OPEN Options Open Interest by Strike, Oct 21 Settlement
OPEN 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 16 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, 313 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 2 to 2. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
OPEN: largest changes in the full book, settled 2026-10-21 vs 2026-10-20
Strike
Expiry
Type
Prior OI
Settled OI
Change
5
01/21
call
50,697
56,149
+5,452
1
01/19
call
972
2,961
+1,989
2
10/23
put
10,530
8,752
-1,778
15
01/21
call
36,888
37,888
+1,000
2.5
10/30
call
10,479
11,448
+969
3
01/19
call
7,065
7,940
+875
2
10/23
call
8,995
9,833
+838
4.5
01/15
put
1,221
621
-600
2
01/19
put
1,690
1,321
-369
7
01/15
call
63,200
62,873
-327
2
01/19
call
3,694
4,011
+317
2.5
10/23
call
15,457
15,768
+311
3
05/21
call
869
1,179
+310
3
02/19
call
5,693
5,999
+306
9
11/20
call
13,348
13,648
+300
Expiration 2026-10-23
OPEN open interest, settled 2026-10-21, expiration 2026-10-23, strikes 0.5 to 6.5
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
10/23
call
188
195
+7
0.5
10/23
put
24
24
0
1
10/23
call
51
53
+2
1
10/23
put
0
2
+2
1.5
10/23
call
413
380
-33
1.5
10/23
put
298
299
+1
2
10/23
call
8,995
9,833
+838
2
10/23
put
10,530
8,752
-1,778
2.5
10/23
call
15,457
15,768
+311
2.5
10/23
put
650
645
-5
3
10/23
call
9,522
9,522
0
3
10/23
put
100
96
-4
3.5
10/23
call
3,110
3,110
0
3.5
10/23
put
296
205
-91
4
10/23
call
713
713
0
4
10/23
put
5
5
0
4.5
10/23
call
1,442
1,442
0
4.5
10/23
put
5
7
+2
5
10/23
call
164
173
+9
5
10/23
put
7
15
+8
5.5
10/23
call
3
3
0
5.5
10/23
put
6
5
-1
6
10/23
call
5
5
0
6
10/23
put
6
2
-4
6.5
10/23
call
6
6
0
6.5
10/23
put
3
7
+4
Expiration 2026-10-30
OPEN open interest, settled 2026-10-21, expiration 2026-10-30, strikes 0.5 to 6
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
10/30
call
26
26
0
0.5
10/30
put
5
5
0
1
10/30
call
23
23
0
1.5
10/30
call
29
39
+10
1.5
10/30
put
189
190
+1
2
10/30
call
1,667
1,862
+195
2
10/30
put
2,432
2,323
-109
2.5
10/30
call
10,479
11,448
+969
2.5
10/30
put
1,208
1,131
-77
3
10/30
call
4,899
4,999
+100
3
10/30
put
249
225
-24
3.5
10/30
call
1,375
1,375
0
3.5
10/30
put
213
213
0
4
10/30
call
677
677
0
4
10/30
put
2
2
0
4.5
10/30
call
98
98
0
4.5
10/30
put
15
15
0
5
10/30
call
8
8
0
5
10/30
put
6
6
0
5.5
10/30
call
1
1
0
5.5
10/30
put
1
1
0
6
10/30
call
2
2
0
Expiration 2026-11-06
OPEN open interest, settled 2026-10-21, expiration 2026-11-06, strikes 0.5 to 5.5
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
11/06
call
102
105
+3
1
11/06
call
30
30
0
1
11/06
put
510
510
0
1.5
11/06
call
170
170
0
1.5
11/06
put
631
635
+4
2
11/06
call
478
650
+172
2
11/06
put
854
857
+3
2.5
11/06
call
2,565
2,748
+183
2.5
11/06
put
131
133
+2
3
11/06
call
2,349
2,362
+13
3
11/06
put
30
30
0
3.5
11/06
call
1,727
1,728
+1
3.5
11/06
put
23
23
0
4
11/06
call
134
134
0
4.5
11/06
call
33
33
0
4.5
11/06
put
1
1
0
5
11/06
call
24
24
0
5
11/06
put
4
3
-1
5.5
11/06
call
6
6
0
5.5
11/06
put
1
1
0
Expiration 2026-11-13
OPEN open interest, settled 2026-10-21, expiration 2026-11-13, strikes 0.5 to 4.5
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
11/13
call
24
25
+1
1
11/13
call
4
7
+3
1.5
11/13
call
32
42
+10
1.5
11/13
put
2,979
2,990
+11
2
11/13
call
738
767
+29
2
11/13
put
804
1,081
+277
2.5
11/13
call
1,839
1,763
-76
2.5
11/13
put
598
606
+8
3
11/13
call
595
595
0
3
11/13
put
16
16
0
3.5
11/13
call
135
135
0
3.5
11/13
put
7
8
+1
4
11/13
call
215
216
+1
4
11/13
put
1
1
0
4.5
11/13
call
289
289
0
4.5
11/13
put
1
1
0
Expiration 2026-11-20
OPEN open interest, settled 2026-10-21, expiration 2026-11-20, strikes 0.5 to 15
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
11/20
call
1
1
0
1
11/20
call
1,465
1,495
+30
1
11/20
put
1,044
1,044
0
1.5
11/20
put
0
1
+1
2
11/20
call
7,444
7,668
+224
2
11/20
put
5,146
5,172
+26
2.5
11/20
call
960
1,048
+88
2.5
11/20
put
4
4
0
3
11/20
call
17,516
17,577
+61
3
11/20
put
2,779
2,770
-9
3.5
11/20
call
4
4
0
3.5
11/20
put
21
41
+20
4
11/20
call
18,023
17,966
-57
4
11/20
put
3,799
3,799
0
4.5
11/20
put
2
0
-2
5
11/20
call
13,238
13,153
-85
5
11/20
put
769
769
0
6
11/20
call
9,286
9,316
+30
6
11/20
put
1,014
1,014
0
7
11/20
call
6,892
7,012
+120
7
11/20
put
232
232
0
8
11/20
call
10,906
10,917
+11
8
11/20
put
63
63
0
9
11/20
call
13,348
13,648
+300
9
11/20
put
1
1
0
10
11/20
call
9,366
9,365
-1
11
11/20
call
686
686
0
12
11/20
call
7,202
7,202
0
15
11/20
call
12,803
12,803
0
Expiration 2026-11-27
OPEN open interest, settled 2026-10-21, expiration 2026-11-27, strikes 0.5 to 4.5
Strike
Expiry
Type
Prior OI
Settled OI
Change
0.5
11/27
call
4
3
-1
1
11/27
call
2
2
0
1.5
11/27
call
0
9
+9
1.5
11/27
put
1,762
1,791
+29
2
11/27
call
105
123
+18
2
11/27
put
788
762
-26
2.5
11/27
call
284
308
+24
2.5
11/27
put
237
237
0
3
11/27
call
161
161
0
3
11/27
put
5
5
0
3.5
11/27
call
82
82
0
3.5
11/27
put
26
27
+1
4
11/27
call
13
13
0
4
11/27
put
1
1
0
4.5
11/27
call
26
27
+1
4.5
11/27
put
6
6
0
Later expirations (2026-12-18, 2027-01-15, 2027-02-19, 2027-05-21, 2027-12-17, 2028-01-21, 2028-03-17, 2028-06-16, 2028-09-15, 2029-01-19) and all other strikes are in the Markdown table.