# Biggest options open interest changes

OI settled 2026-08-26 vs 2026-08-25.

> 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.

1 of 212 archived US symbols compared. The other 211 lacked a consecutive settlement pair in the archive for these two sessions.

Across the compared symbols: 7,086 contracts changed open interest, +284,167 added, -189,890 removed, net +94,277 contracts.

## Largest open interest increases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPX | 2026-10-09 | 6,400 | put | 0 | 10,091 | +10,091 |
| SPX | 2026-09-04 | 7,515 | put | 131 | 8,663 | +8,532 |
| SPX | 2026-10-09 | 6,300 | put | 0 | 8,402 | +8,402 |
| SPX | 2026-10-30 | 9,000 | call | 24,057 | 28,857 | +4,800 |
| SPX | 2026-10-30 | 8,560 | call | 41 | 4,814 | +4,773 |
| SPX | 2026-09-18 | 7,700 | call | 37,351 | 41,956 | +4,605 |
| SPX | 2026-12-18 | 8,000 | put | 128,548 | 133,015 | +4,467 |
| SPX | 2026-12-18 | 7,000 | call | 176,226 | 180,008 | +3,782 |
| SPX | 2026-12-18 | 8,000 | call | 148,256 | 151,805 | +3,549 |
| SPX | 2026-09-02 | 7,225 | put | 71 | 3,018 | +2,947 |
| SPX | 2026-12-18 | 7,000 | put | 184,402 | 187,081 | +2,679 |
| SPX | 2026-09-11 | 7,220 | put | 101 | 2,017 | +1,916 |
| SPX | 2027-03-19 | 8,000 | call | 36,972 | 38,680 | +1,708 |
| SPX | 2026-10-09 | 6,350 | put | 0 | 1,707 | +1,707 |
| SPX | 2026-09-18 | 7,850 | call | 14,717 | 16,404 | +1,687 |
| SPX | 2027-02-19 | 5,675 | put | 52 | 1,690 | +1,638 |
| SPX | 2026-09-09 | 7,810 | call | 61 | 1,653 | +1,592 |
| SPX | 2026-12-18 | 8,040 | call | 23 | 1,615 | +1,592 |
| SPX | 2026-09-02 | 7,475 | put | 558 | 2,116 | +1,558 |
| SPX | 2026-09-02 | 7,815 | call | 313 | 1,859 | +1,546 |

## Largest open interest decreases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPX | 2026-08-27 | 6,600 | put | 5,618 | 0 | -5,618 |
| SPX | 2026-08-27 | 7,725 | call | 3,508 | 0 | -3,508 |
| SPX | 2026-08-27 | 7,570 | put | 3,315 | 0 | -3,315 |
| SPX | 2026-08-27 | 8,000 | call | 3,242 | 0 | -3,242 |
| SPX | 2026-08-27 | 7,275 | put | 3,047 | 0 | -3,047 |
| SPX | 2026-08-27 | 7,715 | put | 3,043 | 0 | -3,043 |
| SPX | 2026-08-27 | 8,100 | call | 2,575 | 0 | -2,575 |
| SPX | 2026-08-27 | 6,950 | put | 2,428 | 0 | -2,428 |
| SPX | 2026-08-27 | 7,735 | call | 2,399 | 0 | -2,399 |
| SPX | 2026-08-27 | 7,000 | put | 2,335 | 0 | -2,335 |
| SPX | 2026-08-27 | 7,450 | put | 2,315 | 0 | -2,315 |
| SPX | 2026-08-27 | 7,575 | put | 2,281 | 0 | -2,281 |
| SPX | 2026-08-27 | 7,700 | put | 2,261 | 0 | -2,261 |
| SPX | 2026-08-27 | 7,800 | call | 2,218 | 0 | -2,218 |
| SPX | 2026-08-27 | 7,725 | put | 2,156 | 0 | -2,156 |
| SPX | 2026-08-27 | 7,750 | call | 2,116 | 0 | -2,116 |
| SPX | 2026-08-27 | 7,735 | put | 2,075 | 0 | -2,075 |
| SPX | 2026-08-31 | 7,300 | put | 33,364 | 31,300 | -2,064 |
| SPX | 2026-08-27 | 7,160 | put | 2,004 | 0 | -2,004 |
| SPX | 2026-08-27 | 7,700 | call | 1,747 | 0 | -1,747 |

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

Increases:

None in this pair.

Decreases:

None in this pair.

## Single stocks

Increases:

None in this pair.

Decreases:

None in this pair.

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +108,836 | -69,013 | +39,823 |
| Puts | +175,331 | -120,877 | +54,454 |

## 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 % |
|---|---|---|---|---|---|---|---|
| SPX | 2026-09-01 | 7,875 | call | 1,713 | 3,052 | +1,339 | +78.2% |
| SPX | 2026-08-28 | 7,825 | call | 1,774 | 3,105 | +1,331 | +75% |
| SPX | 2026-12-18 | 6,025 | put | 1,901 | 3,201 | +1,300 | +68.4% |
| SPX | 2026-08-28 | 7,490 | put | 1,270 | 2,085 | +815 | +64.2% |
| SPX | 2027-09-17 | 8,000 | call | 1,330 | 2,012 | +682 | +51.3% |
| SPX | 2026-09-04 | 7,725 | put | 1,239 | 1,841 | +602 | +48.6% |
| SPX | 2026-10-16 | 7,730 | call | 1,317 | 1,956 | +639 | +48.5% |
| SPX | 2026-09-04 | 7,200 | put | 3,180 | 4,641 | +1,461 | +45.9% |
| SPX | 2026-08-28 | 7,780 | call | 1,642 | 2,373 | +731 | +44.5% |
| SPX | 2026-09-18 | 7,270 | put | 1,286 | 1,841 | +555 | +43.2% |
| SPX | 2027-08-20 | 7,650 | call | 1,088 | 1,551 | +463 | +42.6% |
| SPX | 2027-09-17 | 8,000 | put | 1,143 | 1,606 | +463 | +40.5% |
| SPX | 2026-09-16 | 7,650 | put | 1,190 | 1,645 | +455 | +38.2% |
| SPX | 2026-08-28 | 7,640 | put | 1,681 | 2,192 | +511 | +30.4% |
| SPX | 2026-08-28 | 7,540 | put | 1,674 | 2,173 | +499 | +29.8% |
| SPX | 2026-11-20 | 3,400 | put | 2,844 | 3,675 | +831 | +29.2% |
| SPX | 2026-08-28 | 7,090 | put | 3,069 | 3,954 | +885 | +28.8% |
| SPX | 2026-08-28 | 7,575 | put | 1,112 | 1,424 | +312 | +28.1% |
| SPX | 2027-01-15 | 8,200 | call | 3,603 | 4,608 | +1,005 | +27.9% |
| SPX | 2026-08-28 | 7,580 | put | 3,073 | 3,910 | +837 | +27.2% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| SPX | 2026-08-27 | 6,600 | put | 5,618 | 0 | -5,618 | -100% |
| SPX | 2026-08-27 | 7,725 | call | 3,508 | 0 | -3,508 | -100% |
| SPX | 2026-08-27 | 7,570 | put | 3,315 | 0 | -3,315 | -100% |
| SPX | 2026-08-27 | 8,000 | call | 3,242 | 0 | -3,242 | -100% |
| SPX | 2026-08-27 | 7,275 | put | 3,047 | 0 | -3,047 | -100% |
| SPX | 2026-08-27 | 7,715 | put | 3,043 | 0 | -3,043 | -100% |
| SPX | 2026-08-27 | 8,100 | call | 2,575 | 0 | -2,575 | -100% |
| SPX | 2026-08-27 | 6,950 | put | 2,428 | 0 | -2,428 | -100% |
| SPX | 2026-08-27 | 7,735 | call | 2,399 | 0 | -2,399 | -100% |
| SPX | 2026-08-27 | 7,000 | put | 2,335 | 0 | -2,335 | -100% |
| SPX | 2026-08-27 | 7,450 | put | 2,315 | 0 | -2,315 | -100% |
| SPX | 2026-08-27 | 7,575 | put | 2,281 | 0 | -2,281 | -100% |
| SPX | 2026-08-27 | 7,700 | put | 2,261 | 0 | -2,261 | -100% |
| SPX | 2026-08-27 | 7,800 | call | 2,218 | 0 | -2,218 | -100% |
| SPX | 2026-08-27 | 7,725 | put | 2,156 | 0 | -2,156 | -100% |
| SPX | 2026-08-27 | 7,750 | call | 2,116 | 0 | -2,116 | -100% |
| SPX | 2026-08-27 | 7,735 | put | 2,075 | 0 | -2,075 | -100% |
| SPX | 2026-08-27 | 7,160 | put | 2,004 | 0 | -2,004 | -100% |
| SPX | 2026-08-27 | 7,700 | call | 1,747 | 0 | -1,747 | -100% |
| SPX | 2026-08-27 | 7,600 | put | 1,747 | 0 | -1,747 | -100% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| SPX | 6,400 | put | +11,010 | 26 |
| SPX | 7,515 | put | +8,477 | 14 |
| SPX | 6,300 | put | +7,726 | 30 |
| SPX | 9,000 | call | +5,722 | 13 |
| SPX | 7,700 | call | +5,694 | 41 |
| SPX | 6,600 | put | -5,331 | 36 |
| SPX | 8,000 | put | +5,098 | 18 |
| SPX | 8,560 | call | +4,773 | 1 |
| SPX | 7,000 | put | +3,677 | 49 |
| SPX | 6,000 | put | +3,644 | 37 |
| SPX | 7,000 | call | +3,561 | 20 |
| SPX | 7,725 | call | -3,073 | 31 |
| SPX | 7,715 | put | -3,054 | 13 |
| SPX | 7,570 | put | -3,041 | 19 |
| SPX | 7,200 | put | +2,981 | 41 |
| SPX | 7,225 | put | +2,938 | 29 |
| SPX | 7,275 | put | -2,835 | 31 |
| SPX | 8,000 | call | +2,781 | 48 |
| SPX | 6,100 | put | +2,621 | 23 |
| SPX | 7,600 | put | +2,508 | 44 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| SPX | +94,277 | +39,823 | +54,454 |

Largest net decreases:

None in this pair.

## 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/2026-08-26