# Biggest options open interest changes

OI settled 2026-10-13 vs 2026-10-12.

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

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

210 of 214 archived US symbols compared. The other 4 lacked a consecutive settlement pair in the archive for these two sessions. 34 of those compared reported an identical book in both sessions.

Across the compared symbols: 98,377 contracts changed open interest, +7,362,567 added, -1,524,609 removed, net +5,837,958 contracts.

## Largest open interest increases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| WMT | 2026-11-20 | 120 | call | 14,108 | 118,906 | +104,798 |
| SPX | 2026-11-27 | 6,500 | put | 44 | 60,817 | +60,773 |
| SPX | 2026-11-27 | 6,400 | put | 29 | 58,927 | +58,898 |
| SPY | 2026-10-14 | 736 | put | 2,464 | 51,580 | +49,116 |
| CMG | 2026-11-06 | 25 | put | 12 | 35,562 | +35,550 |
| IWM | 2026-11-20 | 263 | put | 25,075 | 59,789 | +34,714 |
| INTC | 2026-11-20 | 130 | call | 60,703 | 95,244 | +34,541 |
| XLF | 2026-10-23 | 53 | put | 2,023 | 34,357 | +32,334 |
| IWM | 2026-10-30 | 265 | put | 9,793 | 41,555 | +31,762 |
| FXI | 2027-01-15 | 28 | put | 10,375 | 41,278 | +30,903 |
| SPY | 2026-10-30 | 834 | call | 10,319 | 39,909 | +29,590 |
| U | 2026-10-30 | 47 | call | 414 | 29,869 | +29,455 |
| IWM | 2026-10-30 | 225 | put | 259 | 27,985 | +27,726 |
| TLT | 2026-10-16 | 80.5 | call | 5,666 | 33,194 | +27,528 |
| SPY | 2026-10-30 | 833 | call | 420 | 27,341 | +26,921 |
| SPY | 2026-10-14 | 738 | put | 517 | 27,082 | +26,565 |
| IWM | 2026-10-30 | 278 | call | 1,168 | 27,211 | +26,043 |
| TLT | 2026-10-16 | 79.5 | call | 6,979 | 33,003 | +26,024 |
| XLE | 2026-11-20 | 70 | call | 40,803 | 65,332 | +24,529 |
| DIS | 2026-10-23 | 106 | put | 66 | 23,229 | +23,163 |

## Largest open interest decreases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| WMT | 2026-11-20 | 115 | call | 122,019 | 57,355 | -64,664 |
| U | 2026-10-16 | 46 | call | 66,289 | 36,623 | -29,666 |
| ARM | 2026-11-20 | 320 | call | 22,904 | 2,623 | -20,281 |
| EEM | 2026-10-16 | 66 | put | 43,798 | 23,775 | -20,023 |
| NU | 2026-10-16 | 17 | call | 34,073 | 17,348 | -16,725 |
| NU | 2026-10-16 | 16 | call | 41,230 | 25,488 | -15,742 |
| IWM | 2026-10-16 | 280 | put | 80,310 | 64,636 | -15,674 |
| EEM | 2026-10-16 | 66 | call | 21,374 | 6,101 | -15,273 |
| XLF | 2026-12-18 | 60 | call | 37,685 | 22,557 | -15,128 |
| XLF | 2026-12-18 | 56 | call | 28,110 | 13,182 | -14,928 |
| XLE | 2026-10-16 | 67 | call | 22,894 | 8,064 | -14,830 |
| TLT | 2026-11-20 | 75 | put | 89,406 | 79,336 | -10,070 |
| IWM | 2026-10-16 | 285 | call | 58,890 | 49,741 | -9,149 |
| IWM | 2026-10-30 | 284 | call | 26,180 | 17,575 | -8,605 |
| IWM | 2026-10-16 | 271 | put | 63,601 | 55,280 | -8,321 |
| SPX | 2026-10-16 | 7,000 | put | 219,852 | 211,593 | -8,259 |
| SPX | 2026-10-16 | 8,000 | call | 206,920 | 199,089 | -7,831 |
| SPX | 2026-10-16 | 8,000 | put | 191,154 | 183,888 | -7,266 |
| SPX | 2026-10-16 | 7,000 | call | 193,825 | 186,565 | -7,260 |
| MU | 2026-12-18 | 1,200 | call | 16,585 | 10,173 | -6,412 |

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

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPY | 2026-10-14 | 736 | put | 2,464 | 51,580 | +49,116 |
| IWM | 2026-11-20 | 263 | put | 25,075 | 59,789 | +34,714 |
| IWM | 2026-10-30 | 265 | put | 9,793 | 41,555 | +31,762 |
| SPY | 2026-10-30 | 834 | call | 10,319 | 39,909 | +29,590 |
| IWM | 2026-10-30 | 225 | put | 259 | 27,985 | +27,726 |
| SPY | 2026-10-30 | 833 | call | 420 | 27,341 | +26,921 |
| SPY | 2026-10-14 | 738 | put | 517 | 27,082 | +26,565 |
| IWM | 2026-10-30 | 278 | call | 1,168 | 27,211 | +26,043 |
| SPY | 2026-10-16 | 773 | put | 5,755 | 26,545 | +20,790 |
| SPY | 2026-12-18 | 245 | put | 1,204 | 20,651 | +19,447 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| IWM | 2026-10-16 | 280 | put | 80,310 | 64,636 | -15,674 |
| IWM | 2026-10-16 | 285 | call | 58,890 | 49,741 | -9,149 |
| IWM | 2026-10-30 | 284 | call | 26,180 | 17,575 | -8,605 |
| IWM | 2026-10-16 | 271 | put | 63,601 | 55,280 | -8,321 |
| SPY | 2026-11-20 | 730 | put | 57,564 | 51,211 | -6,353 |
| IWM | 2026-11-20 | 265 | put | 115,371 | 109,284 | -6,087 |
| IWM | 2026-10-16 | 275 | put | 91,153 | 85,204 | -5,949 |
| IWM | 2026-10-16 | 280 | call | 36,473 | 30,619 | -5,854 |
| IWM | 2026-10-16 | 288 | put | 13,578 | 8,546 | -5,032 |
| IWM | 2026-12-18 | 240 | put | 66,385 | 61,388 | -4,997 |

## Single stocks

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| WMT | 2026-11-20 | 120 | call | 14,108 | 118,906 | +104,798 |
| CMG | 2026-11-06 | 25 | put | 12 | 35,562 | +35,550 |
| INTC | 2026-11-20 | 130 | call | 60,703 | 95,244 | +34,541 |
| U | 2026-10-30 | 47 | call | 414 | 29,869 | +29,455 |
| DIS | 2026-10-23 | 106 | put | 66 | 23,229 | +23,163 |
| NVDA | 2026-12-18 | 210 | put | 29,253 | 52,347 | +23,094 |
| ARM | 2026-12-18 | 330 | call | 1,071 | 22,191 | +21,120 |
| NVDA | 2026-12-18 | 170 | put | 18,433 | 39,457 | +21,024 |
| BAC | 2026-10-16 | 50 | put | 8,534 | 26,109 | +17,575 |
| MSFT | 2026-10-30 | 575 | call | 487 | 15,520 | +15,033 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| WMT | 2026-11-20 | 115 | call | 122,019 | 57,355 | -64,664 |
| U | 2026-10-16 | 46 | call | 66,289 | 36,623 | -29,666 |
| ARM | 2026-11-20 | 320 | call | 22,904 | 2,623 | -20,281 |
| NU | 2026-10-16 | 17 | call | 34,073 | 17,348 | -16,725 |
| NU | 2026-10-16 | 16 | call | 41,230 | 25,488 | -15,742 |
| MU | 2026-12-18 | 1,200 | call | 16,585 | 10,173 | -6,412 |
| SNAP | 2026-10-16 | 6 | call | 49,001 | 42,767 | -6,234 |
| GOOGL | 2026-10-16 | 400 | call | 24,407 | 18,227 | -6,180 |
| AMC | 2027-01-15 | 3.5 | put | 11,359 | 5,222 | -6,137 |
| GOOGL | 2026-12-18 | 450 | call | 17,112 | 11,266 | -5,846 |

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +3,663,469 | -910,789 | +2,752,680 |
| Puts | +3,699,098 | -613,820 | +3,085,278 |

## 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 % |
|---|---|---|---|---|---|---|---|
| IWM | 2026-10-30 | 278 | call | 1,168 | 27,211 | +26,043 | +2,229.7% |
| SPY | 2026-10-14 | 736 | put | 2,464 | 51,580 | +49,116 | +1,993.3% |
| ARM | 2026-12-18 | 330 | call | 1,071 | 22,191 | +21,120 | +1,972% |
| SPY | 2026-12-18 | 245 | put | 1,204 | 20,651 | +19,447 | +1,615.2% |
| XLF | 2026-10-23 | 53 | put | 2,023 | 34,357 | +32,334 | +1,598.3% |
| SPY | 2026-10-30 | 625 | put | 1,185 | 11,858 | +10,673 | +900.7% |
| IWM | 2026-10-16 | 263 | put | 1,354 | 13,372 | +12,018 | +887.6% |
| IWM | 2026-11-20 | 296 | call | 1,021 | 10,022 | +9,001 | +881.6% |
| WMT | 2026-11-20 | 120 | call | 14,108 | 118,906 | +104,798 | +742.8% |
| TLT | 2027-05-21 | 80 | call | 1,715 | 13,987 | +12,272 | +715.6% |
| SPX | 2026-11-13 | 7,025 | put | 1,038 | 8,123 | +7,085 | +682.6% |
| IWM | 2026-11-20 | 298 | call | 1,515 | 10,530 | +9,015 | +595% |
| INTC | 2026-10-23 | 97 | put | 1,098 | 7,190 | +6,092 | +554.8% |
| QQQ | 2026-10-14 | 500 | put | 1,572 | 10,166 | +8,594 | +546.7% |
| QQQ | 2026-10-14 | 751 | call | 1,024 | 6,502 | +5,478 | +535% |
| SPY | 2026-10-23 | 825 | call | 1,313 | 8,170 | +6,857 | +522.2% |
| MU | 2026-10-14 | 1,000 | call | 1,263 | 7,625 | +6,362 | +503.7% |
| NVDA | 2026-10-14 | 190 | put | 2,040 | 12,045 | +10,005 | +490.4% |
| TLT | 2026-10-16 | 80.5 | call | 5,666 | 33,194 | +27,528 | +485.8% |
| QQQ | 2026-10-16 | 707 | put | 2,447 | 14,030 | +11,583 | +473.4% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| IWM | 2026-10-16 | 289 | put | 1,620 | 98 | -1,522 | -94% |
| MU | 2026-11-06 | 835 | put | 2,382 | 156 | -2,226 | -93.5% |
| ARM | 2026-11-20 | 320 | call | 22,904 | 2,623 | -20,281 | -88.5% |
| SBUX | 2026-10-16 | 100 | put | 3,097 | 407 | -2,690 | -86.9% |
| C | 2026-10-16 | 140 | put | 3,611 | 600 | -3,011 | -83.4% |
| WFC | 2026-10-16 | 90 | put | 2,923 | 676 | -2,247 | -76.9% |
| QQQ | 2026-11-20 | 756 | call | 1,923 | 456 | -1,467 | -76.3% |
| MRNA | 2026-10-16 | 120 | call | 1,164 | 313 | -851 | -73.1% |
| OPEN | 2027-01-15 | 10 | put | 3,415 | 966 | -2,449 | -71.7% |
| JPM | 2026-10-16 | 355 | put | 1,451 | 412 | -1,039 | -71.6% |
| EEM | 2026-10-16 | 66 | call | 21,374 | 6,101 | -15,273 | -71.5% |
| GRAB | 2027-01-15 | 5.5 | put | 2,307 | 774 | -1,533 | -66.4% |
| GOOGL | 2026-12-18 | 500 | call | 8,689 | 3,024 | -5,665 | -65.2% |
| XLE | 2026-10-16 | 67 | call | 22,894 | 8,064 | -14,830 | -64.8% |
| TLT | 2026-10-30 | 68 | call | 1,101 | 401 | -700 | -63.6% |
| META | 2026-10-30 | 665 | put | 1,372 | 506 | -866 | -63.1% |
| SPX | 2026-10-20 | 7,710 | put | 1,300 | 490 | -810 | -62.3% |
| PLTR | 2026-10-16 | 185 | call | 8,757 | 3,488 | -5,269 | -60.2% |
| AMD | 2027-01-15 | 820 | call | 2,825 | 1,128 | -1,697 | -60.1% |
| SMR | 2026-11-20 | 11 | put | 3,418 | 1,373 | -2,045 | -59.8% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| WMT | 120 | call | +104,436 | 15 |
| SPX | 6,400 | put | +64,063 | 39 |
| WMT | 115 | call | -62,449 | 16 |
| SPX | 6,500 | put | +61,258 | 33 |
| IWM | 263 | put | +54,614 | 11 |
| SPY | 736 | put | +49,218 | 10 |
| INTC | 130 | call | +36,336 | 20 |
| CMG | 25 | put | +35,640 | 10 |
| QQQ | 760 | call | +34,918 | 26 |
| XLF | 53 | put | +33,042 | 14 |
| IWM | 278 | call | +32,877 | 17 |
| NVDA | 210 | put | +32,493 | 21 |
| NVDA | 170 | put | +31,784 | 24 |
| FXI | 28 | put | +30,904 | 2 |
| U | 47 | call | +29,961 | 8 |
| U | 46 | call | -29,662 | 6 |
| SPY | 834 | call | +29,591 | 2 |
| IWM | 225 | put | +29,086 | 6 |
| TLT | 80.5 | call | +27,858 | 9 |
| XLE | 70 | call | +27,671 | 20 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| SPY | +800,792 | +294,720 | +506,072 |
| SPX | +679,911 | +206,516 | +473,395 |
| QQQ | +633,465 | +246,569 | +386,896 |
| NVDA | +304,768 | +134,317 | +170,451 |
| IWM | +289,869 | +129,365 | +160,504 |
| INTC | +248,414 | +155,247 | +93,167 |
| MU | +188,710 | +127,202 | +61,508 |
| AAPL | +173,476 | +107,829 | +65,647 |
| TLT | +168,169 | +130,369 | +37,800 |
| TSLA | +125,510 | +70,338 | +55,172 |

Largest net decreases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| NU | -11,377 | -22,909 | +11,532 |
| ITW | -209 | -226 | +17 |
| NOC | -202 | +206 | -408 |
| HUBS | -153 | -242 | +89 |
| CROX | -119 | +44 | -163 |
| WU | -116 | +192 | -308 |

## Archive

- https://squawkflow.com/oi-changes/2026-10-15.md (2026-10-15 vs 2026-10-14, 212 symbols)
- https://squawkflow.com/oi-changes/2026-10-14.md (2026-10-14 vs 2026-10-13, 210 symbols)
- https://squawkflow.com/oi-changes/2026-10-13.md (2026-10-13 vs 2026-10-12, 210 symbols)
- https://squawkflow.com/oi-changes/2026-10-12.md (2026-10-12 vs 2026-10-09, 210 symbols)
- https://squawkflow.com/oi-changes/2026-10-09.md (2026-10-09 vs 2026-10-08, 168 symbols)
- https://squawkflow.com/oi-changes/2026-10-08.md (2026-10-08 vs 2026-10-07, 158 symbols)
- https://squawkflow.com/oi-changes/2026-10-07.md (2026-10-07 vs 2026-10-06, 135 symbols)
- https://squawkflow.com/oi-changes/2026-10-06.md (2026-10-06 vs 2026-10-05, 136 symbols)
- https://squawkflow.com/oi-changes/2026-10-05.md (2026-10-05 vs 2026-10-02, 155 symbols)
- https://squawkflow.com/oi-changes/2026-10-02.md (2026-10-02 vs 2026-10-01, 148 symbols)

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

Canonical: https://squawkflow.com/oi-changes/2026-10-13