The takeaway
Banco Santander SA ADR shows a slight seasonal lean over 10 years of data — strongest in October (+3.7%) and softest in November (+3.1%).
Right now
In July, the stock has fallen 60% of years, averaging −0.7%, roughly 2.8 pts behind the S&P 500.
The full picture
Banco Santander SA ADR's most dependable month has been October, higher in 7 of 10 years; November has been its least reliable, up just 40% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Win rate % | ||||||||||||
| Median return % | ||||||||||||
| 2025 | ||||||||||||
| 2024 | ||||||||||||
| 2023 | ||||||||||||
| 2022 | ||||||||||||
| 2021 | ||||||||||||
| 2020 | ||||||||||||
| 2019 | ||||||||||||
| 2018 | ||||||||||||
| 2017 | ||||||||||||
| 2016 |
Month by month
The stock's clearest edge over the S&P 500 lands in February (+3.9 pts); it has trailed the market most in July (−2.8 pts).
“vs S&P” is Banco Santander SA ADR’s average for a month minus the S&P 500’s average for that same month — isolating Banco Santander SA ADR’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, October has closed higher 80% of the time versus 70% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) October 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
This is a stock you can almost set a calendar by, and October is the anchor — it has closed higher in 7 of 10 Octobers, the steadiest beat on its year.
The strength looks broad-based rather than freakish: its average (+3.7%) and median (+3.1%) sit close together, so no single blow-out year is flattering the figure. No month is steadier: October's returns vary by just 4.7% year to year, and even its worst October in 10 years lost only 3.0% — the gentlest downside anywhere on its calendar. Better still, that strength is the stock's own and not just a buoyant market — October has outpaced the S&P 500 by +2.7 points on average. Few peers keep such company in October — the typical stock clears it just 53% of the time.
It doesn't stand entirely alone — January, April, and July have leaned firm as well, if less emphatically. At the other end of the calendar, November is the year's low point, though even there the stock has stayed positive on average (+3.1%), a sign every month leans up, and the edge isn't year-round — the stock has trailed the S&P 500 in July, June, and March. Its roughest month on record was a −35.8% March in 2020 — a reminder of how hard even a seasonal name can fall.
One run worth flagging just ended: a 6-year streak of positive Octobers was snapped by a −1.7% close in 2025. If anything it has sharpened recently — the last five Octobers run ahead of the earlier years.
For a stock this dependable in October, the sharper question is the rest of the year — outside its strong stretch, the calendar gives far less to lean on.
Short answers on the stock's best month (October), its worst (November), and whether it really trades seasonally.
Only mildly. The stock's months are fairly even — October is the firmest (+3.7%) and November the softest (+3.1%), a narrow spread that points to weak seasonality rather than a strong calendar effect.
October has been the strongest, averaging +3.7% and closing higher in 7 of 10 years since 2016.
It's the weakest month, but it has still averaged a small gain (+3.1%) — quiet rather than genuinely bad.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade