Phillips 66 (PSX) Seasonality
Recurring seasonal patterns for PSX — the calendar windows where Phillips 66 has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
PSX seasonality at a glance
Over the last 10 years, PSX's strongest seasonal window has been Jul 19 – Jul 29: it ended higher in 10 of 10 years (100% win rate) with an average return of +3.33% across a 10-day hold. On the weak side, PSX has historically declined between Jun 10 – Jun 20, falling in 8 of 10 years (average -3.22%).
In total, our analysis finds 721 recurring seasonal windows for Phillips 66 — 498 bullish and 223 bearish. The next high-win-rate window, Aug 2 – Aug 12, opens in 6 days. These figures describe historical behaviour only — not a forecast.
PSX's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 31d ago | Jun 16 – Jun 26 | 10d | -2.81% | 80% | -0.20% |
| Completedended 36d ago | Jun 11 – Jun 21 | 10d | -1.62% | 80% | -6.72% |
| Upcomingin 6d | Aug 2 – Aug 12 | 10d | +1.59% | 80% | — |
| Upcomingin 9d | Aug 5 – Aug 15 | 10d | +1.41% | 80% | — |
| Upcomingin 16d | Aug 12 – Aug 22 | 10d | -1.43% | 80% | — |
| Upcomingin 24d | Aug 20 – Aug 30 | 10d | +3.24% | 80% | — |
| Upcomingin 25d | Aug 21 – Aug 31 | 10d | +2.16% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore PSX seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
PSX seasonality FAQ
What has historically been the best month to buy PSX stock?
Based on the last 10 years of price data, PSX's strongest seasonal window starts in July: Jul 19 to Jul 29, which ended higher in 10 of 10 years (100% win rate) with an average return of +3.33%. Past seasonal patterns do not guarantee future performance.
What is PSX's strongest seasonal pattern?
PSX's highest-win-rate pattern in our data is the Jul 19 – Jul 29 window (10-day hold): up in 10 of the last 10 years with an average move of +3.33%.
When has PSX historically performed worst?
PSX's weakest recurring window has been Jun 10 to Jun 20, declining in 8 of 10 years with an average return of -3.22%.
How reliable are PSX's seasonal patterns?
Each PSX pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. PSX currently shows 721 recurring windows (498 bullish, 223 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is PSX stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Phillips 66's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where PSX has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.