# Biggest options open interest changes

OI settled 2026-10-20 vs 2026-10-19.

Computed from the Oct 20 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. 7 of those compared reported an identical book in both sessions.

Across the compared symbols: 102,533 contracts changed open interest, +8,766,141 added, -1,213,401 removed, net +7,552,740 contracts.

## Largest open interest increases (contracts)

| Ticker | Call/Put | Change | Strike | Expiry | DTE at settle | Prior OI | Current OI | Settled |
|---|---|---|---|---|---|---|---|---|
| EWZ | Call | +92,482 | 48 | 2026-11-20 | 31 | 78,740 | 171,222 | 2026-10-20 |
| EWZ | Call | +84,134 | 45 | 2027-01-15 | 87 | 85,284 | 169,418 | 2026-10-20 |
| EWZ | Call | +83,558 | 51 | 2026-12-18 | 59 | 71,406 | 154,964 | 2026-10-20 |
| EWZ | Call | +76,207 | 50 | 2027-01-15 | 87 | 187,450 | 263,657 | 2026-10-20 |
| EWZ | Put | +62,118 | 36 | 2026-10-30 | 10 | 167,393 | 229,511 | 2026-10-20 |
| EWZ | Call | +61,927 | 54 | 2026-12-18 | 59 | 653 | 62,580 | 2026-10-20 |
| SPX | Put | +59,437 | 6,350 | 2026-12-04 | 45 | 57 | 59,494 | 2026-10-20 |
| SPX | Put | +57,776 | 6,250 | 2026-12-04 | 45 | 28 | 57,804 | 2026-10-20 |
| EWZ | Call | +57,210 | 44 | 2026-11-20 | 31 | 114,643 | 171,853 | 2026-10-20 |
| EWZ | Put | +56,886 | 34 | 2026-10-30 | 10 | 260,688 | 317,574 | 2026-10-20 |
| EWZ | Call | +49,974 | 53 | 2026-12-18 | 59 | 25,883 | 75,857 | 2026-10-20 |
| TLT | Call | +49,704 | 84 | 2026-12-18 | 59 | 100,475 | 150,179 | 2026-10-20 |
| TLT | Call | +48,916 | 83 | 2026-12-18 | 59 | 73,986 | 122,902 | 2026-10-20 |
| EWZ | Call | +46,634 | 50 | 2026-11-20 | 31 | 143,027 | 189,661 | 2026-10-20 |
| TLT | Call | +40,708 | 83 | 2026-11-20 | 31 | 41,499 | 82,207 | 2026-10-20 |
| TLT | Call | +39,481 | 84 | 2026-11-20 | 31 | 51,975 | 91,456 | 2026-10-20 |
| EWZ | Call | +36,416 | 45 | 2026-10-30 | 10 | 13,934 | 50,350 | 2026-10-20 |
| EWZ | Call | +35,957 | 47 | 2026-10-30 | 10 | 10,280 | 46,237 | 2026-10-20 |
| EWZ | Call | +34,891 | 55 | 2027-03-19 | 150 | 9,156 | 44,047 | 2026-10-20 |
| EWZ | Call | +34,456 | 60 | 2027-03-19 | 150 | 561 | 35,017 | 2026-10-20 |

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 |
|---|---|---|---|---|---|---|---|---|
| EWZ | Call | -33,591 | 49 | 2026-12-18 | 59 | 96,892 | 63,301 | 2026-10-20 |
| EWZ | Call | -27,602 | 43 | 2026-11-20 | 31 | 833,509 | 805,907 | 2026-10-20 |
| EWZ | Call | -21,765 | 41 | 2026-11-20 | 31 | 157,676 | 135,911 | 2026-10-20 |
| EWZ | Call | -17,420 | 39 | 2026-11-20 | 31 | 231,565 | 214,145 | 2026-10-20 |
| EWZ | Call | -16,925 | 42 | 2026-11-20 | 31 | 236,761 | 219,836 | 2026-10-20 |
| PFE | Put | -15,400 | 25 | 2026-11-20 | 31 | 59,053 | 43,653 | 2026-10-20 |
| SPY | Put | -14,999 | 580 | 2026-11-20 | 31 | 19,451 | 4,452 | 2026-10-20 |
| SPY | Put | -14,931 | 680 | 2026-11-20 | 31 | 52,444 | 37,513 | 2026-10-20 |
| EWZ | Put | -13,008 | 37 | 2026-11-20 | 31 | 178,950 | 165,942 | 2026-10-20 |
| EWZ | Call | -12,393 | 46.5 | 2026-10-30 | 10 | 21,082 | 8,689 | 2026-10-20 |
| MSFT | Call | -9,612 | 675 | 2026-12-18 | 59 | 37,655 | 28,043 | 2026-10-20 |
| XLE | Put | -8,688 | 66 | 2026-10-21 | 1 | 14,062 | 5,374 | 2026-10-20 |
| AMZN | Call | -8,619 | 280 | 2026-10-30 | 10 | 47,059 | 38,440 | 2026-10-20 |
| PFE | Put | -8,498 | 29.5 | 2026-10-23 | 3 | 14,967 | 6,469 | 2026-10-20 |
| IWM | Put | -8,478 | 258 | 2026-11-20 | 31 | 62,383 | 53,905 | 2026-10-20 |
| EWZ | Call | -8,435 | 44 | 2026-12-18 | 59 | 109,323 | 100,888 | 2026-10-20 |
| AMZN | Call | -8,152 | 265 | 2026-10-30 | 10 | 22,880 | 14,728 | 2026-10-20 |
| EWZ | Put | -6,730 | 38 | 2026-12-18 | 59 | 46,989 | 40,259 | 2026-10-20 |
| SPY | Put | -5,992 | 761 | 2026-10-23 | 3 | 12,624 | 6,632 | 2026-10-20 |
| MMM | Call | -5,955 | 175 | 2026-11-20 | 31 | 11,358 | 5,403 | 2026-10-20 |

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 |
|---|---|---|---|---|---|---|
| QQQ | 2026-12-18 | 620 | put | 34,040 | 61,012 | +26,972 |
| IWM | 2026-11-20 | 261 | put | 25,921 | 52,091 | +26,170 |
| QQQ | 2026-12-18 | 670 | put | 19,467 | 45,043 | +25,576 |
| IWM | 2026-11-20 | 262 | put | 45,262 | 67,361 | +22,099 |
| QQQ | 2026-10-22 | 540 | put | 105 | 20,437 | +20,332 |
| SPY | 2026-10-26 | 766 | put | 609 | 20,117 | +19,508 |
| IWM | 2026-10-30 | 269 | put | 10,169 | 28,028 | +17,859 |
| IWM | 2026-10-30 | 258 | put | 12,049 | 29,744 | +17,695 |
| QQQ | 2026-10-22 | 736 | call | 314 | 17,263 | +16,949 |
| SPY | 2026-11-20 | 732 | put | 8,996 | 24,590 | +15,594 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| SPY | 2026-11-20 | 580 | put | 19,451 | 4,452 | -14,999 |
| SPY | 2026-11-20 | 680 | put | 52,444 | 37,513 | -14,931 |
| IWM | 2026-11-20 | 258 | put | 62,383 | 53,905 | -8,478 |
| SPY | 2026-10-23 | 761 | put | 12,624 | 6,632 | -5,992 |
| SPY | 2026-11-20 | 726 | put | 19,501 | 13,640 | -5,861 |
| IWM | 2026-10-21 | 275 | call | 10,614 | 4,803 | -5,811 |
| SPY | 2026-11-20 | 730 | put | 60,031 | 55,273 | -4,758 |
| SPY | 2026-10-30 | 750 | put | 67,636 | 63,376 | -4,260 |
| QQQ | 2026-10-23 | 720 | put | 18,085 | 13,981 | -4,104 |
| IWM | 2026-10-21 | 277 | call | 12,157 | 8,129 | -4,028 |

## Single stocks

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| WU | 2029-01-19 | 7 | call | 30,725 | 60,728 | +30,003 |
| SPCX | 2026-11-20 | 125 | put | 13,104 | 39,503 | +26,399 |
| INTC | 2028-06-16 | 135 | call | 21 | 23,609 | +23,588 |
| INTC | 2028-06-16 | 80 | call | 9,186 | 32,697 | +23,511 |
| NFLX | 2026-11-13 | 58 | put | 20,915 | 42,601 | +21,686 |
| UBER | 2026-11-13 | 59 | put | 89 | 20,325 | +20,236 |
| EL | 2027-04-16 | 135 | call | 4 | 19,115 | +19,111 |
| INTC | 2026-10-30 | 110 | call | 22,084 | 40,731 | +18,647 |
| MS | 2026-10-23 | 195 | call | 1,048 | 16,660 | +15,612 |
| NFLX | 2026-10-23 | 76 | call | 4,796 | 19,454 | +14,658 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| PFE | 2026-11-20 | 25 | put | 59,053 | 43,653 | -15,400 |
| MSFT | 2026-12-18 | 675 | call | 37,655 | 28,043 | -9,612 |
| AMZN | 2026-10-30 | 280 | call | 47,059 | 38,440 | -8,619 |
| PFE | 2026-10-23 | 29.5 | put | 14,967 | 6,469 | -8,498 |
| AMZN | 2026-10-30 | 265 | call | 22,880 | 14,728 | -8,152 |
| MMM | 2026-11-20 | 175 | call | 11,358 | 5,403 | -5,955 |
| AAPL | 2026-10-23 | 360 | put | 5,740 | 41 | -5,699 |
| SPCX | 2026-10-30 | 190 | call | 35,730 | 30,604 | -5,126 |
| UPS | 2026-10-23 | 100 | call | 6,427 | 2,721 | -3,706 |
| AMZN | 2026-11-20 | 265 | call | 22,834 | 19,726 | -3,108 |

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +4,865,186 | -641,985 | +4,223,201 |
| Puts | +3,900,955 | -571,416 | +3,329,539 |

## 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 % |
|---|---|---|---|---|---|---|---|
| MS | 2026-10-23 | 195 | call | 1,048 | 16,660 | +15,612 | +1,489.7% |
| EWZ | 2026-10-30 | 38.5 | put | 1,079 | 12,398 | +11,319 | +1,049% |
| SPY | 2026-10-30 | 610 | put | 1,638 | 16,479 | +14,841 | +906% |
| BMY | 2026-10-30 | 57 | put | 1,185 | 10,424 | +9,239 | +779.7% |
| SPX | 2026-10-27 | 7,850 | call | 1,630 | 11,791 | +10,161 | +623.4% |
| GOOGL | 2026-10-21 | 350 | call | 1,387 | 9,761 | +8,374 | +603.7% |
| SPY | 2026-11-20 | 360 | put | 2,306 | 16,018 | +13,712 | +594.6% |
| XLE | 2026-10-23 | 66 | put | 2,984 | 20,710 | +17,726 | +594% |
| AAPL | 2026-10-21 | 342.5 | call | 1,569 | 9,953 | +8,384 | +534.4% |
| EWZ | 2027-07-16 | 42 | call | 1,503 | 9,465 | +7,962 | +529.7% |
| TLT | 2028-01-21 | 73 | put | 2,408 | 14,501 | +12,093 | +502.2% |
| GE | 2026-11-20 | 350 | call | 1,849 | 10,700 | +8,851 | +478.7% |
| SPCX | 2026-10-21 | 120 | put | 2,620 | 15,154 | +12,534 | +478.4% |
| XLP | 2027-01-15 | 87 | put | 1,080 | 6,106 | +5,026 | +465.4% |
| IWM | 2028-01-21 | 210 | put | 1,291 | 7,291 | +6,000 | +464.8% |
| EWZ | 2026-11-20 | 51 | call | 4,292 | 24,198 | +19,906 | +463.8% |
| SPX | 2026-11-20 | 7,910 | call | 1,028 | 5,676 | +4,648 | +452.1% |
| IWM | 2026-10-23 | 273 | put | 1,804 | 9,868 | +8,064 | +447% |
| SPX | 2026-10-27 | 7,800 | call | 1,309 | 6,844 | +5,535 | +422.8% |
| QQQ | 2026-11-20 | 555 | put | 1,171 | 5,977 | +4,806 | +410.4% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| AAPL | 2026-10-23 | 360 | put | 5,740 | 41 | -5,699 | -99.3% |
| FISV | 2027-01-15 | 70 | put | 1,044 | 44 | -1,000 | -95.8% |
| GLD | 2026-11-20 | 425 | put | 3,896 | 339 | -3,557 | -91.3% |
| EWZ | 2027-06-17 | 44 | call | 5,117 | 609 | -4,508 | -88.1% |
| NFLX | 2028-01-21 | 114 | put | 1,032 | 124 | -908 | -88% |
| SPY | 2026-11-20 | 580 | put | 19,451 | 4,452 | -14,999 | -77.1% |
| CMG | 2027-01-15 | 42.5 | put | 1,376 | 392 | -984 | -71.5% |
| MSFT | 2026-10-30 | 640 | call | 1,818 | 544 | -1,274 | -70.1% |
| GLD | 2027-01-15 | 450 | put | 3,854 | 1,199 | -2,655 | -68.9% |
| UNH | 2026-11-13 | 325 | put | 1,754 | 553 | -1,201 | -68.5% |
| AMZN | 2026-11-27 | 290 | call | 2,139 | 736 | -1,403 | -65.6% |
| GLD | 2026-10-28 | 370 | call | 1,406 | 483 | -923 | -65.6% |
| NET | 2026-11-20 | 370 | call | 2,199 | 824 | -1,375 | -62.5% |
| XLE | 2026-10-21 | 66 | put | 14,062 | 5,374 | -8,688 | -61.8% |
| EWZ | 2026-10-30 | 46.5 | call | 21,082 | 8,689 | -12,393 | -58.8% |
| UPS | 2026-10-23 | 100 | call | 6,427 | 2,721 | -3,706 | -57.7% |
| PFE | 2026-10-23 | 29.5 | put | 14,967 | 6,469 | -8,498 | -56.8% |
| QQQ | 2026-10-30 | 647 | put | 5,708 | 2,474 | -3,234 | -56.7% |
| IWM | 2026-10-21 | 275 | call | 10,614 | 4,803 | -5,811 | -54.7% |
| HAL | 2026-10-23 | 35.5 | call | 1,632 | 753 | -879 | -53.9% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| EWZ | 50 | call | +144,198 | 11 |
| EWZ | 45 | call | +139,148 | 12 |
| EWZ | 48 | call | +127,387 | 10 |
| EWZ | 54 | call | +107,743 | 4 |
| EWZ | 51 | call | +103,503 | 7 |
| TLT | 84 | call | +89,940 | 24 |
| TLT | 83 | call | +89,753 | 26 |
| EWZ | 34 | put | +64,420 | 13 |
| EWZ | 46 | call | +63,281 | 10 |
| EWZ | 36 | put | +62,691 | 10 |
| SPX | 6,350 | put | +59,034 | 15 |
| SPX | 6,250 | put | +58,101 | 14 |
| EWZ | 44 | call | +54,802 | 13 |
| EWZ | 55 | call | +53,868 | 6 |
| EWZ | 47 | call | +53,195 | 11 |
| EWZ | 53 | call | +52,409 | 6 |
| EWZ | 60 | call | +36,672 | 5 |
| SPCX | 125 | put | +32,626 | 22 |
| QQQ | 620 | put | +32,002 | 22 |
| SPY | 600 | put | +31,540 | 23 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| EWZ | +1,155,842 | +924,513 | +231,329 |
| SPX | +726,097 | +240,470 | +485,627 |
| QQQ | +586,814 | +204,467 | +382,347 |
| SPY | +501,122 | +211,765 | +289,357 |
| NFLX | +371,979 | +192,154 | +179,825 |
| IWM | +330,958 | +147,427 | +183,531 |
| SPCX | +323,280 | +145,245 | +178,035 |
| NVDA | +281,610 | +161,814 | +119,796 |
| TLT | +245,667 | +211,210 | +34,457 |
| INTC | +168,051 | +123,308 | +44,743 |

Largest net decreases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| GD | -672 | +140 | -812 |
| MQ | -99 | +31 | -130 |

## 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/2026-10-20