ARM Options Open Interest by Strike, Oct 21 Settlement
ARM 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 18 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, 2,118 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 178 to 267. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
ARM: largest changes in the full book, settled 2026-10-21 vs 2026-10-20
Strike
Expiry
Type
Prior OI
Settled OI
Change
230
11/20
call
273
1,725
+1,452
420
01/15
call
449
1,719
+1,270
290
01/21
call
201
1,203
+1,002
235
10/23
call
619
1,369
+750
230
01/15
call
1,308
1,974
+666
210
02/19
put
984
1,586
+602
230
10/23
call
326
897
+571
50
12/18
put
1,593
1,047
-546
170
06/16
put
13
513
+500
290
01/15
call
353
820
+467
200
06/17
put
6,934
7,392
+458
220
10/23
put
647
1,049
+402
370
09/17
call
92
493
+401
410
01/21
call
114
505
+391
125
12/17
put
8,755
9,096
+341
Expiration 2026-10-23
ARM open interest, settled 2026-10-21, expiration 2026-10-23, strikes 170 to 280
Strike
Expiry
Type
Prior OI
Settled OI
Change
170
10/23
call
4
4
0
170
10/23
put
115
114
-1
175
10/23
call
1
1
0
175
10/23
put
45
46
+1
180
10/23
call
16
16
0
180
10/23
put
547
551
+4
185
10/23
call
2
2
0
185
10/23
put
254
253
-1
190
10/23
put
414
411
-3
195
10/23
call
0
7
+7
195
10/23
put
861
861
0
197.5
10/23
call
0
7
+7
197.5
10/23
put
106
235
+129
200
10/23
call
21
22
+1
200
10/23
put
1,277
1,268
-9
202.5
10/23
call
30
30
0
202.5
10/23
put
133
210
+77
205
10/23
call
2
2
0
205
10/23
put
476
476
0
207.5
10/23
call
1
1
0
207.5
10/23
put
168
166
-2
210
10/23
call
35
36
+1
210
10/23
put
732
744
+12
212.5
10/23
call
96
96
0
212.5
10/23
put
291
315
+24
215
10/23
call
43
48
+5
215
10/23
put
655
688
+33
217.5
10/23
call
152
151
-1
217.5
10/23
put
380
410
+30
220
10/23
call
238
239
+1
220
10/23
put
647
1,049
+402
222.5
10/23
call
185
286
+101
222.5
10/23
put
360
435
+75
225
10/23
call
131
223
+92
225
10/23
put
507
510
+3
227.5
10/23
call
248
331
+83
227.5
10/23
put
889
869
-20
230
10/23
call
326
897
+571
230
10/23
put
795
742
-53
232.5
10/23
call
259
412
+153
232.5
10/23
put
176
189
+13
235
10/23
call
619
1,369
+750
235
10/23
put
757
725
-32
237.5
10/23
call
801
831
+30
237.5
10/23
put
86
84
-2
240
10/23
call
1,254
1,348
+94
240
10/23
put
869
847
-22
242.5
10/23
call
156
413
+257
242.5
10/23
put
108
92
-16
245
10/23
call
2,228
2,390
+162
245
10/23
put
324
309
-15
247.5
10/23
call
585
699
+114
247.5
10/23
put
94
89
-5
250
10/23
call
1,734
1,984
+250
250
10/23
put
413
341
-72
252.5
10/23
call
2,153
2,296
+143
252.5
10/23
put
88
88
0
255
10/23
call
591
571
-20
255
10/23
put
197
197
0
257.5
10/23
call
1,110
1,125
+15
257.5
10/23
put
265
262
-3
260
10/23
call
767
693
-74
260
10/23
put
204
199
-5
262.5
10/23
call
759
761
+2
262.5
10/23
put
61
50
-11
265
10/23
call
452
433
-19
265
10/23
put
243
218
-25
267.5
10/23
call
135
140
+5
267.5
10/23
put
114
44
-70
270
10/23
call
492
473
-19
270
10/23
put
69
68
-1
272.5
10/23
call
154
155
+1
272.5
10/23
put
27
20
-7
275
10/23
call
865
897
+32
275
10/23
put
107
23
-84
277.5
10/23
call
142
142
0
280
10/23
call
388
385
-3
280
10/23
put
17
17
0
Expiration 2026-10-30
ARM open interest, settled 2026-10-21, expiration 2026-10-30, strikes 175 to 275
Strike
Expiry
Type
Prior OI
Settled OI
Change
175
10/30
put
48
52
+4
180
10/30
call
7
7
0
180
10/30
put
481
501
+20
182.5
10/30
put
2
3
+1
185
10/30
call
2
2
0
185
10/30
put
469
471
+2
187.5
10/30
call
1
1
0
187.5
10/30
put
2
3
+1
190
10/30
call
0
1
+1
190
10/30
put
85
91
+6
192.5
10/30
call
0
1
+1
192.5
10/30
put
0
19
+19
195
10/30
call
1
1
0
195
10/30
put
256
275
+19
197.5
10/30
call
1
1
0
197.5
10/30
put
4
117
+113
200
10/30
call
21
21
0
200
10/30
put
506
508
+2
202.5
10/30
call
2
2
0
202.5
10/30
put
88
121
+33
205
10/30
call
4
4
0
205
10/30
put
1,622
1,628
+6
207.5
10/30
call
1
1
0
207.5
10/30
put
8
27
+19
210
10/30
call
9
8
-1
210
10/30
put
406
424
+18
212.5
10/30
call
2
12
+10
212.5
10/30
put
90
74
-16
215
10/30
call
4
17
+13
215
10/30
put
444
607
+163
217.5
10/30
call
2
3
+1
217.5
10/30
put
84
95
+11
220
10/30
call
55
63
+8
220
10/30
put
1,020
1,044
+24
222.5
10/30
call
52
365
+313
222.5
10/30
put
244
283
+39
225
10/30
call
56
318
+262
225
10/30
put
334
357
+23
227.5
10/30
call
59
136
+77
227.5
10/30
put
34
54
+20
230
10/30
call
132
190
+58
230
10/30
put
617
607
-10
232.5
10/30
call
46
250
+204
232.5
10/30
put
32
32
0
235
10/30
call
122
255
+133
235
10/30
put
428
448
+20
237.5
10/30
call
186
189
+3
237.5
10/30
put
26
30
+4
240
10/30
call
185
263
+78
240
10/30
put
733
716
-17
242.5
10/30
call
221
233
+12
242.5
10/30
put
62
74
+12
245
10/30
call
1,141
1,222
+81
245
10/30
put
360
364
+4
247.5
10/30
call
133
128
-5
247.5
10/30
put
26
27
+1
250
10/30
call
308
506
+198
250
10/30
put
691
691
0
252.5
10/30
call
45
80
+35
252.5
10/30
put
74
74
0
255
10/30
call
228
239
+11
255
10/30
put
643
651
+8
257.5
10/30
call
121
87
-34
257.5
10/30
put
16
17
+1
260
10/30
call
265
308
+43
260
10/30
put
865
852
-13
262.5
10/30
call
303
309
+6
262.5
10/30
put
63
63
0
265
10/30
call
376
562
+186
265
10/30
put
215
213
-2
267.5
10/30
call
36
61
+25
267.5
10/30
put
22
22
0
270
10/30
call
663
660
-3
270
10/30
put
621
614
-7
272.5
10/30
call
384
382
-2
272.5
10/30
put
12
18
+6
275
10/30
call
556
603
+47
275
10/30
put
232
252
+20
Expiration 2026-11-06
ARM open interest, settled 2026-10-21, expiration 2026-11-06, strikes 160 to 305
Strike
Expiry
Type
Prior OI
Settled OI
Change
160
11/06
put
131
106
-25
165
11/06
put
189
200
+11
170
11/06
call
1
1
0
170
11/06
put
76
91
+15
175
11/06
call
1
1
0
175
11/06
put
239
274
+35
180
11/06
call
3
3
0
180
11/06
put
127
232
+105
185
11/06
call
1
1
0
185
11/06
put
65
67
+2
190
11/06
call
1
1
0
190
11/06
put
80
80
0
195
11/06
call
1
1
0
195
11/06
put
91
92
+1
200
11/06
call
42
42
0
200
11/06
put
770
773
+3
205
11/06
call
2
2
0
205
11/06
put
137
142
+5
210
11/06
call
13
13
0
210
11/06
put
227
223
-4
212.5
11/06
call
10
10
0
212.5
11/06
put
36
36
0
215
11/06
call
13
13
0
215
11/06
put
212
214
+2
217.5
11/06
put
14
16
+2
220
11/06
call
26
30
+4
220
11/06
put
279
279
0
222.5
11/06
call
26
26
0
222.5
11/06
put
83
83
0
225
11/06
call
61
85
+24
225
11/06
put
898
895
-3
227.5
11/06
call
157
193
+36
227.5
11/06
put
17
43
+26
230
11/06
call
61
62
+1
230
11/06
put
225
223
-2
232.5
11/06
call
2
3
+1
232.5
11/06
put
15
22
+7
235
11/06
call
25
128
+103
235
11/06
put
520
522
+2
237.5
11/06
call
24
24
0
237.5
11/06
put
60
61
+1
240
11/06
call
139
313
+174
240
11/06
put
817
819
+2
242.5
11/06
call
17
20
+3
242.5
11/06
put
0
6
+6
245
11/06
call
37
42
+5
245
11/06
put
113
113
0
247.5
11/06
call
2
7
+5
250
11/06
call
266
360
+94
250
11/06
put
392
438
+46
252.5
11/06
call
4
5
+1
252.5
11/06
put
1
3
+2
255
11/06
call
95
99
+4
255
11/06
put
103
103
0
257.5
11/06
call
30
39
+9
257.5
11/06
put
0
10
+10
260
11/06
call
244
259
+15
260
11/06
put
208
208
0
265
11/06
call
223
245
+22
265
11/06
put
126
129
+3
270
11/06
call
214
455
+241
270
11/06
put
209
207
-2
275
11/06
call
135
141
+6
275
11/06
put
69
70
+1
280
11/06
call
312
317
+5
280
11/06
put
81
84
+3
285
11/06
call
118
120
+2
285
11/06
put
33
33
0
290
11/06
call
248
248
0
290
11/06
put
62
61
-1
295
11/06
call
163
170
+7
295
11/06
put
78
78
0
300
11/06
call
387
452
+65
300
11/06
put
108
108
0
305
11/06
call
182
179
-3
305
11/06
put
43
43
0
Expiration 2026-11-13
ARM open interest, settled 2026-10-21, expiration 2026-11-13, strikes 160 to 355
Strike
Expiry
Type
Prior OI
Settled OI
Change
160
11/13
put
235
235
0
165
11/13
put
33
33
0
170
11/13
put
31
32
+1
175
11/13
put
44
33
-11
180
11/13
call
1
11
+10
180
11/13
put
132
132
0
185
11/13
put
89
90
+1
190
11/13
call
3
3
0
190
11/13
put
62
63
+1
195
11/13
put
45
146
+101
200
11/13
call
1
1
0
200
11/13
put
66
75
+9
205
11/13
call
4
4
0
205
11/13
put
75
85
+10
210
11/13
call
5
5
0
210
11/13
put
165
166
+1
215
11/13
call
7
10
+3
215
11/13
put
112
110
-2
220
11/13
call
4
105
+101
220
11/13
put
615
952
+337
225
11/13
call
30
26
-4
225
11/13
put
101
99
-2
230
11/13
call
25
27
+2
230
11/13
put
104
106
+2
235
11/13
call
38
43
+5
235
11/13
put
238
238
0
240
11/13
call
300
317
+17
240
11/13
put
87
87
0
245
11/13
call
32
32
0
245
11/13
put
121
122
+1
250
11/13
call
46
49
+3
250
11/13
put
117
118
+1
255
11/13
call
32
33
+1
255
11/13
put
44
45
+1
260
11/13
call
42
60
+18
260
11/13
put
62
62
0
265
11/13
call
169
187
+18
265
11/13
put
80
80
0
270
11/13
call
48
48
0
270
11/13
put
229
229
0
275
11/13
call
43
44
+1
275
11/13
put
224
224
0
280
11/13
call
65
66
+1
280
11/13
put
49
49
0
285
11/13
call
95
109
+14
285
11/13
put
57
57
0
290
11/13
call
152
158
+6
290
11/13
put
7
7
0
295
11/13
call
29
29
0
295
11/13
put
19
19
0
300
11/13
call
163
165
+2
300
11/13
put
17
17
0
305
11/13
call
18
33
+15
305
11/13
put
11
11
0
310
11/13
call
63
81
+18
310
11/13
put
12
12
0
315
11/13
call
29
29
0
315
11/13
put
3
4
+1
320
11/13
call
94
94
0
320
11/13
put
10
10
0
325
11/13
call
11
11
0
325
11/13
put
1
1
0
330
11/13
call
113
112
-1
330
11/13
put
5
5
0
335
11/13
call
15
15
0
335
11/13
put
5
5
0
340
11/13
call
15
16
+1
340
11/13
put
1
1
0
345
11/13
call
10
10
0
350
11/13
call
78
78
0
350
11/13
put
1
1
0
355
11/13
call
10
11
+1
Expiration 2026-11-20
ARM open interest, settled 2026-10-21, expiration 2026-11-20, strikes 145 to 300
Strike
Expiry
Type
Prior OI
Settled OI
Change
145
11/20
call
101
100
-1
145
11/20
put
127
126
-1
150
11/20
call
319
319
0
150
11/20
put
499
499
0
155
11/20
call
34
34
0
155
11/20
put
91
91
0
160
11/20
call
81
81
0
160
11/20
put
465
464
-1
165
11/20
call
115
115
0
165
11/20
put
634
760
+126
170
11/20
call
120
120
0
170
11/20
put
400
374
-26
175
11/20
call
61
61
0
175
11/20
put
1,235
1,216
-19
180
11/20
call
184
186
+2
180
11/20
put
2,307
2,317
+10
185
11/20
call
97
97
0
185
11/20
put
1,560
1,562
+2
190
11/20
call
58
58
0
190
11/20
put
947
944
-3
195
11/20
call
172
172
0
195
11/20
put
1,055
1,064
+9
200
11/20
call
783
786
+3
200
11/20
put
3,262
3,263
+1
205
11/20
call
3
3
0
205
11/20
put
58
95
+37
210
11/20
call
163
163
0
210
11/20
put
1,392
1,395
+3
212.5
11/20
call
5
5
0
212.5
11/20
put
28
51
+23
215
11/20
call
2
4
+2
215
11/20
put
25
346
+321
217.5
11/20
call
9
9
0
217.5
11/20
put
100
102
+2
220
11/20
call
195
252
+57
220
11/20
put
2,512
2,489
-23
222.5
11/20
call
31
65
+34
222.5
11/20
put
127
140
+13
225
11/20
call
1,083
1,178
+95
225
11/20
put
1,166
1,181
+15
227.5
11/20
call
90
99
+9
227.5
11/20
put
156
187
+31
230
11/20
call
273
1,725
+1,452
230
11/20
put
4,034
4,029
-5
232.5
11/20
call
67
81
+14
232.5
11/20
put
67
70
+3
235
11/20
call
191
191
0
235
11/20
put
52
53
+1
237.5
11/20
call
115
116
+1
237.5
11/20
put
34
34
0
240
11/20
call
1,632
1,650
+18
240
11/20
put
3,937
3,966
+29
242.5
11/20
call
57
58
+1
242.5
11/20
put
1
1
0
245
11/20
call
12
31
+19
245
11/20
put
11
11
0
247.5
11/20
call
13
31
+18
247.5
11/20
put
4
4
0
250
11/20
call
1,351
1,524
+173
250
11/20
put
5,615
5,615
0
252.5
11/20
call
43
66
+23
252.5
11/20
put
29
30
+1
255
11/20
call
15
16
+1
255
11/20
put
15
15
0
257.5
11/20
call
9
10
+1
257.5
11/20
put
7
7
0
260
11/20
call
1,932
1,953
+21
260
11/20
put
1,966
1,962
-4
265
11/20
call
30
35
+5
265
11/20
put
2
2
0
270
11/20
call
1,454
1,483
+29
270
11/20
put
2,685
2,682
-3
275
11/20
call
74
102
+28
275
11/20
put
1
1
0
280
11/20
call
855
888
+33
280
11/20
put
1,087
1,088
+1
290
11/20
call
1,402
1,416
+14
290
11/20
put
1,631
1,631
0
300
11/20
call
4,182
4,246
+64
300
11/20
put
1,332
1,331
-1
Expiration 2026-11-27
ARM open interest, settled 2026-10-21, expiration 2026-11-27, strikes 155 to 350
Strike
Expiry
Type
Prior OI
Settled OI
Change
155
11/27
put
2
2
0
160
11/27
call
2
2
0
160
11/27
put
20
20
0
165
11/27
call
2
2
0
165
11/27
put
7
8
+1
170
11/27
call
7
7
0
170
11/27
put
136
136
0
175
11/27
call
6
6
0
175
11/27
put
14
14
0
180
11/27
call
2
2
0
180
11/27
put
18
22
+4
185
11/27
call
2
2
0
185
11/27
put
38
37
-1
190
11/27
call
3
3
0
190
11/27
put
24
34
+10
195
11/27
call
4
4
0
195
11/27
put
30
30
0
200
11/27
call
3
3
0
200
11/27
put
51
64
+13
205
11/27
call
4
4
0
205
11/27
put
103
104
+1
210
11/27
call
9
9
0
210
11/27
put
45
45
0
215
11/27
put
215
217
+2
220
11/27
call
16
17
+1
220
11/27
put
71
73
+2
225
11/27
call
12
14
+2
225
11/27
put
70
70
0
230
11/27
call
10
11
+1
230
11/27
put
253
252
-1
235
11/27
call
63
62
-1
235
11/27
put
33
37
+4
240
11/27
call
9
10
+1
240
11/27
put
67
65
-2
245
11/27
call
23
13
-10
245
11/27
put
27
27
0
250
11/27
call
9
11
+2
250
11/27
put
36
32
-4
255
11/27
call
5
7
+2
255
11/27
put
28
28
0
260
11/27
call
17
18
+1
260
11/27
put
27
28
+1
265
11/27
call
3
3
0
265
11/27
put
20
21
+1
270
11/27
call
15
18
+3
270
11/27
put
11
17
+6
275
11/27
call
7
16
+9
275
11/27
put
15
15
0
280
11/27
call
18
24
+6
280
11/27
put
11
11
0
285
11/27
call
37
42
+5
285
11/27
put
3
3
0
290
11/27
call
18
29
+11
290
11/27
put
5
5
0
295
11/27
call
12
12
0
295
11/27
put
3
3
0
300
11/27
call
70
79
+9
300
11/27
put
2
2
0
305
11/27
call
18
20
+2
310
11/27
call
14
14
0
310
11/27
put
1
6
+5
315
11/27
call
17
17
0
315
11/27
put
6
11
+5
320
11/27
call
5
5
0
320
11/27
put
11
11
0
325
11/27
call
6
6
0
325
11/27
put
2
2
0
330
11/27
call
47
48
+1
330
11/27
put
2
2
0
335
11/27
call
2
2
0
335
11/27
put
1
1
0
340
11/27
call
2
2
0
340
11/27
put
1
1
0
345
11/27
call
3
5
+2
345
11/27
put
2
2
0
350
11/27
call
14
14
0
Later expirations (2026-12-18, 2027-01-15, 2027-02-19, 2027-03-19, 2027-04-16, 2027-06-17, 2027-09-17, 2027-12-17, 2028-01-21, 2028-06-16, 2028-12-15, 2029-01-19) and all other strikes are in the Markdown table.