Southwest Gas Holdings, Inc. (SWX) IV/HV History
Comparing implied volatility to historical (realized) volatility reveals whether options are priced rich or cheap relative to actual price movement. Persistent gaps can signal trading opportunities.
Southwest Gas Holdings, Inc. (SWX) operates in the Utilities sector, specifically the Regulated Gas industry, with a market capitalization near $6.42B, listed on NYSE, employing roughly 11,122 people, carrying a beta of 0.62 to the broader market. Southwest Gas Holdings, Inc. Led by Karen S. Haller, public since 1972-06-01.
Snapshot as of May 15, 2026.
- Spot Price
- $87.44
- ATM IV
- 25.5%
- HV 20-Day
- 21.2%
- HV 60-Day
- 19.1%
- IV Rank
- 3.3%
- IV Percentile
- 50.0%
As of May 15, 2026, Southwest Gas Holdings, Inc. (SWX) ATM implied volatility is 25.5%. 20-day realized volatility is 21.2%, producing an IV-HV spread of +4.3 vol points. Options are pricing in more volatility than the stock has recently delivered, the volatility risk premium. IV rank is 3.3%.
How SWX iv/hv history Data Feeds Strategy Selection
Strategy selection on Southwest Gas Holdings, Inc. options does not derive from any single metric in isolation. The iv/hv history view above sits inside a broader read: ATM IV currently sits at 25.5% and dealer gamma exposure is positive, so dealer hedging is mechanically mean-reverting. Combine the iv/hv history data here with the volatility-skew surface, dealer-gamma exposure, max-pain level, and upcoming-events calendar to build a positioning thesis. Risk-defined structures (credit spreads, debit spreads, iron condors) are usually safer than naked positions while the regime is uncertain; the data on this page anchors the inputs but does not by itself constitute a trade thesis.
Learn how implied vs realized volatility is reported and how to read the data →
Frequently asked SWX iv/hv history questions
- Is SWX options pricing rich or cheap right now?
- As of May 15, 2026, Southwest Gas Holdings, Inc. (SWX) ATM IV is 25.5% against 20-day realized volatility of 21.2%. IV rank is 3.3%. SWX options are pricing in more volatility than the stock has recently realized: a positive variance risk premium worth 4.3 vol points.
- What is the SWX variance risk premium?
- The variance risk premium is the persistent gap between implied and subsequently realized volatility. In equity markets it averages positive because option sellers demand compensation for bearing variance shocks. SWX is currently priced consistently with this premium, which is one input to whether short-vol or long-vol structures carry their typical edge.
- What does SWX IV rank mean for strategy selection?
- IV rank normalizes the current ATM IV to its 1-year range: 0% is the low, 100% is the high. SWX's current rank of 3.3% signals where current pricing sits in its own 1-year history. High-rank regimes typically favor premium-selling structures (credit spreads, condors, covered calls); low-rank regimes typically favor premium-buying or long-volatility structures.