CBOE Options Open Interest by Strike, Oct 21 Settlement

CBOE open interest settled 2026-10-21 vs 2026-10-20.

Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

Computed from the Oct 21 settlement. Next update after the Oct 22 settlement, after 5:30 a.m. PT (8:30 a.m. ET) on Friday, Oct 23, 2026.

All archived unexpired expiration/strike/type keys, including unchanged counts. Series sharing that key are combined; roots and deliverables are not retained. Zero-OI keys omitted by the archive are not reconstructed.

This page shows the 6 nearest of 14 expirations, with the 40 strikes nearest the archived reference price (2026-10-21) for each, plus the largest changes across the whole book. The complete book, 819 expiration/strike/type keys, is in the Markdown table.

Strike bucket on the horizontal axis, settled open contracts per bucket on the vertical axis. Calls in the accent color; puts in orange. Totals across the 6 nearest expirations, strikes from 256 to 384. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

CBOE: largest changes in the full book, settled 2026-10-21 vs 2026-10-20

Strike	Expiry	Type	Prior OI	Settled OI	Change
315	10/30	call	117	220	+103
305	10/23	call	280	191	-89
350	11/20	call	172	257	+85
250	01/15	put	401	462	+61
250	12/18	call	254	207	-47
315	10/23	call	74	119	+45
270	01/15	put	484	439	-45
260	01/15	put	530	486	-44
340	11/20	call	73	110	+37
320	10/23	call	73	108	+35
320	10/30	call	12	45	+33
320	01/15	put	272	305	+33
320	12/18	put	67	99	+32
330	10/30	call	25	53	+28
330	11/20	call	287	315	+28

Expiration 2026-10-23

CBOE open interest, settled 2026-10-21, expiration 2026-10-23, strikes 240 to 360

Strike	Expiry	Type	Prior OI	Settled OI	Change
240	10/23	put	11	11	0
245	10/23	call	0	1	+1
245	10/23	put	9	8	-1
247.5	10/23	call	0	1	+1
247.5	10/23	put	3	3	0
250	10/23	put	21	21	0
252.5	10/23	put	1	1	0
255	10/23	call	1	1	0
255	10/23	put	15	15	0
260	10/23	call	2	2	0
260	10/23	put	43	39	-4
265	10/23	call	1	2	+1
265	10/23	put	23	23	0
267.5	10/23	call	1	1	0
267.5	10/23	put	7	7	0
270	10/23	call	24	24	0
270	10/23	put	14	14	0
272.5	10/23	call	18	18	0
272.5	10/23	put	1	1	0
275	10/23	call	20	20	0
275	10/23	put	13	13	0
280	10/23	call	22	22	0
280	10/23	put	162	162	0
282.5	10/23	call	2	2	0
282.5	10/23	put	13	13	0
285	10/23	call	219	219	0
285	10/23	put	25	25	0
287.5	10/23	call	8	8	0
287.5	10/23	put	10	10	0
290	10/23	call	218	218	0
290	10/23	put	46	47	+1
292.5	10/23	call	2	2	0
292.5	10/23	put	10	17	+7
295	10/23	call	29	29	0
295	10/23	put	325	332	+7
297.5	10/23	call	15	15	0
297.5	10/23	put	44	45	+1
300	10/23	call	17	30	+13
300	10/23	put	30	31	+1
302.5	10/23	call	9	9	0
302.5	10/23	put	1	12	+11
305	10/23	call	280	191	-89
305	10/23	put	35	36	+1
307.5	10/23	call	7	12	+5
307.5	10/23	put	8	9	+1
310	10/23	call	70	90	+20
310	10/23	put	99	103	+4
312.5	10/23	call	81	100	+19
312.5	10/23	put	12	39	+27
315	10/23	call	74	119	+45
315	10/23	put	2	25	+23
317.5	10/23	call	40	58	+18
320	10/23	call	73	108	+35
322.5	10/23	call	23	40	+17
325	10/23	call	42	42	0
327.5	10/23	call	1	2	+1
330	10/23	call	51	75	+24
332.5	10/23	call	2	2	0
335	10/23	call	6	13	+7
340	10/23	call	21	21	0
345	10/23	call	10	10	0
350	10/23	call	1	1	0
355	10/23	call	2	2	0
360	10/23	call	6	6	0

Expiration 2026-10-30

CBOE open interest, settled 2026-10-21, expiration 2026-10-30, strikes 220 to 380

Strike	Expiry	Type	Prior OI	Settled OI	Change
220	10/30	put	7	7	0
225	10/30	put	62	62	0
230	10/30	put	9	9	0
235	10/30	put	6	6	0
240	10/30	put	90	90	0
245	10/30	call	7	7	0
245	10/30	put	16	16	0
250	10/30	call	6	6	0
250	10/30	put	121	120	-1
255	10/30	put	15	15	0
260	10/30	put	32	32	0
265	10/30	call	16	16	0
265	10/30	put	12	6	-6
270	10/30	call	20	20	0
270	10/30	put	77	76	-1
275	10/30	call	6	6	0
275	10/30	put	78	78	0
280	10/30	call	23	23	0
280	10/30	put	19	19	0
282.5	10/30	call	7	7	0
282.5	10/30	put	2	2	0
285	10/30	call	16	16	0
285	10/30	put	78	79	+1
290	10/30	call	28	28	0
290	10/30	put	18	17	-1
292.5	10/30	call	37	37	0
292.5	10/30	put	49	49	0
295	10/30	call	129	129	0
295	10/30	put	126	128	+2
297.5	10/30	call	2	2	0
297.5	10/30	put	86	86	0
300	10/30	call	42	44	+2
300	10/30	put	23	23	0
302.5	10/30	call	8	8	0
302.5	10/30	put	3	4	+1
305	10/30	call	53	50	-3
305	10/30	put	6	6	0
307.5	10/30	call	13	17	+4
307.5	10/30	put	8	10	+2
310	10/30	call	114	129	+15
310	10/30	put	10	11	+1
312.5	10/30	call	0	1	+1
315	10/30	call	117	220	+103
315	10/30	put	1	1	0
317.5	10/30	call	2	18	+16
320	10/30	call	12	45	+33
320	10/30	put	1	1	0
322.5	10/30	call	12	15	+3
325	10/30	call	36	58	+22
327.5	10/30	call	16	19	+3
330	10/30	call	25	53	+28
330	10/30	put	1	1	0
332.5	10/30	call	0	3	+3
335	10/30	call	19	19	0
340	10/30	call	28	29	+1
350	10/30	call	1	1	0
355	10/30	call	1	1	0
360	10/30	call	3	3	0
375	10/30	call	3	3	0
380	10/30	call	20	22	+2

Expiration 2026-11-06

CBOE open interest, settled 2026-10-21, expiration 2026-11-06, strikes 195 to 370

Strike	Expiry	Type	Prior OI	Settled OI	Change
195	11/06	put	3	3	0
200	11/06	put	5	5	0
205	11/06	put	3	3	0
210	11/06	put	7	7	0
215	11/06	put	5	5	0
220	11/06	call	1	1	0
220	11/06	put	6	6	0
225	11/06	put	2	2	0
230	11/06	put	5	5	0
235	11/06	put	6	6	0
240	11/06	put	13	13	0
245	11/06	put	2	2	0
250	11/06	put	21	21	0
255	11/06	put	10	10	0
260	11/06	put	16	16	0
265	11/06	call	2	2	0
265	11/06	put	35	35	0
270	11/06	call	2	2	0
270	11/06	put	34	34	0
275	11/06	call	5	5	0
275	11/06	put	2	2	0
280	11/06	call	3	4	+1
285	11/06	call	2	2	0
285	11/06	put	1	1	0
290	11/06	call	4	4	0
290	11/06	put	53	53	0
295	11/06	call	2	2	0
295	11/06	put	1	1	0
300	11/06	call	8	8	0
300	11/06	put	3	3	0
305	11/06	call	7	8	+1
305	11/06	put	2	2	0
307.5	11/06	call	0	1	+1
310	11/06	call	10	13	+3
310	11/06	put	4	4	0
315	11/06	call	12	19	+7
317.5	11/06	call	0	1	+1
320	11/06	call	5	5	0
322.5	11/06	call	0	1	+1
325	11/06	call	9	9	0
330	11/06	call	5	7	+2
335	11/06	call	2	2	0
340	11/06	call	5	6	+1
355	11/06	call	9	15	+6
370	11/06	call	0	2	+2

Expiration 2026-11-13

CBOE open interest, settled 2026-10-21, expiration 2026-11-13, strikes 205 to 355

Strike	Expiry	Type	Prior OI	Settled OI	Change
205	11/13	put	7	7	0
210	11/13	put	2	2	0
215	11/13	call	1	1	0
215	11/13	put	2	2	0
220	11/13	call	1	1	0
230	11/13	put	4	4	0
235	11/13	put	8	8	0
240	11/13	put	8	8	0
250	11/13	put	1	1	0
255	11/13	put	1	1	0
260	11/13	put	8	8	0
265	11/13	put	14	14	0
270	11/13	call	1	1	0
270	11/13	put	10	17	+7
275	11/13	call	1	1	0
275	11/13	put	12	12	0
280	11/13	call	13	13	0
280	11/13	put	6	6	0
285	11/13	call	2	2	0
285	11/13	put	3	3	0
290	11/13	call	2	2	0
290	11/13	put	12	12	0
295	11/13	call	1	1	0
295	11/13	put	3	3	0
300	11/13	call	73	73	0
300	11/13	put	36	36	0
305	11/13	call	5	5	0
305	11/13	put	2	2	0
310	11/13	call	1	1	0
310	11/13	put	15	15	0
315	11/13	call	5	9	+4
315	11/13	put	5	5	0
320	11/13	call	11	12	+1
320	11/13	put	6	6	0
325	11/13	call	0	1	+1
335	11/13	put	1	1	0
340	11/13	put	1	1	0
355	11/13	call	1	1	0

Expiration 2026-11-20

CBOE open interest, settled 2026-10-21, expiration 2026-11-20, strikes 175 to 410

Strike	Expiry	Type	Prior OI	Settled OI	Change
175	11/20	put	4	4	0
185	11/20	put	7	7	0
190	11/20	put	4	4	0
200	11/20	put	52	52	0
210	11/20	call	1	1	0
210	11/20	put	46	45	-1
220	11/20	put	177	177	0
230	11/20	put	132	132	0
240	11/20	call	4	4	0
240	11/20	put	230	218	-12
250	11/20	call	15	15	0
250	11/20	put	494	481	-13
260	11/20	call	27	27	0
260	11/20	put	409	405	-4
270	11/20	call	27	26	-1
270	11/20	put	580	576	-4
275	11/20	put	1	2	+1
280	11/20	call	125	121	-4
280	11/20	put	474	468	-6
285	11/20	put	1	4	+3
290	11/20	call	122	121	-1
290	11/20	put	235	232	-3
292.5	11/20	put	15	15	0
295	11/20	put	0	2	+2
297.5	11/20	put	0	1	+1
300	11/20	call	237	237	0
300	11/20	put	252	249	-3
305	11/20	put	0	10	+10
310	11/20	call	263	262	-1
310	11/20	put	100	98	-2
312.5	11/20	put	13	13	0
315	11/20	call	0	3	+3
315	11/20	put	0	1	+1
317.5	11/20	call	0	1	+1
320	11/20	call	558	561	+3
320	11/20	put	40	40	0
322.5	11/20	call	0	1	+1
322.5	11/20	put	0	2	+2
327.5	11/20	call	1	1	0
330	11/20	call	287	315	+28
330	11/20	put	1	1	0
332.5	11/20	call	3	3	0
340	11/20	call	73	110	+37
345	11/20	call	0	3	+3
350	11/20	call	172	257	+85
355	11/20	call	1	3	+2
360	11/20	call	87	106	+19
370	11/20	call	21	21	0
380	11/20	call	8	8	0
390	11/20	call	3	4	+1
400	11/20	call	4	4	0
410	11/20	call	15	15	0

Expiration 2026-11-27

CBOE open interest, settled 2026-10-21, expiration 2026-11-27, strikes 210 to 390

Strike	Expiry	Type	Prior OI	Settled OI	Change
210	11/27	put	1	1	0
220	11/27	put	2	2	0
225	11/27	put	18	18	0
230	11/27	put	2	2	0
235	11/27	put	1	1	0
250	11/27	put	1	1	0
260	11/27	put	2	2	0
265	11/27	put	2	2	0
270	11/27	put	2	2	0
285	11/27	call	1	1	0
285	11/27	put	0	1	+1
290	11/27	call	2	2	0
290	11/27	put	1	1	0
295	11/27	call	1	1	0
295	11/27	put	1	1	0
300	11/27	call	12	12	0
300	11/27	put	2	2	0
310	11/27	call	15	15	0
320	11/27	call	4	4	0
320	11/27	put	1	1	0
325	11/27	call	1	1	0
330	11/27	call	3	3	0
335	11/27	put	1	1	0
340	11/27	call	1	1	0
340	11/27	put	1	1	0
345	11/27	call	1	1	0
350	11/27	call	5	5	0
350	11/27	put	1	1	0
355	11/27	call	1	1	0
360	11/27	call	1	2	+1
365	11/27	call	1	1	0
365	11/27	put	1	1	0
370	11/27	call	1	1	0
380	11/27	call	1	1	0
390	11/27	call	3	3	0

Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-06-17, 2028-01-21, 2028-06-16, 2028-12-15, 2029-01-19) and all other strikes are in the Markdown table.

Markdown table | Open interest changes across symbols

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