MDB Options Open Interest by Strike, Oct 21 Settlement

MDB 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 20 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, 2,421 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 310 to 466. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

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

Strike	Expiry	Type	Prior OI	Settled OI	Change
420	10/23	call	99	771	+672
440	10/23	call	50	679	+629
370	10/23	put	66	596	+530
195	02/19	put	19	540	+521
570	11/20	call	85	457	+372
410	10/30	call	194	558	+364
570	12/18	call	170	531	+361
330	11/13	put	23	359	+336
300	10/30	put	189	489	+300
340	02/19	put	92	335	+243
530	02/19	call	180	416	+236
350	02/19	put	80	301	+221
430	10/30	call	39	246	+207
490	11/20	call	90	288	+198
425	10/23	call	84	280	+196

Expiration 2026-10-23

MDB open interest, settled 2026-10-21, expiration 2026-10-23, strikes 340 to 437.5

Strike	Expiry	Type	Prior OI	Settled OI	Change
340	10/23	call	138	130	-8
340	10/23	put	806	624	-182
342.5	10/23	call	19	19	0
342.5	10/23	put	82	84	+2
345	10/23	call	89	89	0
345	10/23	put	106	124	+18
347.5	10/23	call	18	18	0
347.5	10/23	put	199	195	-4
350	10/23	call	330	326	-4
350	10/23	put	111	152	+41
352.5	10/23	call	97	95	-2
352.5	10/23	put	21	39	+18
355	10/23	call	126	120	-6
355	10/23	put	111	123	+12
357.5	10/23	call	161	161	0
357.5	10/23	put	144	142	-2
360	10/23	call	299	269	-30
360	10/23	put	49	71	+22
362.5	10/23	call	55	52	-3
362.5	10/23	put	12	49	+37
365	10/23	call	577	490	-87
365	10/23	put	75	131	+56
367.5	10/23	call	13	17	+4
367.5	10/23	put	13	56	+43
370	10/23	call	308	330	+22
370	10/23	put	66	596	+530
372.5	10/23	call	85	84	-1
372.5	10/23	put	73	98	+25
375	10/23	call	337	281	-56
375	10/23	put	85	130	+45
377.5	10/23	call	18	68	+50
377.5	10/23	put	12	13	+1
380	10/23	call	310	291	-19
380	10/23	put	269	271	+2
382.5	10/23	call	328	336	+8
382.5	10/23	put	20	55	+35
385	10/23	call	432	367	-65
385	10/23	put	79	88	+9
387.5	10/23	call	757	754	-3
387.5	10/23	put	59	70	+11
390	10/23	call	602	622	+20
390	10/23	put	262	274	+12
392.5	10/23	call	16	34	+18
392.5	10/23	put	5	11	+6
395	10/23	call	225	354	+129
395	10/23	put	31	31	0
397.5	10/23	call	48	56	+8
397.5	10/23	put	26	28	+2
400	10/23	call	755	696	-59
400	10/23	put	145	144	-1
402.5	10/23	call	4	63	+59
402.5	10/23	put	0	1	+1
405	10/23	call	74	110	+36
405	10/23	put	142	141	-1
407.5	10/23	call	20	23	+3
410	10/23	call	191	265	+74
410	10/23	put	16	17	+1
412.5	10/23	call	6	13	+7
415	10/23	call	172	200	+28
415	10/23	put	3	3	0
417.5	10/23	call	3	8	+5
420	10/23	call	99	771	+672
420	10/23	put	20	20	0
422.5	10/23	call	2	12	+10
425	10/23	call	84	280	+196
425	10/23	put	82	82	0
427.5	10/23	call	0	8	+8
430	10/23	call	231	244	+13
430	10/23	put	2	2	0
432.5	10/23	call	4	14	+10
435	10/23	call	146	149	+3
437.5	10/23	call	0	1	+1

Expiration 2026-10-30

MDB open interest, settled 2026-10-21, expiration 2026-10-30, strikes 337.5 to 440

Strike	Expiry	Type	Prior OI	Settled OI	Change
337.5	10/30	call	8	8	0
337.5	10/30	put	28	28	0
340	10/30	call	56	54	-2
340	10/30	put	80	139	+59
342.5	10/30	call	4	9	+5
342.5	10/30	put	7	16	+9
345	10/30	call	58	55	-3
345	10/30	put	54	54	0
347.5	10/30	call	71	32	-39
347.5	10/30	put	28	27	-1
350	10/30	call	116	117	+1
350	10/30	put	179	178	-1
352.5	10/30	call	6	6	0
352.5	10/30	put	2	2	0
355	10/30	call	197	197	0
355	10/30	put	594	596	+2
357.5	10/30	call	382	382	0
357.5	10/30	put	18	27	+9
360	10/30	call	605	614	+9
360	10/30	put	222	223	+1
362.5	10/30	call	20	23	+3
362.5	10/30	put	41	57	+16
365	10/30	call	667	666	-1
365	10/30	put	230	281	+51
367.5	10/30	call	73	73	0
367.5	10/30	put	1	3	+2
370	10/30	call	87	85	-2
370	10/30	put	140	161	+21
372.5	10/30	call	11	12	+1
372.5	10/30	put	6	12	+6
375	10/30	call	390	388	-2
375	10/30	put	51	167	+116
377.5	10/30	call	16	14	-2
377.5	10/30	put	2	2	0
380	10/30	call	902	898	-4
380	10/30	put	150	151	+1
382.5	10/30	call	60	45	-15
382.5	10/30	put	4	5	+1
385	10/30	call	158	165	+7
385	10/30	put	46	48	+2
387.5	10/30	call	8	56	+48
387.5	10/30	put	3	4	+1
390	10/30	call	344	381	+37
390	10/30	put	284	282	-2
392.5	10/30	call	3	6	+3
392.5	10/30	put	15	15	0
395	10/30	call	27	32	+5
395	10/30	put	10	10	0
397.5	10/30	call	3	19	+16
400	10/30	call	450	535	+85
400	10/30	put	21	21	0
402.5	10/30	call	30	33	+3
405	10/30	call	40	57	+17
405	10/30	put	8	8	0
407.5	10/30	call	1	32	+31
410	10/30	call	194	558	+364
410	10/30	put	17	17	0
412.5	10/30	call	1	61	+60
415	10/30	call	26	39	+13
415	10/30	put	10	10	0
417.5	10/30	call	0	1	+1
420	10/30	call	130	249	+119
420	10/30	put	98	98	0
422.5	10/30	call	0	2	+2
425	10/30	call	152	326	+174
425	10/30	put	33	33	0
430	10/30	call	39	246	+207
430	10/30	put	4	4	0
435	10/30	call	45	71	+26
435	10/30	put	68	68	0
437.5	10/30	call	8	23	+15
440	10/30	call	141	264	+123
440	10/30	put	58	58	0

Expiration 2026-11-06

MDB open interest, settled 2026-10-21, expiration 2026-11-06, strikes 310 to 465

Strike	Expiry	Type	Prior OI	Settled OI	Change
310	11/06	call	5	5	0
310	11/06	put	151	150	-1
315	11/06	call	11	11	0
315	11/06	put	145	145	0
317.5	11/06	call	1	1	0
320	11/06	call	36	36	0
320	11/06	put	266	264	-2
322.5	11/06	put	0	1	+1
325	11/06	call	14	14	0
325	11/06	put	216	214	-2
327.5	11/06	call	1	1	0
327.5	11/06	put	0	1	+1
330	11/06	call	47	46	-1
330	11/06	put	361	344	-17
335	11/06	call	48	48	0
335	11/06	put	43	42	-1
340	11/06	call	148	147	-1
340	11/06	put	97	94	-3
342.5	11/06	call	1	1	0
342.5	11/06	put	48	48	0
345	11/06	call	156	154	-2
345	11/06	put	274	273	-1
347.5	11/06	call	1	9	+8
347.5	11/06	put	58	59	+1
350	11/06	call	107	105	-2
350	11/06	put	264	264	0
352.5	11/06	call	1	1	0
352.5	11/06	put	3	3	0
355	11/06	call	50	49	-1
355	11/06	put	328	322	-6
357.5	11/06	call	3	3	0
357.5	11/06	put	0	2	+2
360	11/06	call	49	45	-4
360	11/06	put	64	68	+4
362.5	11/06	call	31	31	0
365	11/06	call	91	86	-5
365	11/06	put	28	25	-3
370	11/06	call	67	67	0
370	11/06	put	37	32	-5
375	11/06	call	19	18	-1
375	11/06	put	19	22	+3
380	11/06	call	81	77	-4
380	11/06	put	23	29	+6
385	11/06	call	13	13	0
385	11/06	put	34	35	+1
390	11/06	call	48	50	+2
390	11/06	put	17	19	+2
395	11/06	call	28	29	+1
395	11/06	put	6	6	0
400	11/06	call	106	115	+9
400	11/06	put	69	70	+1
405	11/06	call	20	21	+1
405	11/06	put	13	13	0
410	11/06	call	79	90	+11
410	11/06	put	50	51	+1
415	11/06	call	43	46	+3
415	11/06	put	7	7	0
420	11/06	call	60	62	+2
420	11/06	put	27	27	0
425	11/06	call	18	36	+18
425	11/06	put	35	35	0
430	11/06	call	144	221	+77
430	11/06	put	4	4	0
435	11/06	call	26	27	+1
440	11/06	call	104	105	+1
440	11/06	put	1	1	0
445	11/06	call	7	9	+2
450	11/06	call	35	37	+2
450	11/06	put	1	1	0
455	11/06	call	4	4	0
460	11/06	call	107	109	+2
465	11/06	call	143	143	0

Expiration 2026-11-13

MDB open interest, settled 2026-10-21, expiration 2026-11-13, strikes 290 to 490

Strike	Expiry	Type	Prior OI	Settled OI	Change
290	11/13	put	69	73	+4
295	11/13	put	34	34	0
300	11/13	call	28	28	0
300	11/13	put	11	11	0
305	11/13	call	1	1	0
305	11/13	put	53	53	0
310	11/13	call	7	7	0
310	11/13	put	160	160	0
315	11/13	call	1	1	0
315	11/13	put	15	14	-1
320	11/13	put	44	51	+7
325	11/13	call	10	10	0
325	11/13	put	9	8	-1
330	11/13	call	1	171	+170
330	11/13	put	23	359	+336
335	11/13	call	13	13	0
335	11/13	put	35	36	+1
340	11/13	call	10	9	-1
340	11/13	put	381	380	-1
345	11/13	call	13	26	+13
345	11/13	put	292	298	+6
350	11/13	call	107	107	0
350	11/13	put	170	169	-1
355	11/13	call	28	28	0
355	11/13	put	26	40	+14
360	11/13	call	72	72	0
360	11/13	put	46	44	-2
365	11/13	call	20	19	-1
365	11/13	put	18	23	+5
370	11/13	call	122	122	0
370	11/13	put	9	17	+8
375	11/13	call	6	6	0
375	11/13	put	7	75	+68
380	11/13	call	17	138	+121
380	11/13	put	15	64	+49
385	11/13	call	19	20	+1
385	11/13	put	6	6	0
390	11/13	call	20	22	+2
390	11/13	put	11	13	+2
395	11/13	call	45	44	-1
395	11/13	put	5	5	0
400	11/13	call	23	85	+62
400	11/13	put	0	168	+168
405	11/13	call	6	6	0
410	11/13	call	38	41	+3
410	11/13	put	1	1	0
415	11/13	call	49	49	0
415	11/13	put	4	4	0
420	11/13	call	48	52	+4
420	11/13	put	2	2	0
425	11/13	call	8	8	0
430	11/13	call	2	2	0
435	11/13	call	2	2	0
440	11/13	call	3	3	0
440	11/13	put	10	10	0
445	11/13	call	16	16	0
450	11/13	call	29	30	+1
455	11/13	call	24	24	0
455	11/13	put	1	1	0
460	11/13	call	35	35	0
460	11/13	put	8	8	0
465	11/13	call	1	1	0
470	11/13	call	0	1	+1
480	11/13	call	2	2	0
485	11/13	call	45	46	+1
490	11/13	call	12	23	+11

Expiration 2026-11-20

MDB open interest, settled 2026-10-21, expiration 2026-11-20, strikes 280 to 490

Strike	Expiry	Type	Prior OI	Settled OI	Change
280	11/20	call	67	67	0
280	11/20	put	980	979	-1
290	11/20	call	26	49	+23
290	11/20	put	1,158	1,138	-20
295	11/20	put	1	1	0
300	11/20	call	186	186	0
300	11/20	put	986	952	-34
310	11/20	call	122	122	0
310	11/20	put	328	328	0
315	11/20	put	6	6	0
317.5	11/20	put	1	1	0
320	11/20	call	249	248	-1
320	11/20	put	525	511	-14
325	11/20	put	2	9	+7
327.5	11/20	call	1	1	0
327.5	11/20	put	2	6	+4
330	11/20	call	652	640	-12
330	11/20	put	436	442	+6
332.5	11/20	call	1	1	0
332.5	11/20	put	0	6	+6
335	11/20	call	1	1	0
335	11/20	put	0	1	+1
337.5	11/20	call	142	142	0
340	11/20	call	350	351	+1
340	11/20	put	447	445	-2
342.5	11/20	call	4	4	0
345	11/20	call	44	44	0
345	11/20	put	14	14	0
347.5	11/20	call	20	20	0
347.5	11/20	put	9	9	0
350	11/20	call	1,515	1,506	-9
350	11/20	put	777	777	0
352.5	11/20	call	19	19	0
352.5	11/20	put	40	40	0
355	11/20	call	40	40	0
355	11/20	put	71	90	+19
357.5	11/20	call	9	9	0
357.5	11/20	put	58	58	0
360	11/20	call	2,556	2,555	-1
360	11/20	put	502	503	+1
362.5	11/20	call	40	40	0
362.5	11/20	put	5	5	0
365	11/20	call	10	10	0
365	11/20	put	1	3	+2
370	11/20	call	1,421	1,417	-4
370	11/20	put	492	498	+6
375	11/20	call	21	25	+4
375	11/20	put	0	11	+11
380	11/20	call	462	459	-3
380	11/20	put	244	241	-3
385	11/20	call	6	11	+5
385	11/20	put	0	10	+10
390	11/20	call	152	163	+11
390	11/20	put	214	215	+1
400	11/20	call	1,338	1,316	-22
400	11/20	put	240	243	+3
410	11/20	call	520	532	+12
410	11/20	put	24	28	+4
420	11/20	call	194	194	0
420	11/20	put	58	63	+5
430	11/20	call	286	286	0
430	11/20	put	310	310	0
440	11/20	call	163	146	-17
440	11/20	put	52	52	0
450	11/20	call	654	834	+180
450	11/20	put	15	15	0
460	11/20	call	345	370	+25
460	11/20	put	20	20	0
470	11/20	call	199	232	+33
470	11/20	put	14	14	0
480	11/20	call	130	171	+41
480	11/20	put	25	25	0
490	11/20	call	90	288	+198
490	11/20	put	9	9	0

Expiration 2026-11-27

MDB open interest, settled 2026-10-21, expiration 2026-11-27, strikes 285 to 490

Strike	Expiry	Type	Prior OI	Settled OI	Change
285	11/27	call	7	7	0
285	11/27	put	4	4	0
290	11/27	put	2	8	+6
295	11/27	put	10	10	0
300	11/27	call	4	4	0
300	11/27	put	14	13	-1
305	11/27	call	2	2	0
305	11/27	put	11	13	+2
310	11/27	put	40	44	+4
315	11/27	put	1	1	0
320	11/27	put	5	4	-1
325	11/27	put	7	7	0
330	11/27	call	27	27	0
330	11/27	put	7	6	-1
335	11/27	call	3	3	0
335	11/27	put	5	5	0
340	11/27	call	3	3	0
340	11/27	put	13	11	-2
345	11/27	call	3	3	0
345	11/27	put	4	2	-2
350	11/27	call	5	5	0
350	11/27	put	58	57	-1
355	11/27	call	2	2	0
355	11/27	put	3	3	0
360	11/27	call	34	33	-1
360	11/27	put	80	60	-20
365	11/27	call	2	2	0
365	11/27	put	1	1	0
370	11/27	call	14	13	-1
370	11/27	put	27	27	0
375	11/27	call	1	2	+1
375	11/27	put	2	2	0
380	11/27	call	7	7	0
380	11/27	put	8	8	0
385	11/27	put	1	1	0
390	11/27	call	2	2	0
390	11/27	put	2	2	0
395	11/27	call	0	2	+2
395	11/27	put	7	8	+1
400	11/27	call	20	19	-1
400	11/27	put	6	6	0
405	11/27	put	3	3	0
410	11/27	call	44	44	0
415	11/27	call	4	4	0
420	11/27	call	57	58	+1
430	11/27	call	3	8	+5
430	11/27	put	1	1	0
435	11/27	call	1	1	0
440	11/27	call	1	2	+1
445	11/27	call	1	1	0
445	11/27	put	1	1	0
450	11/27	call	10	20	+10
455	11/27	call	5	5	0
460	11/27	call	21	21	0
470	11/27	call	174	174	0
475	11/27	call	16	17	+1
480	11/27	call	1	3	+2
485	11/27	call	8	8	0
490	11/27	call	43	43	0

Later expirations (2026-12-18, 2027-01-15, 2027-02-19, 2027-03-19, 2027-04-16, 2027-05-21, 2027-06-17, 2027-09-17, 2027-12-17, 2028-01-21, 2028-03-17, 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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