The takeaway
Millicom International Cellular SA shows a pronounced seasonal pattern over 7 years of data — strongest in November (+8.3%) and softest in June (−5.0%).
Right now
In July, the stock has risen 57% of years, averaging +3.2%, about +1.0 pts better than the S&P 500.
The full picture
Millicom International Cellular SA's most dependable month has been November, higher in 5 of 7 years; June has been its least reliable, up just 29% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in November (+6.0 pts); it has trailed the market most in June (−5.2 pts).
“vs S&P” is Millicom International Cellular SA’s average for a month minus the S&P 500’s average for that same month — isolating Millicom International Cellular SA’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, November has closed higher 60% of the time versus 71% across the last 7 years — the pattern is weakening.
Figures are the typical (median) November return and how often it rose — the last 5 years versus the last 7(the heatmap’s default window). This verdict stays anchored to that 7-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Strip the year back and a single month does the heavy lifting: November, up in 5 of 7 Novembers while the other eleven tend to blur together.
Its average (+8.3%) and median (+7.5%) 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 November ranges by 15.2% 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 +6.0 points above the index. Some of that is a strong month market-wide, mind — November rises for about 62% of stocks — so the tendency is real if not unique.
No other month comes close to matching it — the rest of the calendar is unremarkable by comparison. The weaker half of the year is plainer: June has been the soft spot — the weakest of 5 months that average a loss (−5.0%), and the edge isn't year-round — the stock has trailed the S&P 500 in June, September, and October. Its roughest month on record was a −37.9% 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. With a short 7-year record, the signal is best held loosely.
Short answers on the stock's best month (November), its worst (June), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2019 its best month (November, +8.3%) has run well ahead of its worst (June, −5.0%) — the heatmap above shows how steady that gap has been year to year.
November has been the strongest, averaging +8.3% and closing higher in 5 of 7 years since 2019.
It's the weakest, averaging −5.0% — 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