Oceaneering International, Inc. (OII) Seasonality
Recurring seasonal patterns for OII — the calendar windows where Oceaneering International, Inc. 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.
OII seasonality at a glance
Over the last 10 years, OII's strongest seasonal window has been Apr 21 – May 21: it ended higher in 8 of 10 years (80% win rate) with an average return of +12.50% across a 30-day hold. On the weak side, OII has historically declined between Jul 31 – Aug 10, falling in 9 of 10 years (average -6.02%).
In total, our analysis finds 848 recurring seasonal windows for Oceaneering International, Inc. — 538 bullish and 310 bearish. The next high-win-rate window, Jul 28 – Aug 17, opens tomorrow. These figures describe historical behaviour only — not a forecast.
OII'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 23d ago | Jun 24 – Jul 4 | 10d | +4.18% | 80% | +6.09% |
| Completedended 44d ago | May 14 – Jun 13 | 30d | +7.00% | 80% | +1.73% |
| Upcomingtomorrow | Jul 28 – Aug 17 | 20d | -7.08% | 80% | — |
| Upcomingtomorrow | Jul 28 – Aug 27 | 30d | -5.19% | 80% | — |
| Upcomingin 2d | Jul 29 – Aug 8 | 10d | -6.29% | 80% | — |
| Upcomingin 2d | Jul 29 – Aug 18 | 20d | -7.08% | 80% | — |
| Upcomingin 2d | Jul 29 – Aug 28 | 30d | -5.73% | 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 OII seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
OII seasonality FAQ
What has historically been the best month to buy OII stock?
Based on the last 10 years of price data, OII's strongest seasonal window starts in April: Apr 21 to May 21, which ended higher in 8 of 10 years (80% win rate) with an average return of +12.50%. Past seasonal patterns do not guarantee future performance.
What is OII's strongest seasonal pattern?
OII's highest-win-rate pattern in our data is the Apr 21 – May 21 window (30-day hold): up in 8 of the last 10 years with an average move of +12.50%.
When has OII historically performed worst?
OII's weakest recurring window has been Jul 31 to Aug 10, declining in 9 of 10 years with an average return of -6.02%.
How reliable are OII's seasonal patterns?
Each OII pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. OII currently shows 848 recurring windows (538 bullish, 310 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is OII stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Oceaneering International, Inc.'s price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where OII 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.