SWX · Southwest Gas Holdings, Inc.

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$93.44 +1.43 (+1.55%)

Market Cap

$6.77B

72.37M

Options Chain

15-min delayed Underlying $93.44 · today Options Calculator

Positioning

Aug 21, 2026 · 24 days to expiry · 36 contracts

Put / call OI

0.87

Balanced positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$90.00

$3.44 below spot

ATM implied vol

20.5%

market's expected move

Open interest by strike

Calls Puts

100

105

110

115

120

125

130

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 24d Sep 18 52d Oct 16 80d Jan 15 171d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	144.5%	0.985	—		—	—	—	—	0
Call · $45 In the money Last — Breakeven — Implied vol 144.5% Delta 0.985 ≈98% ITM Gamma 0.001 Theta -0.025 Vega 0.008 Open interest 0 Model this call Put · $45 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	125.5%	0.983	—		—	—	—	—	0
Call · $50 In the money Last — Breakeven — Implied vol 125.5% Delta 0.983 ≈98% ITM Gamma 0.001 Theta -0.024 Vega 0.009 Open interest 0 Model this call Put · $50 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	108.3%	0.98	—		—	—	—	—	0
Call · $55 In the money Last — Breakeven — Implied vol 108.3% Delta 0.98 ≈98% ITM Gamma 0.002 Theta -0.024 Vega 0.009 Open interest 0 Model this call Put · $55 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	106.2%	0.96	—		—	—	—	—	0
Call · $60 In the money Last — Breakeven — Implied vol 106.2% Delta 0.96 ≈96% ITM Gamma 0.003 Theta -0.043 Vega 0.019 Open interest 0 Model this call Put · $60 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	89.9%	0.953	—		—	—	—	—	0
Call · $65 In the money Last — Breakeven — Implied vol 89.9% Delta 0.953 ≈95% ITM Gamma 0.005 Theta -0.042 Vega 0.02 Open interest 0 Model this call Put · $65 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	74.9%	0.945	—		—	—	—	—	0
Call · $70 In the money Last — Breakeven — Implied vol 74.9% Delta 0.945 ≈95% ITM Gamma 0.006 Theta -0.04 Vega 0.021 Open interest 0 Model this call Put · $70 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	59.6%	0.934	—		—	-0.064	59.2%	—	0
Call · $75 In the money Last — Breakeven — Implied vol 59.6% Delta 0.934 ≈93% ITM Gamma 0.009 Theta -0.037 Vega 0.038 Open interest 0 Model this call Put · $75 Last — Breakeven — Implied vol 59.2% Delta -0.064 ≈6% ITM Gamma 0.009 Theta -0.037 Vega 0.038 Open interest 0 Model this put
0	—	42.3%	0.929	—		—	-0.081	44.6%	—	0
Call · $80 In the money Last — Breakeven — Implied vol 42.3% Delta 0.929 ≈93% ITM Gamma 0.013 Theta -0.028 Vega 0.039 Open interest 0 Model this call Put · $80 Last — Breakeven — Implied vol 44.6% Delta -0.081 ≈8% ITM Gamma 0.014 Theta -0.033 Vega 0.039 Open interest 0 Model this put
0	—	27.3%	0.911	—		$0.55	-0.144	35.7%	2	13
Call · $85 In the money Last — Breakeven — Implied vol 27.3% Delta 0.911 ≈91% ITM Gamma 0.024 Theta -0.021 Vega 0.04 Open interest 0 Model this call Put · $85 Last $0.55 Breakeven $84.45 Implied vol 35.7% Delta -0.144 ≈14% ITM Gamma 0.027 Theta -0.04 Vega 0.061 Open interest 13 Model this put
7	2	30.3%	0.689	$3.15		—	-0.275	24.6%	—	0
Call · $90 In the money Last $3.15 Breakeven $93.15 Implied vol 30.3% Delta 0.689 ≈69% ITM Gamma 0.049 Theta -0.053 Vega 0.082 Open interest 7 Model this call Put · $90 Last — Breakeven — Implied vol 24.6% Delta -0.275 ≈28% ITM Gamma 0.057 Theta -0.041 Vega 0.082 Open interest 0 Model this put
Underlying $93.44
7	5	17.8%	0.353	$1.42		—	-0.608	23.1%	—	0
Call · $95 Last $1.42 Breakeven $96.42 Implied vol 17.8% Delta 0.353 ≈35% ITM Gamma 0.088 Theta -0.034 Vega 0.084 Open interest 7 Model this call Put · $95 In the money Last — Breakeven — Implied vol 23.1% Delta -0.608 ≈61% ITM Gamma 0.07 Theta -0.044 Vega 0.096 Open interest 0 Model this put
1	1	25.2%	0.147	$0.60		—	-0.828	27.4%	—	0
Call · $100 Last $0.60 Breakeven $100.60 Implied vol 25.2% Delta 0.147 ≈15% ITM Gamma 0.038 Theta -0.029 Vega 0.066 Open interest 1 Model this call Put · $100 In the money Last — Breakeven — Implied vol 27.4% Delta -0.828 ≈83% ITM Gamma 0.039 Theta -0.034 Vega 0.066 Open interest 0 Model this put
0	—	—	—	—		—	-0.882	37.2%	—	0
Call · $105 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $105 In the money Last — Breakeven — Implied vol 37.2% Delta -0.882 ≈88% ITM Gamma 0.022 Theta -0.035 Vega 0.045 Open interest 0 Model this put
0	—	—	—	—		—	-0.902	47.3%	—	0
Call · $110 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $110 In the money Last — Breakeven — Implied vol 47.3% Delta -0.902 ≈90% ITM Gamma 0.015 Theta -0.039 Vega 0.046 Open interest 0 Model this put
0	—	—	—	—		—	-0.909	58.1%	—	0
Call · $115 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $115 In the money Last — Breakeven — Implied vol 58.1% Delta -0.909 ≈91% ITM Gamma 0.012 Theta -0.045 Vega 0.046 Open interest 0 Model this put
0	—	—	—	—		—	-0.989	44.2%	—	0
Call · $120 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $120 In the money Last — Breakeven — Implied vol 44.2% Delta -0.989 ≈99% ITM Gamma 0.004 Theta -0.005 Vega 0.005 Open interest 0 Model this put
0	—	—	—	—		—	-0.99	50.4%	—	0
Call · $125 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $125 In the money Last — Breakeven — Implied vol 50.4% Delta -0.99 ≈99% ITM Gamma 0.003 Theta -0.006 Vega 0.005 Open interest 0 Model this put
0	—	—	—	—		—	-0.99	56.4%	—	0
Call · $130 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $130 In the money Last — Breakeven — Implied vol 56.4% Delta -0.99 ≈99% ITM Gamma 0.003 Theta -0.006 Vega 0.005 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1692115 CUSIP 844895102 13F (30d) 98 filings 87 filers Visit website Investor relations