# Biggest options open interest changes

OI settled 2026-09-30 vs 2026-09-29.

> 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.

148 of 212 archived US symbols compared. The other 64 lacked a consecutive settlement pair in the archive for these two sessions. 3 of those compared reported an identical book in both sessions.

Across the compared symbols: 69,935 contracts changed open interest, +5,663,864 added, -1,052,075 removed, net +4,611,789 contracts.

## Largest open interest increases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| TLT | 2026-11-30 | 83 | call | 3,495 | 96,741 | +93,246 |
| SPY | 2026-12-31 | 650 | put | 4,578 | 79,607 | +75,029 |
| SPY | 2026-12-31 | 550 | put | 2,070 | 76,357 | +74,287 |
| XLU | 2026-10-30 | 41 | call | 2,949 | 56,101 | +53,152 |
| SPY | 2026-10-06 | 810 | call | 250 | 44,417 | +44,167 |
| SPY | 2026-10-06 | 809 | call | 1 | 41,675 | +41,674 |
| TLT | 2026-12-18 | 73 | put | 19,340 | 57,402 | +38,062 |
| XLI | 2027-01-15 | 160 | put | 28,705 | 56,668 | +27,963 |
| IWM | 2026-10-30 | 272 | put | 1,586 | 28,726 | +27,140 |
| XLU | 2026-11-20 | 42 | call | 5,560 | 29,267 | +23,707 |
| SPY | 2026-10-16 | 733 | put | 6,919 | 29,974 | +23,055 |
| SPY | 2026-12-31 | 802 | call | 71 | 20,728 | +20,657 |
| SPY | 2026-12-31 | 610 | put | 9,627 | 30,238 | +20,611 |
| SPY | 2026-12-31 | 723 | put | 97 | 20,696 | +20,599 |
| TLT | 2026-10-02 | 78 | call | 10,217 | 30,655 | +20,438 |
| QQQ | 2026-10-30 | 715 | put | 2,500 | 21,867 | +19,367 |
| IWM | 2026-10-09 | 285 | call | 6,259 | 24,600 | +18,341 |
| SPY | 2026-12-18 | 770 | call | 16,354 | 33,810 | +17,456 |
| IWM | 2026-10-16 | 266 | put | 38,990 | 56,295 | +17,305 |
| SPY | 2026-10-30 | 800 | call | 19,911 | 36,843 | +16,932 |

## Largest open interest decreases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| XLI | 2026-11-20 | 168 | put | 28,428 | 5,617 | -22,811 |
| SPY | 2026-12-18 | 830 | call | 57,449 | 35,385 | -22,064 |
| QQQ | 2026-10-02 | 690 | put | 40,351 | 22,846 | -17,505 |
| IWM | 2026-10-16 | 294 | call | 20,660 | 7,315 | -13,345 |
| IWM | 2026-10-16 | 268 | put | 29,973 | 17,851 | -12,122 |
| SPY | 2026-10-09 | 790 | call | 19,851 | 9,299 | -10,552 |
| IWM | 2026-10-16 | 265 | put | 61,248 | 51,414 | -9,834 |
| SPX | 2026-10-02 | 7,900 | call | 32,566 | 23,288 | -9,278 |
| XLF | 2026-10-16 | 54 | put | 73,235 | 64,886 | -8,349 |
| TLT | 2026-10-16 | 83 | call | 206,070 | 197,963 | -8,107 |
| BAC | 2026-10-02 | 58 | call | 15,529 | 7,552 | -7,977 |
| SPY | 2026-10-07 | 740 | put | 18,098 | 10,258 | -7,840 |
| BAC | 2026-10-02 | 57 | call | 12,434 | 4,823 | -7,611 |
| IWM | 2026-12-18 | 175 | put | 63,498 | 55,923 | -7,575 |
| TLT | 2028-01-21 | 88 | call | 88,916 | 81,789 | -7,127 |
| XLU | 2026-12-18 | 44 | call | 18,344 | 11,394 | -6,950 |
| IWM | 2026-11-20 | 250 | put | 42,371 | 35,498 | -6,873 |
| TLT | 2026-10-16 | 81 | call | 67,284 | 60,630 | -6,654 |
| TLT | 2026-12-18 | 80 | put | 43,552 | 37,444 | -6,108 |
| XLV | 2027-01-15 | 150 | put | 26,549 | 20,533 | -6,016 |

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

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPY | 2026-12-31 | 650 | put | 4,578 | 79,607 | +75,029 |
| SPY | 2026-12-31 | 550 | put | 2,070 | 76,357 | +74,287 |
| SPY | 2026-10-06 | 810 | call | 250 | 44,417 | +44,167 |
| SPY | 2026-10-06 | 809 | call | 1 | 41,675 | +41,674 |
| IWM | 2026-10-30 | 272 | put | 1,586 | 28,726 | +27,140 |
| SPY | 2026-10-16 | 733 | put | 6,919 | 29,974 | +23,055 |
| SPY | 2026-12-31 | 802 | call | 71 | 20,728 | +20,657 |
| SPY | 2026-12-31 | 610 | put | 9,627 | 30,238 | +20,611 |
| SPY | 2026-12-31 | 723 | put | 97 | 20,696 | +20,599 |
| QQQ | 2026-10-30 | 715 | put | 2,500 | 21,867 | +19,367 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPY | 2026-12-18 | 830 | call | 57,449 | 35,385 | -22,064 |
| QQQ | 2026-10-02 | 690 | put | 40,351 | 22,846 | -17,505 |
| IWM | 2026-10-16 | 294 | call | 20,660 | 7,315 | -13,345 |
| IWM | 2026-10-16 | 268 | put | 29,973 | 17,851 | -12,122 |
| SPY | 2026-10-09 | 790 | call | 19,851 | 9,299 | -10,552 |
| IWM | 2026-10-16 | 265 | put | 61,248 | 51,414 | -9,834 |
| SPY | 2026-10-07 | 740 | put | 18,098 | 10,258 | -7,840 |
| IWM | 2026-12-18 | 175 | put | 63,498 | 55,923 | -7,575 |
| IWM | 2026-11-20 | 250 | put | 42,371 | 35,498 | -6,873 |
| SPY | 2026-10-16 | 730 | put | 64,544 | 58,583 | -5,961 |

## Single stocks

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| TSLA | 2026-10-05 | 377.5 | call | 379 | 15,758 | +15,379 |
| MSFT | 2026-10-30 | 555 | call | 439 | 15,304 | +14,865 |
| BB | 2026-11-20 | 10 | call | 3,325 | 17,179 | +13,854 |
| BAC | 2026-10-30 | 50 | put | 297 | 10,007 | +9,710 |
| INTC | 2028-06-16 | 80 | call | 0 | 9,121 | +9,121 |
| INTC | 2028-06-16 | 130 | call | 5 | 9,123 | +9,118 |
| BAC | 2026-10-09 | 56 | call | 1,040 | 9,383 | +8,343 |
| INTC | 2026-11-20 | 230 | call | 98 | 8,286 | +8,188 |
| BAC | 2026-10-09 | 57 | call | 2,638 | 10,682 | +8,044 |
| INTC | 2026-11-20 | 150 | call | 16,911 | 23,932 | +7,021 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| BAC | 2026-10-02 | 58 | call | 15,529 | 7,552 | -7,977 |
| BAC | 2026-10-02 | 57 | call | 12,434 | 4,823 | -7,611 |
| ITW | 2026-10-16 | 300 | put | 5,004 | 0 | -5,004 |
| ITW | 2026-10-16 | 300 | call | 5,062 | 62 | -5,000 |
| BA | 2026-10-16 | 200 | put | 9,262 | 5,088 | -4,174 |
| AAPL | 2026-10-02 | 335 | call | 9,663 | 5,747 | -3,916 |
| SOFI | 2028-01-21 | 15 | put | 32,119 | 28,987 | -3,132 |
| AAPL | 2026-10-02 | 330 | call | 5,892 | 3,203 | -2,689 |
| META | 2026-10-09 | 565 | put | 3,656 | 968 | -2,688 |
| AAPL | 2026-10-02 | 332.5 | call | 4,971 | 2,319 | -2,652 |

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +2,857,074 | -486,972 | +2,370,102 |
| Puts | +2,806,790 | -565,103 | +2,241,687 |

## 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 % |
|---|---|---|---|---|---|---|---|
| SPY | 2026-12-31 | 550 | put | 2,070 | 76,357 | +74,287 | +3,588.7% |
| TLT | 2026-11-30 | 83 | call | 3,495 | 96,741 | +93,246 | +2,668% |
| XLU | 2026-10-30 | 41 | call | 2,949 | 56,101 | +53,152 | +1,802.4% |
| IWM | 2026-10-30 | 272 | put | 1,586 | 28,726 | +27,140 | +1,711.2% |
| SPY | 2026-12-31 | 650 | put | 4,578 | 79,607 | +75,029 | +1,638.9% |
| SPY | 2026-10-01 | 733 | put | 1,332 | 13,270 | +11,938 | +896.2% |
| XLV | 2027-01-15 | 160 | put | 1,353 | 13,405 | +12,052 | +890.8% |
| BAC | 2026-10-09 | 56 | call | 1,040 | 9,383 | +8,343 | +802.2% |
| QQQ | 2026-10-30 | 715 | put | 2,500 | 21,867 | +19,367 | +774.7% |
| SPY | 2026-10-01 | 735 | put | 1,422 | 11,072 | +9,650 | +678.6% |
| IWM | 2026-12-18 | 268 | put | 1,514 | 11,093 | +9,579 | +632.7% |
| SPY | 2026-10-02 | 731 | put | 1,685 | 12,043 | +10,358 | +614.7% |
| SPY | 2026-10-01 | 768 | call | 2,415 | 16,308 | +13,893 | +575.3% |
| SPY | 2026-10-01 | 763 | call | 1,031 | 6,823 | +5,792 | +561.8% |
| QQQ | 2026-10-01 | 733 | put | 1,033 | 6,219 | +5,186 | +502% |
| QQQ | 2026-10-01 | 748 | call | 1,417 | 8,284 | +6,867 | +484.6% |
| SPY | 2026-10-01 | 762 | put | 1,373 | 7,841 | +6,468 | +471.1% |
| QQQ | 2026-10-05 | 760 | call | 1,422 | 8,018 | +6,596 | +463.9% |
| QQQ | 2026-10-02 | 736 | put | 1,607 | 9,031 | +7,424 | +462% |
| TGT | 2026-10-02 | 167.5 | call | 1,018 | 5,683 | +4,665 | +458.3% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| ITW | 2026-10-16 | 300 | put | 5,004 | 0 | -5,004 | -100% |
| TLT | 2026-10-05 | 74 | call | 1,105 | 0 | -1,105 | -100% |
| KO | 2026-10-02 | 90 | put | 1,385 | 6 | -1,379 | -99.6% |
| XLF | 2027-03-19 | 61 | put | 3,822 | 35 | -3,787 | -99.1% |
| ITW | 2026-10-16 | 300 | call | 5,062 | 62 | -5,000 | -98.8% |
| USB | 2027-01-15 | 37.5 | call | 1,222 | 23 | -1,199 | -98.1% |
| IWM | 2026-10-02 | 290 | put | 1,344 | 36 | -1,308 | -97.3% |
| WFC | 2026-10-02 | 85 | put | 1,680 | 54 | -1,626 | -96.8% |
| XLP | 2026-10-16 | 85 | put | 3,331 | 256 | -3,075 | -92.3% |
| BAC | 2026-10-02 | 58 | put | 1,948 | 151 | -1,797 | -92.2% |
| XLF | 2027-09-17 | 61 | call | 1,116 | 163 | -953 | -85.4% |
| XLI | 2026-11-20 | 168 | put | 28,428 | 5,617 | -22,811 | -80.2% |
| SOFI | 2026-12-18 | 28 | put | 2,564 | 582 | -1,982 | -77.3% |
| META | 2026-10-09 | 565 | put | 3,656 | 968 | -2,688 | -73.5% |
| KO | 2026-10-02 | 89 | put | 1,095 | 292 | -803 | -73.3% |
| SHOP | 2026-10-02 | 135 | put | 2,806 | 874 | -1,932 | -68.9% |
| XLF | 2026-10-02 | 55.5 | put | 1,578 | 530 | -1,048 | -66.4% |
| IWM | 2026-10-16 | 294 | call | 20,660 | 7,315 | -13,345 | -64.6% |
| COF | 2026-10-02 | 200 | call | 2,573 | 938 | -1,635 | -63.5% |
| IWM | 2026-10-02 | 287 | put | 3,024 | 1,129 | -1,895 | -62.7% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| TLT | 83 | call | +89,987 | 25 |
| SPY | 650 | put | +84,120 | 22 |
| SPY | 550 | put | +75,035 | 18 |
| SPY | 810 | call | +61,557 | 23 |
| XLU | 41 | call | +54,653 | 12 |
| TLT | 78 | call | +53,861 | 28 |
| SPY | 809 | call | +45,744 | 10 |
| TLT | 80 | call | +45,633 | 28 |
| TLT | 73 | put | +38,349 | 20 |
| SPY | 733 | put | +36,696 | 18 |
| QQQ | 730 | put | +31,450 | 26 |
| SPY | 770 | call | +31,063 | 29 |
| QQQ | 715 | put | +30,014 | 24 |
| XLI | 160 | put | +27,661 | 7 |
| IWM | 272 | put | +26,188 | 15 |
| SPY | 735 | put | +24,611 | 25 |
| IWM | 266 | put | +24,117 | 16 |
| QQQ | 740 | put | +23,953 | 28 |
| INTC | 130 | call | +23,761 | 23 |
| IWM | 285 | call | +23,598 | 25 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| SPY | +1,033,015 | +407,837 | +625,178 |
| SPX | +720,573 | +295,874 | +424,699 |
| QQQ | +514,136 | +176,171 | +337,965 |
| TLT | +338,257 | +261,927 | +76,330 |
| IWM | +214,533 | +116,490 | +98,043 |
| TSLA | +164,332 | +98,338 | +65,994 |
| INTC | +156,832 | +105,235 | +51,597 |
| XLU | +132,590 | +116,415 | +16,175 |
| XLF | +93,658 | +38,369 | +55,289 |
| HOOD | +81,204 | +50,795 | +30,409 |

Largest net decreases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| ITW | -9,711 | -4,823 | -4,888 |
| SBUX | -58 | +74 | -132 |

## Archive

- 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)
- https://squawkflow.com/oi-changes/2026-10-01.md (2026-10-01 vs 2026-09-30, 156 symbols)
- https://squawkflow.com/oi-changes/2026-09-30.md (2026-09-30 vs 2026-09-29, 148 symbols)
- https://squawkflow.com/oi-changes/2026-09-29.md (2026-09-29 vs 2026-09-28, 150 symbols)
- https://squawkflow.com/oi-changes/2026-09-28.md (2026-09-28 vs 2026-09-25, 150 symbols)
- https://squawkflow.com/oi-changes/2026-09-25.md (2026-09-25 vs 2026-09-24, 135 symbols)

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

Canonical: https://squawkflow.com/oi-changes/2026-09-30