# MCO Options Open Interest by Strike, Oct 21 Settlement

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.

## Expiration 2026-11-20

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 220 | put | 4 | 4 | 0 |
| 230 | put | 2 | 2 | 0 |
| 240 | put | 3 | 3 | 0 |
| 250 | put | 26 | 26 | 0 |
| 260 | put | 3 | 3 | 0 |
| 270 | put | 2 | 2 | 0 |
| 280 | put | 3 | 3 | 0 |
| 290 | put | 1 | 1 | 0 |
| 300 | call | 2 | 2 | 0 |
| 300 | put | 41 | 41 | 0 |
| 310 | call | 1 | 1 | 0 |
| 310 | put | 6 | 6 | 0 |
| 320 | put | 6 | 6 | 0 |
| 330 | put | 10 | 10 | 0 |
| 340 | put | 23 | 23 | 0 |
| 350 | put | 19 | 45 | +26 |
| 360 | put | 55 | 57 | +2 |
| 370 | call | 3 | 3 | 0 |
| 370 | put | 84 | 84 | 0 |
| 380 | call | 4 | 4 | 0 |
| 380 | put | 13 | 13 | 0 |
| 390 | call | 2 | 2 | 0 |
| 390 | put | 27 | 29 | +2 |
| 400 | put | 172 | 194 | +22 |
| 410 | put | 106 | 131 | +25 |
| 420 | call | 1 | 1 | 0 |
| 420 | put | 97 | 117 | +20 |
| 430 | put | 110 | 122 | +12 |
| 440 | call | 12 | 12 | 0 |
| 440 | put | 140 | 184 | +44 |
| 450 | call | 36 | 36 | 0 |
| 450 | put | 671 | 700 | +29 |
| 460 | call | 76 | 76 | 0 |
| 460 | put | 36 | 250 | +214 |
| 470 | call | 65 | 57 | -8 |
| 470 | put | 74 | 220 | +146 |
| 480 | call | 51 | 54 | +3 |
| 480 | put | 63 | 81 | +18 |
| 490 | call | 1116 | 1151 | +35 |
| 490 | put | 70 | 70 | 0 |
| 500 | call | 147 | 159 | +12 |
| 500 | put | 10 | 10 | 0 |
| 510 | call | 1136 | 1140 | +4 |
| 510 | put | 4 | 4 | 0 |
| 520 | call | 108 | 108 | 0 |
| 520 | put | 2 | 2 | 0 |
| 530 | call | 106 | 107 | +1 |
| 540 | call | 51 | 79 | +28 |
| 550 | call | 227 | 256 | +29 |
| 560 | call | 24 | 24 | 0 |
| 570 | call | 18 | 40 | +22 |
| 580 | call | 27 | 28 | +1 |
| 590 | call | 7 | 7 | 0 |
| 600 | call | 4 | 6 | +2 |
| 610 | call | 35 | 35 | 0 |
| 620 | call | 22 | 22 | 0 |
| 630 | call | 1 | 1 | 0 |
| 640 | call | 115 | 115 | 0 |
| 650 | call | 4 | 4 | 0 |
| 660 | call | 6 | 6 | 0 |
| 670 | call | 3 | 3 | 0 |
| 680 | call | 5 | 131 | +126 |

## Expiration 2026-12-18

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 350 | put | 1 | 1 | 0 |
| 400 | put | 2 | 2 | 0 |
| 410 | put | 1 | 1 | 0 |
| 420 | put | 2 | 18 | +16 |
| 430 | put | 0 | 14 | +14 |
| 440 | put | 2 | 2 | 0 |
| 450 | put | 0 | 2 | +2 |
| 460 | put | 7 | 7 | 0 |
| 470 | put | 1 | 1 | 0 |
| 480 | call | 0 | 4 | +4 |
| 480 | put | 2 | 4 | +2 |
| 490 | call | 2 | 13 | +11 |
| 490 | put | 2 | 2 | 0 |
| 500 | call | 1 | 2 | +1 |
| 510 | call | 3 | 20 | +17 |
| 520 | call | 2 | 2 | 0 |
| 530 | call | 7 | 21 | +14 |
| 540 | call | 0 | 12 | +12 |
| 570 | call | 2 | 2 | 0 |
| 590 | call | 4 | 4 | 0 |

## Expiration 2027-01-15

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 220 | put | 14 | 14 | 0 |
| 240 | put | 1 | 1 | 0 |
| 250 | put | 6 | 6 | 0 |
| 260 | put | 2 | 2 | 0 |
| 270 | put | 7 | 7 | 0 |
| 280 | put | 18 | 18 | 0 |
| 290 | put | 15 | 15 | 0 |
| 300 | call | 150 | 150 | 0 |
| 300 | put | 14 | 14 | 0 |
| 310 | put | 10 | 10 | 0 |
| 320 | call | 1 | 1 | 0 |
| 320 | put | 9 | 9 | 0 |
| 330 | put | 14 | 14 | 0 |
| 340 | call | 1 | 1 | 0 |
| 340 | put | 8 | 8 | 0 |
| 350 | call | 4 | 4 | 0 |
| 350 | put | 52 | 52 | 0 |
| 360 | put | 16 | 16 | 0 |
| 370 | put | 10 | 10 | 0 |
| 380 | call | 9 | 9 | 0 |
| 380 | put | 13 | 13 | 0 |
| 390 | call | 3 | 3 | 0 |
| 390 | put | 15 | 15 | 0 |
| 400 | call | 3 | 3 | 0 |
| 400 | put | 125 | 121 | -4 |
| 410 | put | 22 | 22 | 0 |
| 420 | call | 2 | 2 | 0 |
| 420 | put | 24 | 23 | -1 |
| 430 | call | 27 | 27 | 0 |
| 430 | put | 23 | 25 | +2 |
| 440 | call | 5 | 5 | 0 |
| 440 | put | 88 | 88 | 0 |
| 450 | call | 27 | 27 | 0 |
| 450 | put | 169 | 170 | +1 |
| 460 | call | 176 | 176 | 0 |
| 460 | put | 42 | 42 | 0 |
| 470 | call | 11 | 11 | 0 |
| 470 | put | 40 | 40 | 0 |
| 480 | call | 99 | 97 | -2 |
| 480 | put | 82 | 82 | 0 |
| 490 | call | 60 | 60 | 0 |
| 490 | put | 61 | 61 | 0 |
| 500 | call | 62 | 62 | 0 |
| 500 | put | 14 | 14 | 0 |
| 510 | call | 69 | 69 | 0 |
| 510 | put | 10 | 46 | +36 |
| 520 | call | 66 | 67 | +1 |
| 530 | call | 37 | 37 | 0 |
| 530 | put | 2 | 2 | 0 |
| 540 | call | 48 | 48 | 0 |
| 550 | call | 49 | 49 | 0 |
| 550 | put | 1 | 1 | 0 |
| 560 | call | 37 | 37 | 0 |
| 570 | call | 17 | 17 | 0 |
| 580 | call | 29 | 29 | 0 |
| 590 | call | 7 | 7 | 0 |
| 600 | call | 21 | 21 | 0 |
| 610 | call | 1 | 1 | 0 |
| 620 | call | 1 | 1 | 0 |
| 630 | call | 2 | 2 | 0 |
| 640 | call | 1 | 1 | 0 |
| 650 | call | 2 | 2 | 0 |
| 660 | call | 6 | 6 | 0 |
| 670 | call | 2 | 2 | 0 |
| 680 | call | 8 | 8 | 0 |
| 700 | call | 3 | 3 | 0 |
| 720 | call | 13 | 13 | 0 |

## Expiration 2027-02-19

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 260 | put | 4 | 4 | 0 |
| 270 | put | 2 | 2 | 0 |
| 290 | put | 5 | 5 | 0 |
| 300 | put | 5 | 5 | 0 |
| 310 | put | 7 | 7 | 0 |
| 320 | put | 5 | 5 | 0 |
| 330 | put | 6 | 6 | 0 |
| 340 | call | 1 | 1 | 0 |
| 340 | put | 7 | 7 | 0 |
| 350 | put | 3 | 3 | 0 |
| 370 | put | 1 | 1 | 0 |
| 380 | put | 2 | 2 | 0 |
| 390 | put | 74 | 74 | 0 |
| 400 | call | 2 | 2 | 0 |
| 400 | put | 15 | 15 | 0 |
| 410 | call | 3 | 3 | 0 |
| 410 | put | 22 | 22 | 0 |
| 420 | call | 5 | 5 | 0 |
| 420 | put | 27 | 27 | 0 |
| 430 | call | 9 | 9 | 0 |
| 430 | put | 99 | 99 | 0 |
| 440 | put | 22 | 22 | 0 |
| 450 | call | 2 | 2 | 0 |
| 450 | put | 25 | 25 | 0 |
| 460 | call | 1 | 1 | 0 |
| 460 | put | 38 | 38 | 0 |
| 470 | call | 19 | 19 | 0 |
| 470 | put | 3 | 3 | 0 |
| 480 | call | 13 | 13 | 0 |
| 480 | put | 25 | 25 | 0 |
| 490 | call | 3 | 3 | 0 |
| 490 | put | 8 | 8 | 0 |
| 500 | call | 50 | 50 | 0 |
| 500 | put | 6 | 6 | 0 |
| 510 | call | 38 | 38 | 0 |
| 520 | call | 90 | 90 | 0 |
| 520 | put | 11 | 11 | 0 |
| 530 | call | 58 | 58 | 0 |
| 540 | call | 16 | 16 | 0 |
| 550 | call | 24 | 24 | 0 |
| 560 | call | 151 | 151 | 0 |
| 570 | call | 349 | 349 | 0 |
| 580 | call | 1 | 1 | 0 |
| 590 | call | 1 | 1 | 0 |
| 600 | call | 2 | 2 | 0 |
| 610 | call | 9 | 9 | 0 |
| 640 | call | 3 | 3 | 0 |
| 660 | call | 2 | 2 | 0 |
| 680 | call | 3 | 3 | 0 |
| 700 | call | 2 | 2 | 0 |
| 720 | call | 1 | 1 | 0 |
| 740 | call | 1 | 1 | 0 |

## Expiration 2027-05-21

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 270 | put | 1 | 1 | 0 |
| 330 | put | 13 | 13 | 0 |
| 340 | put | 16 | 16 | 0 |
| 350 | call | 1 | 1 | 0 |
| 350 | put | 15 | 15 | 0 |
| 360 | put | 5 | 5 | 0 |
| 370 | put | 1 | 1 | 0 |
| 380 | put | 2 | 2 | 0 |
| 390 | put | 8 | 8 | 0 |
| 400 | call | 1 | 1 | 0 |
| 400 | put | 363 | 363 | 0 |
| 410 | call | 1 | 1 | 0 |
| 410 | put | 4 | 4 | 0 |
| 420 | call | 4 | 4 | 0 |
| 430 | call | 6 | 6 | 0 |
| 430 | put | 2 | 12 | +10 |
| 440 | call | 21 | 20 | -1 |
| 440 | put | 1 | 1 | 0 |
| 450 | call | 12 | 12 | 0 |
| 450 | put | 2 | 2 | 0 |
| 460 | call | 10 | 10 | 0 |
| 460 | put | 1 | 1 | 0 |
| 470 | put | 2 | 2 | 0 |
| 480 | put | 1 | 1 | 0 |
| 500 | put | 1 | 1 | 0 |
| 510 | call | 2 | 2 | 0 |
| 530 | call | 1 | 1 | 0 |
| 550 | call | 3 | 3 | 0 |
| 570 | call | 7 | 7 | 0 |
| 590 | call | 14 | 14 | 0 |
| 600 | call | 1 | 1 | 0 |
| 610 | call | 1 | 1 | 0 |
| 620 | call | 1 | 1 | 0 |
| 640 | call | 2 | 2 | 0 |
| 660 | call | 5 | 5 | 0 |

Source page: https://squawkflow.com/oi-changes/MCO