CME Options Open Interest by Strike, Oct 21 Settlement
CME 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 13 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, 605 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 236 to 354. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
CME: largest changes in the full book, settled 2026-10-21 vs 2026-10-20
Strike
Expiry
Type
Prior OI
Settled OI
Change
320
10/23
call
16
711
+695
315
10/23
call
682
287
-395
265
11/20
put
0
330
+330
282.5
10/23
put
2
307
+305
267.5
10/23
put
7
280
+273
265
11/27
put
2
249
+247
300
10/23
put
700
462
-238
302.5
10/23
put
700
462
-238
250
10/23
put
68
269
+201
280
10/23
put
27
198
+171
275
10/23
put
42
184
+142
295
10/23
put
3
128
+125
310
11/13
call
207
102
-105
300
03/19
put
286
388
+102
290
10/23
put
12
113
+101
Expiration 2026-10-23
CME open interest, settled 2026-10-21, expiration 2026-10-23, strikes 237.5 to 355
Strike
Expiry
Type
Prior OI
Settled OI
Change
237.5
10/23
put
1
2
+1
240
10/23
put
39
39
0
245
10/23
put
16
16
0
247.5
10/23
put
0
3
+3
250
10/23
put
68
269
+201
255
10/23
call
1
1
0
255
10/23
put
28
38
+10
257.5
10/23
put
4
4
0
260
10/23
call
5
5
0
260
10/23
put
18
12
-6
262.5
10/23
put
6
6
0
265
10/23
call
18
18
0
265
10/23
put
94
95
+1
267.5
10/23
call
3
3
0
267.5
10/23
put
7
280
+273
270
10/23
call
104
104
0
270
10/23
put
14
96
+82
272.5
10/23
call
5
5
0
272.5
10/23
put
4
27
+23
275
10/23
call
19
15
-4
275
10/23
put
42
184
+142
277.5
10/23
call
6
6
0
277.5
10/23
put
2
64
+62
280
10/23
call
25
17
-8
280
10/23
put
27
198
+171
282.5
10/23
call
3
3
0
282.5
10/23
put
2
307
+305
285
10/23
call
80
55
-25
285
10/23
put
86
163
+77
287.5
10/23
call
78
97
+19
287.5
10/23
put
41
69
+28
290
10/23
call
105
113
+8
290
10/23
put
12
113
+101
292.5
10/23
call
11
14
+3
292.5
10/23
put
6
85
+79
295
10/23
call
32
125
+93
295
10/23
put
3
128
+125
297.5
10/23
call
17
49
+32
297.5
10/23
put
0
1
+1
300
10/23
call
690
729
+39
300
10/23
put
700
462
-238
302.5
10/23
call
90
108
+18
302.5
10/23
put
700
462
-238
305
10/23
call
42
100
+58
307.5
10/23
call
15
19
+4
310
10/23
call
17
65
+48
312.5
10/23
call
0
24
+24
315
10/23
call
682
287
-395
317.5
10/23
call
0
37
+37
320
10/23
call
16
711
+695
322.5
10/23
call
2
22
+20
325
10/23
call
3
6
+3
327.5
10/23
call
4
4
0
330
10/23
call
0
18
+18
335
10/23
call
0
10
+10
345
10/23
call
1
5
+4
350
10/23
call
2
2
0
355
10/23
call
1
1
0
Expiration 2026-10-30
CME open interest, settled 2026-10-21, expiration 2026-10-30, strikes 235 to 355
Strike
Expiry
Type
Prior OI
Settled OI
Change
235
10/30
put
5
5
0
240
10/30
put
10
10
0
245
10/30
put
12
12
0
250
10/30
put
11
11
0
255
10/30
call
2
2
0
255
10/30
put
45
55
+10
257.5
10/30
put
2
2
0
260
10/30
call
2
2
0
260
10/30
put
22
32
+10
265
10/30
call
34
33
-1
265
10/30
put
13
13
0
267.5
10/30
put
102
102
0
270
10/30
call
28
28
0
270
10/30
put
36
42
+6
272.5
10/30
call
1
1
0
272.5
10/30
put
0
9
+9
275
10/30
call
7
7
0
275
10/30
put
12
14
+2
277.5
10/30
call
1
1
0
277.5
10/30
put
0
15
+15
280
10/30
call
70
60
-10
280
10/30
put
38
38
0
282.5
10/30
call
5
5
0
282.5
10/30
put
0
4
+4
285
10/30
call
36
39
+3
285
10/30
put
0
2
+2
287.5
10/30
call
2
1
-1
290
10/30
call
47
49
+2
290
10/30
put
1
5
+4
292.5
10/30
call
1
1
0
295
10/30
call
34
16
-18
295
10/30
put
0
2
+2
297.5
10/30
call
25
29
+4
300
10/30
call
6
12
+6
300
10/30
put
1
1
0
302.5
10/30
call
1
2
+1
305
10/30
call
7
12
+5
307.5
10/30
call
0
7
+7
310
10/30
call
68
85
+17
312.5
10/30
call
0
6
+6
317.5
10/30
call
0
16
+16
320
10/30
call
3
38
+35
322.5
10/30
call
0
41
+41
327.5
10/30
call
0
4
+4
355
10/30
call
1
1
0
Expiration 2026-11-06
CME open interest, settled 2026-10-21, expiration 2026-11-06, strikes 240 to 355
Strike
Expiry
Type
Prior OI
Settled OI
Change
240
11/06
put
12
12
0
250
11/06
put
2
2
0
255
11/06
put
13
13
0
260
11/06
call
14
14
0
260
11/06
put
14
14
0
265
11/06
call
34
33
-1
265
11/06
put
1
1
0
270
11/06
call
8
8
0
270
11/06
put
13
13
0
275
11/06
call
2
2
0
275
11/06
put
3
3
0
280
11/06
call
7
7
0
280
11/06
put
1
1
0
285
11/06
call
7
7
0
285
11/06
put
2
3
+1
287.5
11/06
put
1
1
0
290
11/06
call
6
9
+3
290
11/06
put
1
3
+2
292.5
11/06
put
0
2
+2
295
11/06
call
9
15
+6
295
11/06
put
1
3
+2
297.5
11/06
call
0
3
+3
297.5
11/06
put
3
3
0
300
11/06
call
15
16
+1
302.5
11/06
call
0
2
+2
305
11/06
call
3
3
0
307.5
11/06
call
0
1
+1
310
11/06
call
4
4
0
315
11/06
call
0
1
+1
340
11/06
call
2
2
0
345
11/06
call
1
1
0
350
11/06
call
1
1
0
355
11/06
call
1
1
0
Expiration 2026-11-13
CME open interest, settled 2026-10-21, expiration 2026-11-13, strikes 230 to 325
Strike
Expiry
Type
Prior OI
Settled OI
Change
230
11/13
put
250
250
0
240
11/13
put
250
250
0
255
11/13
put
4
4
0
260
11/13
put
13
13
0
265
11/13
call
5
5
0
265
11/13
put
13
13
0
270
11/13
call
2
2
0
270
11/13
put
0
1
+1
275
11/13
call
5
5
0
275
11/13
put
10
10
0
280
11/13
call
4
11
+7
280
11/13
put
0
2
+2
285
11/13
call
20
20
0
285
11/13
put
80
80
0
290
11/13
call
26
26
0
295
11/13
call
31
31
0
295
11/13
put
0
1
+1
300
11/13
call
103
104
+1
305
11/13
put
3
3
0
310
11/13
call
207
102
-105
310
11/13
put
0
1
+1
315
11/13
call
41
45
+4
325
11/13
call
3
3
0
Expiration 2026-11-20
CME open interest, settled 2026-10-21, expiration 2026-11-20, strikes 135 to 410
Strike
Expiry
Type
Prior OI
Settled OI
Change
135
11/20
call
5
5
0
195
11/20
put
10
10
0
200
11/20
put
6
6
0
210
11/20
put
32
32
0
220
11/20
put
160
160
0
230
11/20
call
5
5
0
230
11/20
put
323
323
0
240
11/20
put
415
450
+35
250
11/20
call
1
1
0
250
11/20
put
540
552
+12
255
11/20
put
0
38
+38
260
11/20
call
8
8
0
260
11/20
put
310
308
-2
265
11/20
put
0
330
+330
267.5
11/20
call
0
1
+1
270
11/20
call
412
411
-1
270
11/20
put
198
201
+3
277.5
11/20
put
0
1
+1
280
11/20
call
244
236
-8
280
11/20
put
97
99
+2
285
11/20
put
82
92
+10
287.5
11/20
call
1
1
0
287.5
11/20
put
4
4
0
290
11/20
call
334
334
0
290
11/20
put
71
72
+1
292.5
11/20
put
23
25
+2
295
11/20
call
2
13
+11
295
11/20
put
4
6
+2
297.5
11/20
call
4
5
+1
300
11/20
call
353
354
+1
300
11/20
put
42
44
+2
305
11/20
call
1
12
+11
307.5
11/20
call
4
12
+8
310
11/20
call
644
655
+11
315
11/20
call
29
32
+3
320
11/20
call
109
122
+13
325
11/20
call
0
12
+12
330
11/20
call
30
62
+32
340
11/20
call
55
55
0
350
11/20
call
0
26
+26
360
11/20
call
1
1
0
370
11/20
call
1
1
0
380
11/20
call
3
3
0
390
11/20
call
1
1
0
400
11/20
call
2
2
0
410
11/20
call
0
1
+1
Expiration 2026-11-27
CME open interest, settled 2026-10-21, expiration 2026-11-27, strikes 230 to 335
Strike
Expiry
Type
Prior OI
Settled OI
Change
230
11/27
put
28
28
0
245
11/27
put
10
10
0
255
11/27
put
41
79
+38
260
11/27
put
10
73
+63
265
11/27
call
4
5
+1
265
11/27
put
2
249
+247
270
11/27
call
2
2
0
270
11/27
put
0
1
+1
275
11/27
call
10
10
0
275
11/27
put
3
3
0
280
11/27
call
4
4
0
280
11/27
put
7
7
0
285
11/27
call
4
5
+1
290
11/27
call
6
6
0
295
11/27
call
0
1
+1
295
11/27
put
1
1
0
300
11/27
call
6
6
0
300
11/27
put
1
1
0
305
11/27
call
47
47
0
305
11/27
put
1
1
0
310
11/27
call
0
12
+12
315
11/27
call
0
1
+1
320
11/27
call
1
2
+1
325
11/27
call
1
1
0
330
11/27
call
0
1
+1
335
11/27
call
1
1
0
Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-06-17, 2027-09-17, 2028-01-21, 2029-01-19) and all other strikes are in the Markdown table.