COF Options Open Interest by Strike, Oct 21 Settlement

COF 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, 743 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 165 to 248. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

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

Strike	Expiry	Type	Prior OI	Settled OI	Change
210	10/23	call	981	1,824	+843
250	01/15	put	195	807	+612
212.5	10/23	call	436	775	+339
230	11/20	call	2,026	2,343	+317
220	10/23	call	1,001	687	-314
225	10/23	call	251	536	+285
205	10/23	call	1,110	829	-281
190	11/20	put	172	445	+273
250	01/15	call	2,192	1,932	-260
235	11/20	call	17	274	+257
200	10/23	put	831	1,076	+245
185	11/20	put	913	690	-223
180	11/20	put	285	477	+192
165	01/15	put	972	1,162	+190
220	11/20	call	690	876	+186

Expiration 2026-10-23

COF open interest, settled 2026-10-21, expiration 2026-10-23, strikes 145 to 255

Strike	Expiry	Type	Prior OI	Settled OI	Change
145	10/23	put	1	1	0
150	10/23	put	19	18	-1
155	10/23	put	1	1	0
160	10/23	call	3	3	0
160	10/23	put	25	25	0
162.5	10/23	put	78	78	0
165	10/23	put	38	38	0
167.5	10/23	put	25	25	0
170	10/23	call	1	1	0
170	10/23	put	150	149	-1
172.5	10/23	call	1	1	0
172.5	10/23	put	77	77	0
175	10/23	call	1	1	0
175	10/23	put	133	129	-4
177.5	10/23	call	2	2	0
177.5	10/23	put	24	17	-7
180	10/23	call	2	1	-1
180	10/23	put	1,266	1,263	-3
182.5	10/23	put	271	249	-22
185	10/23	call	13	12	-1
185	10/23	put	443	427	-16
187.5	10/23	call	15	13	-2
187.5	10/23	put	389	293	-96
190	10/23	call	15	15	0
190	10/23	put	823	740	-83
192.5	10/23	call	5	5	0
192.5	10/23	put	965	847	-118
195	10/23	call	40	40	0
195	10/23	put	1,584	1,565	-19
197.5	10/23	call	70	68	-2
197.5	10/23	put	210	159	-51
200	10/23	call	352	245	-107
200	10/23	put	831	1,076	+245
202.5	10/23	call	414	315	-99
202.5	10/23	put	161	191	+30
205	10/23	call	1,110	829	-281
205	10/23	put	389	426	+37
207.5	10/23	call	208	274	+66
207.5	10/23	put	22	56	+34
210	10/23	call	981	1,824	+843
210	10/23	put	33	88	+55
212.5	10/23	call	436	775	+339
212.5	10/23	put	0	17	+17
215	10/23	call	1,080	1,129	+49
215	10/23	put	66	58	-8
217.5	10/23	call	214	211	-3
220	10/23	call	1,001	687	-314
220	10/23	put	162	106	-56
222.5	10/23	call	203	132	-71
222.5	10/23	put	3	0	-3
225	10/23	call	251	536	+285
225	10/23	put	1	0	-1
227.5	10/23	call	58	57	-1
230	10/23	call	182	181	-1
230	10/23	put	1	1	0
235	10/23	call	82	82	0
235	10/23	put	1	0	-1
240	10/23	call	36	36	0
245	10/23	call	12	11	-1
250	10/23	call	3	3	0
255	10/23	call	20	20	0

Expiration 2026-10-30

COF open interest, settled 2026-10-21, expiration 2026-10-30, strikes 140 to 245

Strike	Expiry	Type	Prior OI	Settled OI	Change
140	10/30	put	3	3	0
145	10/30	put	4	4	0
160	10/30	put	4	4	0
165	10/30	put	7	7	0
170	10/30	call	1	1	0
170	10/30	put	12	12	0
172.5	10/30	put	21	21	0
175	10/30	call	1	1	0
175	10/30	put	51	51	0
177.5	10/30	put	183	183	0
180	10/30	call	1	1	0
180	10/30	put	68	65	-3
182.5	10/30	put	20	19	-1
185	10/30	put	475	370	-105
187.5	10/30	call	2	2	0
187.5	10/30	put	121	109	-12
190	10/30	call	3	3	0
190	10/30	put	116	108	-8
192.5	10/30	call	21	21	0
192.5	10/30	put	38	36	-2
195	10/30	call	6	8	+2
195	10/30	put	167	176	+9
197.5	10/30	call	43	43	0
197.5	10/30	put	61	76	+15
200	10/30	call	168	126	-42
200	10/30	put	204	211	+7
202.5	10/30	call	229	205	-24
202.5	10/30	put	21	25	+4
205	10/30	call	77	77	0
205	10/30	put	78	131	+53
207.5	10/30	call	173	189	+16
207.5	10/30	put	8	33	+25
210	10/30	call	161	169	+8
210	10/30	put	40	42	+2
212.5	10/30	call	212	213	+1
212.5	10/30	put	2	23	+21
215	10/30	call	97	133	+36
215	10/30	put	0	1	+1
217.5	10/30	call	8	59	+51
220	10/30	call	225	368	+143
220	10/30	put	2	2	0
222.5	10/30	call	94	92	-2
225	10/30	call	176	176	0
230	10/30	call	61	61	0
235	10/30	call	20	20	0
240	10/30	call	7	7	0
245	10/30	call	9	9	0

Expiration 2026-11-06

COF open interest, settled 2026-10-21, expiration 2026-11-06, strikes 165 to 245

Strike	Expiry	Type	Prior OI	Settled OI	Change
165	11/06	put	1	1	0
170	11/06	put	14	13	-1
175	11/06	put	33	22	-11
180	11/06	put	24	14	-10
185	11/06	put	17	17	0
187.5	11/06	put	10	10	0
190	11/06	put	42	52	+10
192.5	11/06	put	0	20	+20
195	11/06	call	4	4	0
195	11/06	put	41	41	0
197.5	11/06	put	5	6	+1
200	11/06	call	48	48	0
200	11/06	put	161	173	+12
202.5	11/06	call	4	4	0
202.5	11/06	put	2	1	-1
205	11/06	call	28	29	+1
205	11/06	put	6	14	+8
207.5	11/06	call	12	35	+23
207.5	11/06	put	0	7	+7
210	11/06	call	6	26	+20
210	11/06	put	0	3	+3
212.5	11/06	call	1	16	+15
212.5	11/06	put	0	7	+7
215	11/06	call	219	241	+22
217.5	11/06	call	0	12	+12
220	11/06	call	351	397	+46
225	11/06	call	8	25	+17
225	11/06	put	21	21	0
227.5	11/06	call	1	1	0
230	11/06	call	43	43	0
230	11/06	put	5	5	0
235	11/06	call	30	30	0
235	11/06	put	21	21	0
240	11/06	call	31	31	0
245	11/06	call	3	3	0

Expiration 2026-11-13

COF open interest, settled 2026-10-21, expiration 2026-11-13, strikes 150 to 240

Strike	Expiry	Type	Prior OI	Settled OI	Change
150	11/13	call	3	3	0
155	11/13	call	3	3	0
165	11/13	put	1	1	0
170	11/13	put	1	1	0
175	11/13	put	4	3	-1
180	11/13	call	6	6	0
180	11/13	put	15	14	-1
185	11/13	put	22	19	-3
190	11/13	put	15	12	-3
195	11/13	call	4	6	+2
195	11/13	put	609	607	-2
200	11/13	call	18	15	-3
200	11/13	put	34	41	+7
205	11/13	call	21	22	+1
210	11/13	call	163	178	+15
210	11/13	put	0	4	+4
215	11/13	call	81	84	+3
220	11/13	call	77	79	+2
225	11/13	call	30	32	+2
230	11/13	call	32	41	+9
235	11/13	call	30	30	0
240	11/13	call	30	30	0

Expiration 2026-11-20

COF open interest, settled 2026-10-21, expiration 2026-11-20, strikes 135 to 270

Strike	Expiry	Type	Prior OI	Settled OI	Change
135	11/20	put	2	2	0
140	11/20	call	1	1	0
140	11/20	put	120	120	0
145	11/20	call	10	10	0
145	11/20	put	15	15	0
150	11/20	call	1	1	0
150	11/20	put	2	2	0
155	11/20	call	1	1	0
155	11/20	put	8	8	0
160	11/20	put	29	29	0
165	11/20	put	120	121	+1
170	11/20	call	13	13	0
170	11/20	put	223	223	0
175	11/20	call	10	10	0
175	11/20	put	1,047	1,047	0
180	11/20	call	34	34	0
180	11/20	put	285	477	+192
182.5	11/20	put	6	6	0
185	11/20	call	40	40	0
185	11/20	put	913	690	-223
187.5	11/20	put	41	41	0
190	11/20	call	31	31	0
190	11/20	put	172	445	+273
192.5	11/20	put	28	36	+8
195	11/20	call	303	301	-2
195	11/20	put	402	368	-34
197.5	11/20	call	2	2	0
197.5	11/20	put	12	36	+24
200	11/20	call	618	611	-7
200	11/20	put	479	525	+46
202.5	11/20	call	53	51	-2
202.5	11/20	put	41	41	0
205	11/20	call	96	100	+4
205	11/20	put	1	16	+15
207.5	11/20	call	63	76	+13
207.5	11/20	put	60	64	+4
210	11/20	call	1,216	1,236	+20
210	11/20	put	133	126	-7
212.5	11/20	call	3	32	+29
212.5	11/20	put	0	18	+18
215	11/20	call	30	59	+29
215	11/20	put	49	17	-32
217.5	11/20	call	73	87	+14
220	11/20	call	690	876	+186
220	11/20	put	17	17	0
222.5	11/20	call	2	42	+40
225	11/20	call	1,019	1,087	+68
227.5	11/20	call	121	135	+14
230	11/20	call	2,026	2,343	+317
235	11/20	call	17	274	+257
240	11/20	call	348	370	+22
240	11/20	put	2	2	0
250	11/20	call	154	154	0
260	11/20	call	5	5	0
270	11/20	call	1	2	+1

Expiration 2026-11-27

COF open interest, settled 2026-10-21, expiration 2026-11-27, strikes 150 to 255

Strike	Expiry	Type	Prior OI	Settled OI	Change
150	11/27	put	11	11	0
175	11/27	put	24	25	+1
180	11/27	put	39	40	+1
185	11/27	put	3	8	+5
190	11/27	put	0	7	+7
195	11/27	call	4	2	-2
195	11/27	put	5	6	+1
200	11/27	call	1	1	0
200	11/27	put	16	18	+2
205	11/27	call	12	2	-10
205	11/27	put	0	12	+12
210	11/27	call	47	64	+17
215	11/27	call	4	19	+15
220	11/27	call	32	43	+11
220	11/27	put	0	1	+1
225	11/27	call	38	38	0
230	11/27	call	31	63	+32
235	11/27	call	0	3	+3
240	11/27	call	0	1	+1
255	11/27	call	31	62	+31

Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-06-17, 2027-09-17, 2028-01-21, 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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