BTC 18SEP26 Options Chain

BTC options expiring 18SEP26, 11 days out, with the forward at $79,449. Open interest is $519M in calls and $373M in puts, put/call 0.72, and max pain is $79,000. At-the-money implied volatility is 37.0%. 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	$26624 / $32139 57%	–	50000	–	– / $4.00 57%	0
0	$22072 / $26738 57%	–	55000	–	– / $7.00 57%	0
0	$17523 / $21262 57%	–	60000	–	– / $15.00 57%	0
0	$15250 / $15553 53%	–	64000	–	– / $33.00 53%	0
0	$14253 / $14527 52%	$14160 / $14740 53%	65000	$30.00 / $40.00 53%	$28.00 / $53.00 52%	5
0	$13265 / $13538 50%	–	66000	–	$14.00 / $51.00 50%	0
0	$11256 / $11566 47%	$11180 / $11820 48%	68000	$55.00 / $80.00 48%	$53.00 / $81.00 47%	6
0	–	$10200 / $10780 46%	69000	$70.00 / $80.00 46%	–	0
0	$9361 / $9644 44%	$9220 / $9800 45%	70000	$90.00 / $105 45%	$93.00 / $126 44%	3
0	$7431 / $7734 42%	$7300 / $7920 42%	72000	$180 / $190 42%	$185 / $212 42%	0
0	$5554 / $5887 39%	$5500 / $6060 39%	74000	$350 / $380 39%	$360 / $391 39%	14
0	–	$4660 / $5180 38%	75000	$490 / $525 38%	–	0
2	$4051 / $4247 38%	$3880 / $4360 37%	76000	$700 / $735 37%	$720 / $740 38%	3
0	–	$3200 / $3640 37%	77000	$960 / $1020 37%	–	1
0	$2716 / $2832 37%	$2560 / $3000 37%	78000	$1320 / $1380 37%	$1350 / $1389 37%	4
0	–	$2200 / $2280 37%	79000	$1740 / $1840 37%	–	0
41	$1720 / $1794 37%	$1740 / $1800 37%	80000	$2280 / $2360 37%	$2310 / $2365 37%	0
0	–	$1340 / $1400 37%	81000	$2840 / $3000 37%	–	0
4	$1010 / $1056 37%	$1040 / $1080 38%	82000	$3380 / $3880 38%	$3529 / $3695 37%	2
0	–	$790 / $820 38%	83000	$4180 / $4640 38%	–	0
2	$580 / $612 39%	$600 / $620 38%	84000	$4980 / $5460 38%	$5026 / $5297 39%	2
0	–	$450 / $470 39%	85000	$5780 / $6320 39%	–	0
141	$325 / $348 40%	$340 / $360 40%	86000	$6700 / $7220 40%	$6740 / $7062 40%	0
0	$183 / $205 42%	$190 / $215 41%	88000	$8500 / $9080 41%	$8624 / $8922 42%	0
200	$108 / $130 44%	$115 / $135 43%	90000	$10400 / $11020 43%	$10539 / $10853 44%	0
100	$27.00 / $120 46%	–	92000	–	$12502 / $12799 46%	0
0	– / – 48%	–	94000	–	$14487 / $14768 48%	0
0	$33.00 / $67.00 49%	$35.00 / $65.00 49%	95000	$15320 / $15940 49%	$15483 / $15756 49%	0
0	– / – 50%	–	96000	–	$16493 / $16762 50%	0
0	– / – 51%	–	98000	–	$18494 / $18720 51%	0
0	– / – 53%	–	100000	–	– / – 53%	0
0	– / – 55%	–	105000	–	– / – 55%	0
0	– / – 55%	–	110000	–	– / – 55%	0
0	– / – 55%	–	115000	–	– / – 55%	0
0	– / – 55%	–	120000	–	– / – 55%	0
0	– / – 55%	–	125000	–	– / – 55%	0