Southwest Gas (SWX) Options Chain
NYSE: SWXUtilitiesOil & Gas ProductionUSD
At close: Oct 8, 3:59 PM ET · Delayed 15 min
After hours: 83.51 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $83.51
- Put/call ratio (OI)
- 0.49
- Put/call ratio (volume)
- 0.13
- Expected move
- ±$6.23
- Open interest (C / P)
- 91 / 45
SWX options summary
The SWX options chain for the October 16, 2026 expiration lists 8 call and 4 put contracts, with 8 days until expiration. Open interest stands at 91 calls and 45 puts, a put/call ratio of 0.49, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $85.00 strike is 50.4%, which implies the market expects a move of about ±$6.23 (7.5%) in Southwest Gas stock by expiration.
The most open interest sits at the $85.00 call (40 contracts) and the $85.00 put (23 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
SWX options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 15.66 | 16.00 | 20.50 | 75.00 | 0.00 | 4.90 | 1.20 | |||||
| 3.50 | 2.95 | 12.50 | 80.00 | — | — | — | |||||
| 0.35 | 0.15 | 0.60 | 85.00 | 1.75 | 4.90 | 1.70 | |||||
| 1.90 | 0.00 | 4.90 | 90.00 | — | — | — | |||||
| 2.29 | 0.00 | 0.00 | 95.00 | 6.50 | 10.80 | 6.40 | |||||
| 1.30 | 0.00 | 4.60 | 100.00 | 10.50 | 15.00 | 9.50 | |||||
| 1.67 | 0.00 | 4.90 | 105.00 | — | — | — | |||||
| 0.35 | 0.00 | 4.50 | 130.00 | — | — | — | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the SWX put/call ratio?
For the October 16, 2026 expiration, the SWX put/call ratio based on open interest is 0.49 (45 puts vs 91 calls), and 0.13 based on today's volume. A ratio above 1 means more puts than calls.
What is SWX's implied volatility?
At-the-money implied volatility for SWX options expiring October 16, 2026 is about 50.4%, an annualized estimate of how much the market expects Southwest Gas stock to move.
How many SWX option expiration dates are there?
SWX has 4 listed expiration dates, from Oct 16, 2026 to Apr 16, 2027.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.