The takeaway
ONEOK Inc shows a slight seasonal lean over 10 years of data — strongest in March (−1.6%) and softest in September (+0.4%).
Right now
In July, the stock has risen 70% of years, averaging +0.8%, roughly 1.4 pts behind the S&P 500.
The full picture
ONEOK Inc's most dependable month has been March, higher in 8 of 10 years; September has been its least reliable, up just 50% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in April (+5.4 pts); it has trailed the market most in March (−2.6 pts).
“vs S&P” is ONEOK Inc’s average for a month minus the S&P 500’s average for that same month — isolating ONEOK Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, March has closed higher 80% of the time versus 80% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) March return and how often it rose — the last 5 years versus the last 10(the heatmap’s default window). This verdict stays anchored to that 10-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Dependability is the through-line here. March stands out, higher in 8 of 10 Marches, but it heads a clutch of months that pull the year reliably upward.
Its average (−1.6%) and median (+4.3%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. That reliability comes with real swings, mind — even March ranges by 23.4% from year to year, so any single year can land far from the average. That consistency sets it apart from the field, where the average stock manages March only about 56% of the time.
The strength clusters rather than stands alone — November–July forms a firm stretch that carries much of the year. At the other end of the calendar, September is the year's quietest corner, essentially flat on average, and the edge isn't year-round — the stock has trailed the S&P 500 in March, December, and July.
If anything it has sharpened recently — the last five Marches run ahead of the earlier years.
The takeaway is less about when to buy than what to expect: March aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (March), its worst (September), and whether it really trades seasonally.
Only mildly. The stock's months are fairly even — March is the firmest (−1.6%) and September the softest (+0.4%), a narrow spread that points to weak seasonality rather than a strong calendar effect.
March has been the strongest, averaging −1.6% and closing higher in 8 of 10 years since 2016.
It's the weakest month, but it has still averaged a small gain (+0.4%) — quiet rather than genuinely bad.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade