Phillips 66 (PSX) Historical Volatility

Tracking PSX historical volatility helps you see how much Phillips 66's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Phillips 66's HV tells you what really happened. Use our scanner to monitor PSX 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The PSX 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Phillips 66's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

Phillips 66 operates as an energy manufacturing and logistics company. It operates through four segments: Midstream, Chemicals, Refining, and Marketing and Specialties (M&S). The Midstream segment transports crude oil and other feedstocks; delivers refined petroleum products to market; provides terminaling and storage services for crude oil and refined petroleum products; transports, stores, fractionates, exports, and markets natural gas liquids; provides other fee-based processing services; and gathers, processes, transports, and markets natural gas. The Chemicals segment produces and markets ethylene and other olefin products; aromatics and styrenics products, such as benzene, cyclohexane, styrene, and polystyrene; and various specialty chemical products, including organosulfur chemicals, solvents, catalysts, and chemicals used in drilling and mining.

The Refining segment refines crude oil and other feedstocks into petroleum products, such as gasolines, distillates, aviation, and renewable fuels at 12 refineries in the United States and Europe. The M&S segment purchases for resale and markets refined petroleum products, including gasolines, distillates, and aviation fuels primarily in the United States and Europe. This segment also manufactures and markets specialty products, such as base oils and lubricants. The company was founded in 1875 and is headquartered in Houston, Texas.

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Phillips 66's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where PSX HV is running hot, cold, or in line. Make the PSX 30 day historical volatility — and every other window — work for your edge instead of against it.