BLK Options Open Interest by Strike, Oct 21 Settlement

BLK 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 15 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, 1,329 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 920 to 1,380. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

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

Strike	Expiry	Type	Prior OI	Settled OI	Change
1,200	12/18	call	1,124	1,525	+401
1,200	11/20	call	302	516	+214
1,180	01/15	call	159	228	+69
1,140	11/06	call	226	274	+48
1,300	11/20	call	2,056	2,098	+42
1,000	11/13	put	18	58	+40
1,060	11/20	put	49	83	+34
950	12/18	put	74	104	+30
1,400	11/06	call	0	23	+23
1,085	10/23	put	74	94	+20
1,050	11/20	put	43	63	+20
1,100	10/23	put	88	107	+19
1,095	10/23	put	9	24	+15
1,115	10/23	put	15	30	+15
1,220	04/16	call	6	20	+14

Expiration 2026-10-23

BLK open interest, settled 2026-10-21, expiration 2026-10-23, strikes 1,050 to 1,250

Strike	Expiry	Type	Prior OI	Settled OI	Change
1,050	10/23	call	290	290	0
1,050	10/23	put	33	33	0
1,052.5	10/23	call	2	2	0
1,052.5	10/23	put	38	38	0
1,055	10/23	call	3	3	0
1,055	10/23	put	36	36	0
1,057.5	10/23	call	1	1	0
1,057.5	10/23	put	6	6	0
1,060	10/23	call	29	29	0
1,060	10/23	put	38	38	0
1,062.5	10/23	call	41	41	0
1,062.5	10/23	put	49	49	0
1,065	10/23	call	17	17	0
1,065	10/23	put	116	116	0
1,067.5	10/23	call	12	12	0
1,067.5	10/23	put	9	9	0
1,070	10/23	call	6	6	0
1,070	10/23	put	7	7	0
1,072.5	10/23	call	10	10	0
1,072.5	10/23	put	9	9	0
1,075	10/23	call	69	69	0
1,075	10/23	put	75	77	+2
1,077.5	10/23	call	61	61	0
1,077.5	10/23	put	51	51	0
1,080	10/23	call	224	224	0
1,080	10/23	put	34	44	+10
1,085	10/23	call	15	15	0
1,085	10/23	put	74	94	+20
1,090	10/23	call	49	49	0
1,090	10/23	put	42	52	+10
1,095	10/23	call	12	12	0
1,095	10/23	put	9	24	+15
1,100	10/23	call	27	27	0
1,100	10/23	put	88	107	+19
1,105	10/23	call	30	29	-1
1,105	10/23	put	8	8	0
1,110	10/23	call	5	7	+2
1,110	10/23	put	13	11	-2
1,115	10/23	call	21	21	0
1,115	10/23	put	15	30	+15
1,120	10/23	call	18	19	+1
1,120	10/23	put	3	4	+1
1,125	10/23	call	20	20	0
1,125	10/23	put	4	7	+3
1,130	10/23	call	105	109	+4
1,130	10/23	put	15	18	+3
1,135	10/23	call	7	7	0
1,135	10/23	put	8	9	+1
1,140	10/23	call	21	16	-5
1,140	10/23	put	16	16	0
1,145	10/23	call	10	12	+2
1,150	10/23	call	48	44	-4
1,150	10/23	put	2	2	0
1,155	10/23	call	61	61	0
1,160	10/23	call	56	56	0
1,160	10/23	put	2	2	0
1,165	10/23	call	1	2	+1
1,170	10/23	call	20	20	0
1,170	10/23	put	2	2	0
1,175	10/23	call	6	12	+6
1,180	10/23	call	100	100	0
1,180	10/23	put	7	7	0
1,190	10/23	call	8	18	+10
1,190	10/23	put	1	1	0
1,200	10/23	call	41	41	0
1,200	10/23	put	0	1	+1
1,210	10/23	call	23	34	+11
1,220	10/23	call	17	28	+11
1,230	10/23	call	2	2	0
1,240	10/23	call	6	6	0
1,250	10/23	call	2	2	0

Expiration 2026-10-30

BLK open interest, settled 2026-10-21, expiration 2026-10-30, strikes 1,040 to 1,260

Strike	Expiry	Type	Prior OI	Settled OI	Change
1,040	10/30	call	2	2	0
1,040	10/30	put	6	6	0
1,045	10/30	call	1	1	0
1,050	10/30	call	1	2	+1
1,050	10/30	put	8	8	0
1,055	10/30	put	11	11	0
1,060	10/30	call	6	6	0
1,060	10/30	put	10	15	+5
1,062.5	10/30	put	2	3	+1
1,065	10/30	put	0	1	+1
1,067.5	10/30	call	1	1	0
1,070	10/30	call	13	13	0
1,070	10/30	put	6	7	+1
1,072.5	10/30	put	0	1	+1
1,075	10/30	call	1	1	0
1,075	10/30	put	25	25	0
1,077.5	10/30	call	5	5	0
1,080	10/30	call	10	10	0
1,080	10/30	put	7	8	+1
1,085	10/30	put	1	1	0
1,090	10/30	call	4	4	0
1,090	10/30	put	8	8	0
1,095	10/30	call	8	8	0
1,095	10/30	put	0	1	+1
1,100	10/30	call	10	10	0
1,100	10/30	put	7	13	+6
1,105	10/30	put	1	11	+10
1,110	10/30	call	2	2	0
1,110	10/30	put	6	14	+8
1,115	10/30	call	17	17	0
1,120	10/30	call	5	4	-1
1,120	10/30	put	0	1	+1
1,125	10/30	call	8	8	0
1,130	10/30	call	14	12	-2
1,130	10/30	put	2	2	0
1,135	10/30	call	5	6	+1
1,140	10/30	call	58	57	-1
1,140	10/30	put	1	1	0
1,145	10/30	call	0	4	+4
1,145	10/30	put	4	5	+1
1,150	10/30	call	68	68	0
1,150	10/30	put	1	3	+2
1,155	10/30	call	0	1	+1
1,160	10/30	call	15	15	0
1,165	10/30	call	0	11	+11
1,170	10/30	call	11	14	+3
1,180	10/30	call	7	7	0
1,190	10/30	call	34	34	0
1,200	10/30	call	84	87	+3
1,200	10/30	put	5	5	0
1,210	10/30	call	3	5	+2
1,220	10/30	call	19	22	+3
1,230	10/30	call	25	34	+9
1,240	10/30	call	53	53	0
1,250	10/30	call	9	9	0
1,260	10/30	call	1	1	0

Expiration 2026-11-06

BLK open interest, settled 2026-10-21, expiration 2026-11-06, strikes 840 to 1,400

Strike	Expiry	Type	Prior OI	Settled OI	Change
840	11/06	call	1	1	0
870	11/06	put	2	2	0
880	11/06	call	1	1	0
880	11/06	put	1	1	0
910	11/06	put	4	4	0
930	11/06	put	1	1	0
940	11/06	put	5	5	0
950	11/06	put	3	3	0
960	11/06	put	1	1	0
970	11/06	put	3	3	0
990	11/06	put	3	3	0
1,000	11/06	call	1	1	0
1,000	11/06	put	9	9	0
1,010	11/06	put	2	2	0
1,020	11/06	call	1	1	0
1,020	11/06	put	1	1	0
1,030	11/06	put	11	11	0
1,040	11/06	put	2	2	0
1,050	11/06	call	1	1	0
1,050	11/06	put	6	6	0
1,060	11/06	call	3	3	0
1,060	11/06	put	1	1	0
1,070	11/06	call	7	7	0
1,070	11/06	put	3	3	0
1,080	11/06	call	5	5	0
1,080	11/06	put	1	3	+2
1,090	11/06	call	2	2	0
1,090	11/06	put	1	1	0
1,095	11/06	put	0	1	+1
1,100	11/06	call	2	2	0
1,100	11/06	put	0	1	+1
1,110	11/06	call	1	1	0
1,110	11/06	put	4	4	0
1,120	11/06	call	1	1	0
1,125	11/06	put	2	2	0
1,130	11/06	call	1	1	0
1,130	11/06	put	3	3	0
1,135	11/06	call	0	1	+1
1,140	11/06	call	226	274	+48
1,140	11/06	put	2	2	0
1,150	11/06	call	48	52	+4
1,150	11/06	put	3	3	0
1,160	11/06	call	1	1	0
1,160	11/06	put	0	10	+10
1,165	11/06	put	0	3	+3
1,170	11/06	call	48	48	0
1,180	11/06	call	9	9	0
1,185	11/06	call	0	1	+1
1,200	11/06	call	7	7	0
1,200	11/06	put	1	1	0
1,210	11/06	call	14	14	0
1,250	11/06	call	1	1	0
1,380	11/06	call	0	1	+1
1,400	11/06	call	0	23	+23

Expiration 2026-11-13

BLK open interest, settled 2026-10-21, expiration 2026-11-13, strikes 860 to 1,260

Strike	Expiry	Type	Prior OI	Settled OI	Change
860	11/13	put	1	1	0
880	11/13	put	1	1	0
900	11/13	call	1	1	0
900	11/13	put	36	36	0
910	11/13	put	1	1	0
940	11/13	put	1	1	0
950	11/13	put	1	1	0
960	11/13	put	3	3	0
970	11/13	put	3	3	0
990	11/13	put	3	3	0
1,000	11/13	put	18	58	+40
1,010	11/13	put	6	6	0
1,020	11/13	put	7	7	0
1,030	11/13	put	4	4	0
1,040	11/13	put	2	2	0
1,050	11/13	put	1	1	0
1,060	11/13	put	2	2	0
1,070	11/13	call	4	4	0
1,070	11/13	put	2	2	0
1,080	11/13	call	5	5	0
1,090	11/13	call	4	4	0
1,090	11/13	put	1	1	0
1,100	11/13	call	203	203	0
1,100	11/13	put	4	4	0
1,110	11/13	call	1	1	0
1,110	11/13	put	3	3	0
1,130	11/13	call	2	2	0
1,130	11/13	put	2	2	0
1,140	11/13	call	1	1	0
1,140	11/13	put	3	3	0
1,150	11/13	call	1	1	0
1,160	11/13	call	8	8	0
1,190	11/13	call	4	4	0
1,200	11/13	call	4	5	+1
1,210	11/13	call	3	3	0
1,220	11/13	call	1	1	0
1,250	11/13	call	2	2	0
1,260	11/13	call	1	1	0

Expiration 2026-11-20

BLK open interest, settled 2026-10-21, expiration 2026-11-20, strikes 930 to 1,360

Strike	Expiry	Type	Prior OI	Settled OI	Change
930	11/20	call	1	1	0
930	11/20	put	122	122	0
940	11/20	put	35	35	0
950	11/20	call	1	1	0
950	11/20	put	52	51	-1
960	11/20	call	1	1	0
960	11/20	put	70	70	0
970	11/20	put	137	137	0
980	11/20	call	2	2	0
980	11/20	put	102	101	-1
990	11/20	call	18	18	0
990	11/20	put	19	19	0
1,000	11/20	call	15	15	0
1,000	11/20	put	85	88	+3
1,010	11/20	call	14	14	0
1,010	11/20	put	86	86	0
1,020	11/20	call	7	7	0
1,020	11/20	put	39	40	+1
1,030	11/20	call	34	34	0
1,030	11/20	put	58	60	+2
1,040	11/20	call	47	47	0
1,040	11/20	put	51	60	+9
1,050	11/20	call	104	106	+2
1,050	11/20	put	43	63	+20
1,060	11/20	call	93	93	0
1,060	11/20	put	49	83	+34
1,070	11/20	call	23	23	0
1,070	11/20	put	35	35	0
1,080	11/20	call	36	36	0
1,080	11/20	put	23	25	+2
1,090	11/20	call	12	13	+1
1,090	11/20	put	37	37	0
1,095	11/20	put	0	1	+1
1,100	11/20	call	880	882	+2
1,100	11/20	put	80	71	-9
1,105	11/20	put	0	1	+1
1,110	11/20	call	34	34	0
1,110	11/20	put	30	30	0
1,120	11/20	call	24	24	0
1,120	11/20	put	5	5	0
1,125	11/20	call	1	1	0
1,130	11/20	call	142	142	0
1,130	11/20	put	10	15	+5
1,135	11/20	call	50	50	0
1,140	11/20	call	60	60	0
1,140	11/20	put	5	5	0
1,150	11/20	call	38	38	0
1,150	11/20	put	9	13	+4
1,160	11/20	call	119	119	0
1,170	11/20	call	25	25	0
1,170	11/20	put	1	1	0
1,180	11/20	call	133	133	0
1,190	11/20	call	15	16	+1
1,200	11/20	call	302	516	+214
1,220	11/20	call	30	30	0
1,240	11/20	call	212	219	+7
1,260	11/20	call	26	30	+4
1,280	11/20	call	37	45	+8
1,300	11/20	call	2,056	2,098	+42
1,320	11/20	call	4	6	+2
1,340	11/20	call	148	148	0
1,360	11/20	call	6	6	0

Expiration 2026-11-27

BLK open interest, settled 2026-10-21, expiration 2026-11-27, strikes 860 to 1,400

Strike	Expiry	Type	Prior OI	Settled OI	Change
860	11/27	call	1	1	0
870	11/27	put	5	5	0
880	11/27	put	1	1	0
890	11/27	put	4	4	0
910	11/27	put	1	1	0
940	11/27	put	1	1	0
950	11/27	put	1	1	0
960	11/27	put	1	1	0
970	11/27	put	6	6	0
990	11/27	put	0	1	+1
1,000	11/27	put	2	3	+1
1,010	11/27	put	2	2	0
1,060	11/27	put	1	1	0
1,070	11/27	put	2	3	+1
1,100	11/27	call	0	1	+1
1,100	11/27	put	0	1	+1
1,120	11/27	call	2	2	0
1,120	11/27	put	0	2	+2
1,130	11/27	call	3	3	0
1,140	11/27	call	2	2	0
1,150	11/27	call	3	3	0
1,160	11/27	call	2	3	+1
1,170	11/27	call	3	3	0
1,180	11/27	call	2	2	0
1,190	11/27	call	1	2	+1
1,200	11/27	call	3	4	+1
1,210	11/27	call	9	10	+1
1,230	11/27	call	2	2	0
1,240	11/27	call	1	1	0
1,260	11/27	call	1	1	0
1,270	11/27	call	0	1	+1
1,280	11/27	call	0	1	+1
1,400	11/27	call	10	10	0

Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-04-16, 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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