Southwest Airlines Co. options tape
Read from CBOE's delayed chain on 23 September 2026, with Southwest Airlines Co. at $42.35: open interest within 90 days was 36,887 call and 21,076 put contracts, a put/call ratio of 0.57; the day's volume was 31,628 calls and 2,174 puts (0.07). The most call open interest sits at the $42.50 strike (10,021 contracts) and the most put open interest at $40.00 (4,671). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 3.2% of spot. For 16 October 2026, implied volatility was 44.1% at the put 5% below spot and 41.6% at the call 5% above, +2.5 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $42.50 | 10,021 |
| Puts | $40.00 | 4,671 |
The strike with the most open interest on each side, across expiries within 90 days.
Strikes where the day's volume was at least twice the open interest
| Contract | Volume | Open interest before | Premium traded |
|---|---|---|---|
| 25 September 2026 call at $44.00 | 27,140 | 161 | $407,100 |
Volume of at least 200 contracts and at least twice the open interest, with at least $25,000 of premium at the mid; contracts expiring the same day are left out. Premium is mid price times volume times 100.
Open interest built since 22 September 2026
| Contract | Open interest now | Change |
|---|---|---|
| 16 October 2026 call at $45.00 | 2,985 | +1,869 |
| 16 October 2026 put at $42.50 | 1,369 | +844 |
| 23 October 2026 call at $43.00 | 709 | +665 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for LUV, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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