FIS Options Open Interest by Strike, Oct 21 Settlement
FIS 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 14 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, 443 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 29 to 44. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
FIS: largest changes in the full book, settled 2026-10-21 vs 2026-10-20
Strike
Expiry
Type
Prior OI
Settled OI
Change
42
11/06
call
4
67
+63
38
10/30
call
84
128
+44
39
11/06
call
6
46
+40
40
11/20
call
398
436
+38
45
01/15
call
314
350
+36
37
10/23
call
578
612
+34
39
10/23
call
12
45
+33
37.5
01/15
call
471
499
+28
38
10/23
call
140
164
+24
40
10/23
call
6
29
+23
34
11/06
call
23
1
-22
38
11/06
call
25
40
+15
24
10/23
call
0
13
+13
25
10/23
call
0
13
+13
45
06/17
call
2,933
2,921
-12
Expiration 2026-10-23
FIS open interest, settled 2026-10-21, expiration 2026-10-23, strikes 23 to 55
Strike
Expiry
Type
Prior OI
Settled OI
Change
23
10/23
call
0
1
+1
23
10/23
put
4
4
0
24
10/23
call
0
13
+13
24
10/23
put
2
2
0
25
10/23
call
0
13
+13
25
10/23
put
2
2
0
26
10/23
call
0
1
+1
26
10/23
put
2
2
0
27
10/23
call
0
3
+3
27
10/23
put
1
1
0
28
10/23
call
4
5
+1
29
10/23
call
4
4
0
29
10/23
put
1
1
0
30
10/23
call
1
1
0
30
10/23
put
4
4
0
31
10/23
call
18
18
0
31
10/23
put
35
35
0
32
10/23
call
5
4
-1
32
10/23
put
38
38
0
33
10/23
call
4
4
0
33
10/23
put
50
50
0
34
10/23
call
39
39
0
34
10/23
put
13
13
0
35
10/23
call
65
64
-1
35
10/23
put
345
344
-1
36
10/23
call
117
117
0
36
10/23
put
77
81
+4
37
10/23
call
578
612
+34
37
10/23
put
16
26
+10
38
10/23
call
140
164
+24
38
10/23
put
3
3
0
39
10/23
call
12
45
+33
39
10/23
put
21
21
0
40
10/23
call
6
29
+23
41
10/23
call
20
20
0
42
10/23
call
8
8
0
43
10/23
call
8
8
0
44
10/23
call
7
7
0
45
10/23
call
2
2
0
46
10/23
put
1
1
0
50
10/23
put
0
1
+1
51
10/23
put
0
1
+1
55
10/23
call
2
2
0
Expiration 2026-10-30
FIS open interest, settled 2026-10-21, expiration 2026-10-30, strikes 28 to 50
Strike
Expiry
Type
Prior OI
Settled OI
Change
28
10/30
put
1
1
0
29
10/30
put
17
17
0
30
10/30
call
5
5
0
30
10/30
put
30
30
0
31
10/30
call
35
35
0
31
10/30
put
18
18
0
32
10/30
call
5
5
0
32
10/30
put
19
19
0
33
10/30
call
18
18
0
33
10/30
put
44
45
+1
34
10/30
call
23
23
0
34
10/30
put
142
139
-3
35
10/30
call
15
15
0
35
10/30
put
45
50
+5
36
10/30
call
133
133
0
36
10/30
put
8
8
0
37
10/30
call
122
122
0
37
10/30
put
6
6
0
38
10/30
call
84
128
+44
38
10/30
put
1
1
0
39
10/30
call
64
65
+1
39
10/30
put
4
4
0
40
10/30
call
53
55
+2
40
10/30
put
2
2
0
41
10/30
call
49
49
0
42
10/30
call
2
2
0
43
10/30
call
5
5
0
44
10/30
call
4
4
0
45
10/30
call
2
2
0
49
10/30
put
1
0
-1
50
10/30
call
1
1
0
Expiration 2026-11-06
FIS open interest, settled 2026-10-21, expiration 2026-11-06, strikes 25 to 42
Strike
Expiry
Type
Prior OI
Settled OI
Change
25
11/06
put
5
5
0
28
11/06
call
673
673
0
29
11/06
put
7
7
0
30
11/06
call
37
37
0
30
11/06
put
19
16
-3
31
11/06
call
1
1
0
31
11/06
put
3
3
0
32
11/06
call
40
40
0
32
11/06
put
13
15
+2
33
11/06
call
12
12
0
33
11/06
put
13
12
-1
34
11/06
call
23
1
-22
34
11/06
put
7
7
0
35
11/06
call
32
32
0
35
11/06
put
24
25
+1
36
11/06
call
8
8
0
36
11/06
put
5
5
0
37
11/06
call
30
30
0
38
11/06
call
25
40
+15
38
11/06
put
1
1
0
39
11/06
call
6
46
+40
40
11/06
call
41
41
0
41
11/06
call
8
8
0
42
11/06
call
4
67
+63
Expiration 2026-11-13
FIS open interest, settled 2026-10-21, expiration 2026-11-13, strikes 29 to 45
Strike
Expiry
Type
Prior OI
Settled OI
Change
29
11/13
put
2
2
0
30
11/13
put
3
3
0
31
11/13
put
18
19
+1
32
11/13
put
29
29
0
33
11/13
call
15
15
0
33
11/13
put
74
74
0
34
11/13
call
4
4
0
34
11/13
put
22
22
0
35
11/13
call
3
3
0
35
11/13
put
2
12
+10
36
11/13
call
16
16
0
36
11/13
put
33
33
0
37
11/13
call
12
12
0
37
11/13
put
15
15
0
38
11/13
call
63
62
-1
38
11/13
put
3
3
0
39
11/13
call
19
19
0
40
11/13
call
50
51
+1
41
11/13
call
1
1
0
42
11/13
call
3
3
0
45
11/13
call
1
1
0
Expiration 2026-11-20
FIS open interest, settled 2026-10-21, expiration 2026-11-20, strikes 20 to 50
Strike
Expiry
Type
Prior OI
Settled OI
Change
20
11/20
put
3
3
0
25
11/20
put
14
14
0
27.5
11/20
put
86
86
0
30
11/20
call
16
16
0
30
11/20
put
286
286
0
32
11/20
put
0
1
+1
32.5
11/20
call
83
83
0
32.5
11/20
put
495
497
+2
33
11/20
put
1
6
+5
35
11/20
call
351
353
+2
35
11/20
put
220
220
0
36
11/20
call
10
14
+4
37
11/20
call
34
35
+1
37
11/20
put
24
24
0
37.5
11/20
call
577
577
0
37.5
11/20
put
411
411
0
38
11/20
call
1
1
0
40
11/20
call
398
436
+38
40
11/20
put
42
42
0
41
11/20
call
4
5
+1
42
11/20
call
5
6
+1
42.5
11/20
call
478
488
+10
42.5
11/20
put
21
21
0
43
11/20
call
2
2
0
45
11/20
call
72
74
+2
47.5
11/20
call
11
11
0
50
11/20
call
12
12
0
Expiration 2026-11-27
FIS open interest, settled 2026-10-21, expiration 2026-11-27, strikes 30 to 42
Strike
Expiry
Type
Prior OI
Settled OI
Change
30
11/27
put
0
3
+3
31
11/27
put
0
3
+3
32
11/27
put
0
1
+1
34
11/27
put
3
3
0
35
11/27
call
1
2
+1
35
11/27
put
2
2
0
36
11/27
put
5
8
+3
37
11/27
call
52
52
0
37
11/27
put
4
4
0
38
11/27
put
3
3
0
39
11/27
call
4
4
0
42
11/27
call
3
5
+2
Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-04-16, 2027-06-17, 2027-09-17, 2028-01-21, 2029-01-19) and all other strikes are in the Markdown table.