The takeaway
Omnicom Group Inc shows a pronounced seasonal pattern over 10 years of data — strongest in November (+6.8%) and softest in May (−1.8%).
Right now
In July, the stock has fallen 30% of years, averaging −2.2%, roughly 4.4 pts behind the S&P 500.
The full picture
Omnicom Group Inc's most dependable month has been November, higher in 8 of 10 years; May has been its least reliable, up just 10% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in November (+4.4 pts); it has trailed the market most in July (−4.4 pts).
“vs S&P” is Omnicom Group Inc’s average for a month minus the S&P 500’s average for that same month — isolating Omnicom Group Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, November has closed higher 60% of the time versus 80% across the last 10 years — the pattern is weakening.
Figures are the typical (median) November 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. November stands out, higher in 8 of 10 Novembers, but it heads a clutch of months that pull the year reliably upward.
A typical November brings +4.7%, a shade under the +6.8% average. That reliability comes with real swings, mind — even November ranges by 8.5% from year to year, so any single year can land far from the average. Crucially, the gain is the stock's own rather than a rising tide's: November has cleared the S&P 500 by +4.4 points above the index. That consistency sets it apart from the field, where the average stock manages November only about 62% of the time.
The strength clusters rather than stands alone — November–March forms a firm stretch that carries much of the year. At the other end of the calendar, May has been the soft spot — the weakest of 3 months that average a loss (−1.8%), and the edge isn't year-round — the stock has trailed the S&P 500 in July, May, and October. Its roughest month on record was a −21.2% March in 2020 — a reminder of how hard even a seasonal name can fall.
The pattern has softened of late, November's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: November aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (November), its worst (May), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (November, +6.8%) has run well ahead of its worst (May, −1.8%) — the heatmap above shows how steady that gap has been year to year.
November has been the strongest, averaging +6.8% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −1.8% — historically a soft spot, though it still varies from year to year.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade