70000	$90.00 / $105 44%	$96.00 / $129 45%	3
0	$7518 / $7814 42%	$7380 / $7980 41%	72000	$170 / $190 41%	$179 / $212 42%	0
0	$5665 / $5993 39%	$5560 / $6100 39%	74000	$340 / $365 39%	$350 / $381 39%	14
0	–	$4700 / $5240 38%	75000	$490 / $505 38%	–	0
2	$4124 / $4323 38%	$3940 / $4440 37%	76000	$680 / $705 37%	$700 / $727 38%	3
0	–	$3240 / $3700 37%	77000	$940 / $980 37%	–	1
0	$2787 / $2914 37%	$2600 / $3040 37%	78000	$1280 / $1340 37%	$1320 / $1349 37%	4
0	–	$2240 / $2340 37%	79000	$1700 / $1780 37%	–	0
41	$1770 / $1837 36%	$1780 / $1840 37%	80000	$2220 / $2320 37%	$2270 / $2314 36%	0
0	–	$1380 / $1440 37%	81000	$2820 / $2920 37%	–	0
4	$1050 / $1106 37%	$1060 / $1120 38%	82000	$3360 / $3800 38%	$3464 / $3625 37%	2
0	–	$815 / $855 38%	83000	$4100 / $4560 38%	–	0
2	$610 / $645 38%	$615 / $650 39%	84000	$4880 / $5400 39%	$4954 / $5224 38%	2
0	–	$465 / $500 39%	85000	$5740 / $6260 39%	–	0
141	$340 / $371 40%	$350 / $380 40%	86000	$6620 / $7160 40%	$5858 / $7449 40%	0
0	$186 / $220 42%	$195 / $225 42%	88000	$8440 / $9000 42%	$8517 / $8814 42%	0
200	$104 / $137 44%	$115 / $135 43%	90000	$10340 / $10960 43%	$10421 / $10736 44%	0
100	$31.00 / $130 46%	–	92000	–	$12391 / $12688 46%	0
0	– / – 47%	–	94000	–	$14363 / $14643 47%	0
0	– / – 48%	$35.00 / $65.00 49%	95000	$15260 / $15880 49%	$15358 / $15631 48%	0
0	– / – 49%	–	96000	–	$16364 / $16631 49%	0
0	– / – 51%	–	98000	–	$18349 / $18607 51%	0
0	– / – 52%	–	100000	–	– / – 52%	0
0	– / – 54%	–	105000	–	– / – 54%	0
0	– / – 54%	–	110000	–	– / – 54%	0
0	– / – 54%	–	115000	–	– / – 54%	0
0	– / – 54%	–	120000	–	– / – 54%	0
0	– / – 54%	–	125000	–	– / – 54%	0