# Biggest options open interest changes

OI settled 2026-10-21 vs 2026-10-20.

Computed from the Oct 21 settlement.

> Open interest change, not trades; it does not say which side opened or closed.

Source: SquawkFlow's own nightly archive of settled open interest. Updates once per session. Figures are contracts, not dollars: the archive holds no option prices.

212 of 214 archived US symbols compared. The other 2 lacked a consecutive settlement pair in the archive for these two sessions. 9 of those compared reported an identical book in both sessions.

Across the compared symbols: 104,061 contracts changed open interest, +7,841,006 added, -1,837,442 removed, net +6,003,564 contracts.

## Largest open interest increases (contracts)

| Ticker | Call/Put | Change | Strike | Expiry | DTE at settle | Prior OI | Current OI | Settled |
|---|---|---|---|---|---|---|---|---|
| EWZ | Call | +53,042 | 48 | 2026-11-20 | 30 | 171,222 | 224,264 | 2026-10-21 |
| EWZ | Call | +41,600 | 48 | 2026-11-06 | 16 | 295 | 41,895 | 2026-10-21 |
| IWM | Put | +40,411 | 263 | 2026-11-20 | 30 | 44,064 | 84,475 | 2026-10-21 |
| EWZ | Call | +40,170 | 51 | 2026-11-20 | 30 | 24,198 | 64,368 | 2026-10-21 |
| EWZ | Call | +40,007 | 43 | 2027-03-19 | 149 | 24,233 | 64,240 | 2026-10-21 |
| SPY | Put | +36,716 | 767 | 2026-10-27 | 6 | 525 | 37,241 | 2026-10-21 |
| EWZ | Call | +36,347 | 48 | 2026-11-13 | 23 | 129 | 36,476 | 2026-10-21 |
| EWZ | Call | +30,891 | 46 | 2026-10-30 | 9 | 39,861 | 70,752 | 2026-10-21 |
| EWZ | Call | +29,789 | 44 | 2026-11-20 | 30 | 171,853 | 201,642 | 2026-10-21 |
| XLF | Put | +29,587 | 47 | 2027-01-15 | 86 | 27,867 | 57,454 | 2026-10-21 |
| CMG | Put | +28,766 | 24 | 2026-11-06 | 16 | 9 | 28,775 | 2026-10-21 |
| SPY | Call | +27,321 | 800 | 2026-11-20 | 30 | 53,958 | 81,279 | 2026-10-21 |
| DVN | Call | +26,875 | 55 | 2026-12-18 | 58 | 6,723 | 33,598 | 2026-10-21 |
| IWM | Put | +26,845 | 270 | 2026-11-20 | 30 | 141,536 | 168,381 | 2026-10-21 |
| XLF | Put | +24,777 | 51 | 2027-01-15 | 86 | 76,309 | 101,086 | 2026-10-21 |
| XLF | Put | +24,766 | 53 | 2026-11-20 | 30 | 115,355 | 140,121 | 2026-10-21 |
| UBER | Call | +23,835 | 115 | 2028-01-21 | 457 | 1,120 | 24,955 | 2026-10-21 |
| QQQ | Call | +23,626 | 731 | 2026-10-22 | 1 | 728 | 24,354 | 2026-10-21 |
| SPX | Call | +23,136 | 7,900 | 2026-10-27 | 6 | 983 | 24,119 | 2026-10-21 |
| QQQ | Put | +22,709 | 696 | 2026-10-30 | 9 | 1,638 | 24,347 | 2026-10-21 |

DTE at settle counts calendar days from the settlement date, not from today.

## Largest open interest decreases (contracts)

| Ticker | Call/Put | Change | Strike | Expiry | DTE at settle | Prior OI | Current OI | Settled |
|---|---|---|---|---|---|---|---|---|
| SPY | Put | -55,144 | 760 | 2026-10-30 | 9 | 130,435 | 75,291 | 2026-10-21 |
| SPY | Put | -47,946 | 745 | 2026-10-30 | 9 | 129,222 | 81,276 | 2026-10-21 |
| EWZ | Call | -29,891 | 50 | 2026-11-06 | 16 | 42,522 | 12,631 | 2026-10-21 |
| EWZ | Call | -26,080 | 50 | 2026-11-13 | 23 | 36,342 | 10,262 | 2026-10-21 |
| EWZ | Call | -22,926 | 45 | 2026-11-20 | 30 | 701,400 | 678,474 | 2026-10-21 |
| SPCX | Put | -22,133 | 125 | 2026-11-20 | 30 | 39,503 | 17,370 | 2026-10-21 |
| IWM | Put | -18,685 | 272 | 2026-10-30 | 9 | 40,469 | 21,784 | 2026-10-21 |
| NFLX | Put | -14,948 | 90 | 2027-01-15 | 86 | 17,919 | 2,971 | 2026-10-21 |
| GOOGL | Call | -14,464 | 415 | 2026-11-20 | 30 | 28,162 | 13,698 | 2026-10-21 |
| ORCL | Call | -14,029 | 145 | 2026-10-30 | 9 | 34,360 | 20,331 | 2026-10-21 |
| GOOGL | Call | -13,907 | 367.5 | 2026-11-20 | 30 | 27,093 | 13,186 | 2026-10-21 |
| SPY | Put | -12,922 | 732 | 2026-11-20 | 30 | 24,590 | 11,668 | 2026-10-21 |
| NU | Call | -12,069 | 14 | 2026-11-20 | 30 | 117,331 | 105,262 | 2026-10-21 |
| IWM | Put | -11,808 | 269 | 2026-10-30 | 9 | 28,028 | 16,220 | 2026-10-21 |
| MSFT | Call | -10,938 | 600 | 2026-10-30 | 9 | 18,612 | 7,674 | 2026-10-21 |
| EWZ | Call | -10,701 | 41 | 2026-11-20 | 30 | 135,911 | 125,210 | 2026-10-21 |
| IWM | Put | -10,535 | 262 | 2026-11-20 | 30 | 67,361 | 56,826 | 2026-10-21 |
| MSFT | Call | -10,420 | 575 | 2026-10-30 | 9 | 15,862 | 5,442 | 2026-10-21 |
| QQQ | Put | -10,305 | 690 | 2026-10-30 | 9 | 66,947 | 56,642 | 2026-10-21 |
| QQQ | Put | -10,269 | 640 | 2026-10-30 | 9 | 24,768 | 14,499 | 2026-10-21 |

DTE at settle counts calendar days from the settlement date, not from today.

## Index ETFs (SPY, QQQ, IWM, DIA)

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| IWM | 2026-11-20 | 263 | put | 44,064 | 84,475 | +40,411 |
| SPY | 2026-10-27 | 767 | put | 525 | 37,241 | +36,716 |
| SPY | 2026-11-20 | 800 | call | 53,958 | 81,279 | +27,321 |
| IWM | 2026-11-20 | 270 | put | 141,536 | 168,381 | +26,845 |
| QQQ | 2026-10-22 | 731 | call | 728 | 24,354 | +23,626 |
| QQQ | 2026-10-30 | 696 | put | 1,638 | 24,347 | +22,709 |
| SPY | 2026-12-18 | 810 | call | 79,997 | 100,675 | +20,678 |
| SPY | 2026-11-20 | 400 | put | 77,947 | 97,843 | +19,896 |
| IWM | 2026-10-23 | 283 | call | 4,709 | 21,529 | +16,820 |
| SPY | 2026-11-20 | 736 | put | 26,656 | 42,953 | +16,297 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPY | 2026-10-30 | 760 | put | 130,435 | 75,291 | -55,144 |
| SPY | 2026-10-30 | 745 | put | 129,222 | 81,276 | -47,946 |
| IWM | 2026-10-30 | 272 | put | 40,469 | 21,784 | -18,685 |
| SPY | 2026-11-20 | 732 | put | 24,590 | 11,668 | -12,922 |
| IWM | 2026-10-30 | 269 | put | 28,028 | 16,220 | -11,808 |
| IWM | 2026-11-20 | 262 | put | 67,361 | 56,826 | -10,535 |
| QQQ | 2026-10-30 | 690 | put | 66,947 | 56,642 | -10,305 |
| QQQ | 2026-10-30 | 640 | put | 24,768 | 14,499 | -10,269 |
| IWM | 2026-10-30 | 258 | put | 29,744 | 20,726 | -9,018 |
| IWM | 2026-10-22 | 282 | call | 13,173 | 4,652 | -8,521 |

## Single stocks

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| CMG | 2026-11-06 | 24 | put | 9 | 28,775 | +28,766 |
| DVN | 2026-12-18 | 55 | call | 6,723 | 33,598 | +26,875 |
| UBER | 2028-01-21 | 115 | call | 1,120 | 24,955 | +23,835 |
| GOOGL | 2026-10-30 | 352.5 | call | 495 | 22,684 | +22,189 |
| UBER | 2026-11-13 | 58 | put | 220 | 22,015 | +21,795 |
| GOOGL | 2026-10-30 | 387.5 | call | 4 | 20,105 | +20,101 |
| CMG | 2026-12-18 | 25 | put | 51,852 | 70,352 | +18,500 |
| SPCX | 2026-10-23 | 155 | put | 4,913 | 22,501 | +17,588 |
| AMZN | 2026-10-30 | 292.5 | call | 93 | 17,589 | +17,496 |
| AAPL | 2026-12-18 | 315 | put | 5,828 | 23,243 | +17,415 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPCX | 2026-11-20 | 125 | put | 39,503 | 17,370 | -22,133 |
| NFLX | 2027-01-15 | 90 | put | 17,919 | 2,971 | -14,948 |
| GOOGL | 2026-11-20 | 415 | call | 28,162 | 13,698 | -14,464 |
| ORCL | 2026-10-30 | 145 | call | 34,360 | 20,331 | -14,029 |
| GOOGL | 2026-11-20 | 367.5 | call | 27,093 | 13,186 | -13,907 |
| NU | 2026-11-20 | 14 | call | 117,331 | 105,262 | -12,069 |
| MSFT | 2026-10-30 | 600 | call | 18,612 | 7,674 | -10,938 |
| MSFT | 2026-10-30 | 575 | call | 15,862 | 5,442 | -10,420 |
| AAPL | 2026-11-20 | 300 | put | 29,427 | 20,193 | -9,234 |
| CMG | 2026-12-18 | 40 | put | 6,722 | 83 | -6,639 |

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +4,027,733 | -905,026 | +3,122,707 |
| Puts | +3,813,273 | -932,416 | +2,880,857 |

## Biggest percent changes

Percent changes only for contracts with at least 1,000 prior open interest.

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| UBER | 2028-01-21 | 115 | call | 1,120 | 24,955 | +23,835 | +2,128.1% |
| QQQ | 2026-10-30 | 696 | put | 1,638 | 24,347 | +22,709 | +1,386.4% |
| SPY | 2026-10-22 | 776 | call | 1,600 | 17,145 | +15,545 | +971.6% |
| SPX | 2026-10-22 | 7,450 | put | 1,054 | 11,108 | +10,054 | +953.9% |
| NKE | 2026-10-23 | 37 | put | 1,158 | 9,717 | +8,559 | +739.1% |
| QQQ | 2026-10-22 | 670 | put | 1,497 | 11,999 | +10,502 | +701.5% |
| SPY | 2026-12-31 | 735 | put | 1,428 | 11,092 | +9,664 | +676.8% |
| ORCL | 2027-12-17 | 140 | call | 1,038 | 8,038 | +7,000 | +674.4% |
| SPY | 2026-12-31 | 695 | put | 1,593 | 11,643 | +10,050 | +630.9% |
| INTC | 2026-10-30 | 96 | call | 1,183 | 7,921 | +6,738 | +569.6% |
| SPY | 2026-11-13 | 795 | call | 1,961 | 12,172 | +10,211 | +520.7% |
| QQQ | 2026-10-22 | 725 | call | 1,146 | 6,725 | +5,579 | +486.8% |
| SPY | 2026-10-22 | 764 | put | 1,062 | 6,143 | +5,081 | +478.4% |
| RTX | 2026-11-20 | 175 | put | 1,078 | 6,223 | +5,145 | +477.3% |
| SPX | 2026-11-20 | 3,200 | put | 1,360 | 7,637 | +6,277 | +461.5% |
| SPX | 2027-04-16 | 7,350 | put | 1,524 | 8,245 | +6,721 | +441% |
| SPY | 2026-10-22 | 771 | call | 1,363 | 6,969 | +5,606 | +411.3% |
| INTC | 2026-10-30 | 99 | call | 1,551 | 7,881 | +6,330 | +408.1% |
| NFLX | 2026-10-23 | 67 | call | 1,727 | 8,638 | +6,911 | +400.2% |
| DVN | 2026-12-18 | 55 | call | 6,723 | 33,598 | +26,875 | +399.7% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| CMG | 2026-12-18 | 40 | put | 6,722 | 83 | -6,639 | -98.8% |
| UNH | 2026-11-06 | 325 | put | 1,646 | 39 | -1,607 | -97.6% |
| NFLX | 2028-01-21 | 112 | put | 1,267 | 46 | -1,221 | -96.4% |
| NFLX | 2027-01-15 | 98 | put | 6,375 | 259 | -6,116 | -95.9% |
| NFLX | 2027-01-15 | 92 | put | 4,239 | 185 | -4,054 | -95.6% |
| NFLX | 2026-11-20 | 90 | put | 3,276 | 159 | -3,117 | -95.1% |
| NFLX | 2027-03-19 | 100 | put | 3,331 | 193 | -3,138 | -94.2% |
| NBIS | 2026-10-23 | 225 | put | 2,108 | 166 | -1,942 | -92.1% |
| NFLX | 2028-01-21 | 110 | put | 1,167 | 98 | -1,069 | -91.6% |
| NFLX | 2027-01-15 | 94 | put | 1,608 | 140 | -1,468 | -91.3% |
| NFLX | 2027-01-15 | 93 | put | 1,048 | 104 | -944 | -90.1% |
| NBIS | 2026-10-23 | 220 | put | 1,147 | 155 | -992 | -86.5% |
| NFLX | 2027-01-15 | 90 | put | 17,919 | 2,971 | -14,948 | -83.4% |
| SOFI | 2026-10-23 | 17 | put | 1,952 | 364 | -1,588 | -81.4% |
| NFLX | 2026-12-18 | 89 | put | 2,171 | 432 | -1,739 | -80.1% |
| NFLX | 2027-01-15 | 95 | put | 6,470 | 1,348 | -5,122 | -79.2% |
| MRNA | 2026-12-18 | 140 | call | 1,217 | 334 | -883 | -72.6% |
| EWZ | 2026-11-13 | 50 | call | 36,342 | 10,262 | -26,080 | -71.8% |
| EWZ | 2026-11-06 | 50 | call | 42,522 | 12,631 | -29,891 | -70.3% |
| SPX | 2026-10-27 | 7,850 | call | 11,791 | 3,542 | -8,249 | -70% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| EWZ | 48 | call | +162,602 | 8 |
| EWZ | 46 | call | +51,646 | 9 |
| SPY | 745 | put | -45,119 | 25 |
| EWZ | 44 | call | +44,136 | 7 |
| SPY | 760 | put | -43,496 | 29 |
| SPY | 767 | put | +42,545 | 16 |
| EWZ | 51 | call | +42,157 | 3 |
| IWM | 263 | put | +40,041 | 15 |
| EWZ | 43 | call | +38,602 | 10 |
| IWM | 270 | put | +37,834 | 27 |
| SPX | 7,900 | call | +34,885 | 42 |
| SPY | 800 | call | +32,190 | 27 |
| EWZ | 47 | call | +31,228 | 9 |
| EWZ | 50 | call | -30,455 | 9 |
| SPCX | 155 | put | +29,592 | 23 |
| XLF | 47 | put | +29,587 | 5 |
| CMG | 24 | put | +28,855 | 5 |
| EWZ | 30 | put | +27,501 | 9 |
| SPX | 8,000 | call | +27,486 | 47 |
| DVN | 55 | call | +27,067 | 10 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| SPX | +758,591 | +288,368 | +470,223 |
| EWZ | +522,021 | +393,213 | +128,808 |
| SPY | +502,315 | +258,626 | +243,689 |
| QQQ | +451,267 | +173,829 | +277,438 |
| SPCX | +268,368 | +144,463 | +123,905 |
| NVDA | +206,863 | +98,674 | +108,189 |
| IWM | +197,844 | +63,549 | +134,295 |
| TSLA | +186,216 | +83,030 | +103,186 |
| META | +160,624 | +87,286 | +73,338 |
| AAPL | +114,410 | +63,149 | +51,261 |

Largest net decreases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| MQ | -142 | -147 | +5 |
| VRTX | -32 | +278 | -310 |

## Archive

- https://squawkflow.com/oi-changes/2026-10-29.md (2026-10-29 vs 2026-10-28, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-28.md (2026-10-28 vs 2026-10-27, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-27.md (2026-10-27 vs 2026-10-26, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-26.md (2026-10-26 vs 2026-10-23, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-23.md (2026-10-23 vs 2026-10-22, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-22.md (2026-10-22 vs 2026-10-21, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-21.md (2026-10-21 vs 2026-10-20, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-20.md (2026-10-20 vs 2026-10-19, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-19.md (2026-10-19 vs 2026-10-16, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-16.md (2026-10-16 vs 2026-10-15, 212 symbols)

SPX open interest change by strike: https://squawkflow.com/oi-change.md

Canonical: https://squawkflow.com/oi-changes/2026-10-21