DIA Options Open Interest by Strike, Oct 21 Settlement

DIA 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 19 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, 2,942 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 422 to 633. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

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

Strike	Expiry	Type	Prior OI	Settled OI	Change
521	10/23	put	375	1,198	+823
526	10/23	put	73	871	+798
520	10/23	put	1,298	1,818	+520
530	11/20	call	574	1,092	+518
510	10/23	put	3,963	3,463	-500
529	10/23	call	1,274	804	-470
519	10/23	put	606	1,040	+434
520	01/15	call	3,765	3,340	-425
515	01/15	put	1,623	1,317	-306
500	03/31	put	36	336	+300
475	10/30	call	277	6	-271
538	11/20	call	125	392	+267
525	10/30	put	220	477	+257
531	10/23	call	1,080	824	-256
526	10/23	call	1,060	1,311	+251

Expiration 2026-10-23

DIA open interest, settled 2026-10-21, expiration 2026-10-23, strikes 511 to 544

Strike	Expiry	Type	Prior OI	Settled OI	Change
511	10/23	call	161	113	-48
511	10/23	put	282	223	-59
512	10/23	call	102	101	-1
512	10/23	put	309	392	+83
513	10/23	call	86	83	-3
513	10/23	put	200	195	-5
514	10/23	call	92	92	0
514	10/23	put	386	471	+85
515	10/23	call	184	173	-11
515	10/23	put	654	561	-93
516	10/23	call	142	140	-2
516	10/23	put	246	239	-7
517	10/23	call	225	224	-1
517	10/23	put	225	300	+75
517.5	10/23	call	190	188	-2
517.5	10/23	put	315	287	-28
518	10/23	call	195	190	-5
518	10/23	put	464	390	-74
519	10/23	call	249	227	-22
519	10/23	put	606	1,040	+434
520	10/23	call	1,447	1,427	-20
520	10/23	put	1,298	1,818	+520
521	10/23	call	1,002	959	-43
521	10/23	put	375	1,198	+823
522	10/23	call	401	394	-7
522	10/23	put	485	400	-85
522.5	10/23	call	660	664	+4
522.5	10/23	put	143	162	+19
523	10/23	call	578	543	-35
523	10/23	put	397	407	+10
524	10/23	call	304	289	-15
524	10/23	put	306	458	+152
525	10/23	call	805	764	-41
525	10/23	put	281	393	+112
526	10/23	call	1,060	1,311	+251
526	10/23	put	73	871	+798
527	10/23	call	632	607	-25
527	10/23	put	24	162	+138
527.5	10/23	call	197	219	+22
527.5	10/23	put	23	82	+59
528	10/23	call	350	387	+37
528	10/23	put	27	35	+8
529	10/23	call	1,274	804	-470
529	10/23	put	3	14	+11
530	10/23	call	1,060	1,086	+26
530	10/23	put	85	152	+67
531	10/23	call	1,080	824	-256
531	10/23	put	1	3	+2
532	10/23	call	3,971	3,984	+13
532	10/23	put	0	1	+1
532.5	10/23	call	90	159	+69
532.5	10/23	put	1	7	+6
533	10/23	call	249	275	+26
533	10/23	put	1	2	+1
534	10/23	call	4,010	4,034	+24
535	10/23	call	541	700	+159
535	10/23	put	1	1	0
536	10/23	call	242	295	+53
537	10/23	call	195	197	+2
537.5	10/23	call	41	95	+54
538	10/23	call	327	340	+13
539	10/23	call	23	18	-5
540	10/23	call	264	260	-4
541	10/23	call	264	264	0
542	10/23	call	18	19	+1
542.5	10/23	call	146	147	+1
543	10/23	call	264	264	0
544	10/23	call	347	347	0

Expiration 2026-10-30

DIA open interest, settled 2026-10-21, expiration 2026-10-30, strikes 511 to 544

Strike	Expiry	Type	Prior OI	Settled OI	Change
511	10/30	call	55	55	0
511	10/30	put	347	352	+5
512	10/30	call	88	88	0
512	10/30	put	113	123	+10
512.5	10/30	call	19	19	0
512.5	10/30	put	244	217	-27
513	10/30	call	250	249	-1
513	10/30	put	69	68	-1
514	10/30	call	80	74	-6
514	10/30	put	152	366	+214
515	10/30	call	385	363	-22
515	10/30	put	881	919	+38
516	10/30	call	125	147	+22
516	10/30	put	439	502	+63
517	10/30	call	116	117	+1
517	10/30	put	723	640	-83
517.5	10/30	call	12	12	0
517.5	10/30	put	131	122	-9
518	10/30	call	183	135	-48
518	10/30	put	117	100	-17
519	10/30	call	59	58	-1
519	10/30	put	155	73	-82
520	10/30	call	657	535	-122
520	10/30	put	429	435	+6
521	10/30	call	68	71	+3
521	10/30	put	53	54	+1
522	10/30	call	358	360	+2
522	10/30	put	295	292	-3
522.5	10/30	call	76	76	0
522.5	10/30	put	98	86	-12
523	10/30	call	106	102	-4
523	10/30	put	97	111	+14
524	10/30	call	256	260	+4
524	10/30	put	82	186	+104
525	10/30	call	493	409	-84
525	10/30	put	220	477	+257
526	10/30	call	216	242	+26
526	10/30	put	40	89	+49
527	10/30	call	171	222	+51
527	10/30	put	43	70	+27
527.5	10/30	call	448	457	+9
527.5	10/30	put	12	14	+2
528	10/30	call	139	106	-33
528	10/30	put	3	8	+5
529	10/30	call	405	380	-25
529	10/30	put	7	11	+4
530	10/30	call	808	785	-23
530	10/30	put	28	36	+8
531	10/30	call	1,740	1,749	+9
531	10/30	put	3	3	0
532	10/30	call	408	425	+17
532	10/30	put	2	2	0
532.5	10/30	call	37	61	+24
532.5	10/30	put	2	3	+1
533	10/30	call	101	101	0
533	10/30	put	2	3	+1
534	10/30	call	84	104	+20
535	10/30	call	275	312	+37
535	10/30	put	77	78	+1
536	10/30	call	69	122	+53
536	10/30	put	13	13	0
537	10/30	call	130	159	+29
537.5	10/30	call	58	79	+21
538	10/30	call	40	50	+10
539	10/30	call	52	77	+25
540	10/30	call	169	182	+13
541	10/30	call	3,480	3,478	-2
542	10/30	call	83	99	+16
543	10/30	call	3,644	3,569	-75
544	10/30	call	57	55	-2

Expiration 2026-11-06

DIA open interest, settled 2026-10-21, expiration 2026-11-06, strikes 510 to 545

Strike	Expiry	Type	Prior OI	Settled OI	Change
510	11/06	call	300	301	+1
510	11/06	put	117	123	+6
511	11/06	call	27	27	0
511	11/06	put	21	21	0
512	11/06	call	484	484	0
512	11/06	put	111	118	+7
512.5	11/06	call	12	12	0
512.5	11/06	put	314	314	0
513	11/06	call	14	14	0
513	11/06	put	156	146	-10
514	11/06	call	48	43	-5
514	11/06	put	258	259	+1
515	11/06	call	204	192	-12
515	11/06	put	81	77	-4
516	11/06	call	56	56	0
516	11/06	put	160	160	0
517	11/06	call	30	30	0
517	11/06	put	43	36	-7
517.5	11/06	call	27	27	0
517.5	11/06	put	40	48	+8
518	11/06	call	185	185	0
518	11/06	put	43	45	+2
519	11/06	call	50	47	-3
519	11/06	put	24	31	+7
520	11/06	call	669	658	-11
520	11/06	put	71	102	+31
521	11/06	call	35	29	-6
521	11/06	put	18	17	-1
522	11/06	call	65	65	0
522	11/06	put	12	16	+4
522.5	11/06	call	9	10	+1
522.5	11/06	put	38	41	+3
523	11/06	call	354	347	-7
523	11/06	put	175	186	+11
524	11/06	call	139	143	+4
524	11/06	put	43	45	+2
525	11/06	call	97	100	+3
525	11/06	put	447	470	+23
526	11/06	call	20	24	+4
526	11/06	put	0	100	+100
527	11/06	call	65	61	-4
527	11/06	put	38	51	+13
527.5	11/06	call	14	14	0
527.5	11/06	put	5	28	+23
528	11/06	call	65	65	0
528	11/06	put	0	24	+24
529	11/06	call	8	28	+20
529	11/06	put	0	19	+19
530	11/06	call	70	81	+11
530	11/06	put	4	28	+24
531	11/06	call	52	54	+2
532	11/06	call	33	31	-2
533	11/06	call	28	30	+2
533	11/06	put	1	6	+5
534	11/06	call	17	19	+2
535	11/06	call	114	122	+8
535	11/06	put	4	6	+2
536	11/06	call	91	103	+12
536	11/06	put	2	2	0
537	11/06	call	55	60	+5
537	11/06	put	0	3	+3
538	11/06	call	65	64	-1
539	11/06	call	51	52	+1
540	11/06	call	145	175	+30
541	11/06	call	72	72	0
542	11/06	call	32	33	+1
543	11/06	call	11	14	+3
544	11/06	call	187	196	+9
545	11/06	call	69	66	-3

Expiration 2026-11-13

DIA open interest, settled 2026-10-21, expiration 2026-11-13, strikes 510 to 546

Strike	Expiry	Type	Prior OI	Settled OI	Change
510	11/13	call	26	26	0
510	11/13	put	280	279	-1
511	11/13	call	17	15	-2
511	11/13	put	19	20	+1
512	11/13	call	7	6	-1
512	11/13	put	19	19	0
512.5	11/13	call	13	13	0
512.5	11/13	put	2	3	+1
513	11/13	call	26	26	0
513	11/13	put	13	22	+9
514	11/13	call	39	39	0
514	11/13	put	3	7	+4
515	11/13	call	73	69	-4
515	11/13	put	75	76	+1
516	11/13	call	33	33	0
516	11/13	put	498	500	+2
517	11/13	call	20	20	0
517	11/13	put	16	15	-1
517.5	11/13	call	3	3	0
517.5	11/13	put	14	29	+15
518	11/13	call	58	58	0
518	11/13	put	18	18	0
519	11/13	call	14	14	0
519	11/13	put	30	30	0
520	11/13	call	265	263	-2
520	11/13	put	16	26	+10
521	11/13	call	50	53	+3
521	11/13	put	44	40	-4
522	11/13	call	35	39	+4
522	11/13	put	12	20	+8
522.5	11/13	call	7	8	+1
522.5	11/13	put	20	22	+2
523	11/13	call	34	33	-1
523	11/13	put	8	8	0
524	11/13	call	42	38	-4
524	11/13	put	5	19	+14
525	11/13	call	279	290	+11
525	11/13	put	27	29	+2
526	11/13	call	14	28	+14
526	11/13	put	1	6	+5
527	11/13	call	226	226	0
527	11/13	put	3	7	+4
528	11/13	call	14	15	+1
528	11/13	put	20	20	0
529	11/13	call	4	4	0
529	11/13	put	13	11	-2
530	11/13	call	46	78	+32
530	11/13	put	3	3	0
531	11/13	call	10	10	0
532	11/13	call	6	6	0
532	11/13	put	5	5	0
533	11/13	call	117	117	0
534	11/13	call	18	61	+43
535	11/13	call	296	298	+2
536	11/13	call	14	14	0
537	11/13	call	30	189	+159
538	11/13	call	20	20	0
538	11/13	put	10	10	0
539	11/13	call	65	95	+30
540	11/13	call	81	298	+217
540	11/13	put	0	25	+25
541	11/13	call	16	45	+29
542	11/13	call	15	42	+27
543	11/13	call	9	9	0
544	11/13	call	27	29	+2
545	11/13	call	43	42	-1
546	11/13	call	6	7	+1

Expiration 2026-11-20

DIA open interest, settled 2026-10-21, expiration 2026-11-20, strikes 508 to 547

Strike	Expiry	Type	Prior OI	Settled OI	Change
508	11/20	call	26	26	0
508	11/20	put	25	81	+56
509	11/20	call	24	24	0
509	11/20	put	86	85	-1
510	11/20	call	320	315	-5
510	11/20	put	422	466	+44
511	11/20	call	286	288	+2
511	11/20	put	112	114	+2
512	11/20	call	52	53	+1
512	11/20	put	88	85	-3
513	11/20	call	48	48	0
513	11/20	put	84	82	-2
514	11/20	call	30	30	0
514	11/20	put	671	672	+1
515	11/20	call	252	252	0
515	11/20	put	1,217	1,437	+220
516	11/20	call	66	64	-2
516	11/20	put	43	39	-4
517	11/20	call	31	31	0
517	11/20	put	38	38	0
518	11/20	call	93	92	-1
518	11/20	put	76	70	-6
519	11/20	call	77	75	-2
519	11/20	put	101	95	-6
520	11/20	call	1,078	1,101	+23
520	11/20	put	486	491	+5
521	11/20	call	153	149	-4
521	11/20	put	141	130	-11
522	11/20	call	59	58	-1
522	11/20	put	121	113	-8
523	11/20	call	49	85	+36
523	11/20	put	68	64	-4
524	11/20	call	126	124	-2
524	11/20	put	188	181	-7
525	11/20	call	532	501	-31
525	11/20	put	286	289	+3
526	11/20	call	126	144	+18
526	11/20	put	37	39	+2
527	11/20	call	105	108	+3
527	11/20	put	79	112	+33
528	11/20	call	68	91	+23
528	11/20	put	22	35	+13
529	11/20	call	539	546	+7
529	11/20	put	22	38	+16
530	11/20	call	574	1,092	+518
530	11/20	put	81	89	+8
531	11/20	call	41	44	+3
531	11/20	put	34	37	+3
532	11/20	call	137	268	+131
532	11/20	put	31	34	+3
533	11/20	call	58	61	+3
533	11/20	put	31	31	0
534	11/20	call	472	473	+1
534	11/20	put	28	28	0
535	11/20	call	1,127	1,100	-27
535	11/20	put	120	118	-2
536	11/20	call	39	38	-1
536	11/20	put	12	12	0
537	11/20	call	78	82	+4
537	11/20	put	1	2	+1
538	11/20	call	125	392	+267
538	11/20	put	121	121	0
539	11/20	call	71	77	+6
539	11/20	put	16	16	0
540	11/20	call	3,846	3,803	-43
540	11/20	put	52	52	0
541	11/20	call	54	54	0
541	11/20	put	5	5	0
542	11/20	call	53	66	+13
542	11/20	put	25	25	0
543	11/20	call	33	33	0
544	11/20	call	87	87	0
545	11/20	call	2,620	2,629	+9
545	11/20	put	1	55	+54
546	11/20	call	20	19	-1
546	11/20	put	0	2	+2
547	11/20	call	159	124	-35

Expiration 2026-11-27

DIA open interest, settled 2026-10-21, expiration 2026-11-27, strikes 510 to 546

Strike	Expiry	Type	Prior OI	Settled OI	Change
510	11/27	call	11	11	0
510	11/27	put	36	41	+5
511	11/27	call	1	1	0
511	11/27	put	2	2	0
512	11/27	call	3	3	0
512	11/27	put	21	21	0
512.5	11/27	call	7	7	0
512.5	11/27	put	6	4	-2
513	11/27	call	3	3	0
513	11/27	put	4	4	0
514	11/27	call	3	3	0
514	11/27	put	2	2	0
515	11/27	call	4	4	0
515	11/27	put	10	12	+2
516	11/27	put	79	60	-19
517	11/27	call	2	1	-1
517	11/27	put	24	26	+2
517.5	11/27	call	10	10	0
517.5	11/27	put	2	2	0
518	11/27	call	13	11	-2
518	11/27	put	5	7	+2
519	11/27	call	4	4	0
519	11/27	put	24	25	+1
520	11/27	call	44	41	-3
520	11/27	put	7	11	+4
521	11/27	call	17	17	0
521	11/27	put	3	3	0
522	11/27	call	7	8	+1
522	11/27	put	15	15	0
522.5	11/27	call	7	7	0
523	11/27	call	4	5	+1
523	11/27	put	7	8	+1
524	11/27	call	7	7	0
524	11/27	put	5	9	+4
525	11/27	call	62	65	+3
525	11/27	put	5	8	+3
526	11/27	call	42	44	+2
526	11/27	put	7	52	+45
527	11/27	call	8	8	0
527	11/27	put	0	1	+1
528	11/27	call	6	7	+1
528	11/27	put	0	1	+1
529	11/27	call	4	7	+3
529	11/27	put	10	10	0
530	11/27	call	21	33	+12
530	11/27	put	0	2	+2
531	11/27	call	2	4	+2
531	11/27	put	6	8	+2
532	11/27	call	3	10	+7
532	11/27	put	0	2	+2
533	11/27	call	15	27	+12
533	11/27	put	10	10	0
534	11/27	call	5	6	+1
535	11/27	call	21	30	+9
536	11/27	call	0	1	+1
536	11/27	put	1	1	0
537	11/27	call	1	10	+9
538	11/27	call	12	14	+2
539	11/27	call	4	4	0
540	11/27	call	45	42	-3
540	11/27	put	163	178	+15
541	11/27	call	7	8	+1
542	11/27	call	14	13	-1
543	11/27	call	11	11	0
544	11/27	call	11	10	-1
545	11/27	call	20	23	+3
546	11/27	call	10	10	0

Later expirations (2026-12-18, 2026-12-31, 2027-01-15, 2027-03-19, 2027-03-31, 2027-06-17, 2027-06-30, 2027-09-30, 2027-12-17, 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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