The takeaway
Intuitive Surgical Inc shows a moderate seasonal pattern over 10 years of data — strongest in November (+4.6%) and softest in September (−0.7%).
Right now
In July, the stock has risen 70% of years, averaging +3.4%, about +1.3 pts better than the S&P 500.
The full picture
Intuitive Surgical Inc's most dependable month has been November, 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 June (+3.8 pts); it has trailed the market most in March (−1.0 pts).
“vs S&P” is Intuitive Surgical Inc’s average for a month minus the S&P 500’s average for that same month — isolating Intuitive Surgical Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, November has closed higher 80% of the time versus 80% across the last 10 years — the pattern is holding.
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.
Its average (+4.6%) and median (+6.2%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. Crucially, the gain is the stock's own rather than a rising tide's: November has cleared the S&P 500 by +2.3 points above the index. That consistency sets it apart from the field, where the average stock manages November only about 62% of the time.
A few other months pull their weight: February, March, and April have also closed higher more often than not. On the other side of the ledger, September has been the soft spot — the only month to average an outright loss (−0.7%), and the edge isn't year-round — the stock has trailed the S&P 500 in March, December, and September. Its roughest month on record was a −21.7% April in 2022 — a reminder of how hard even a seasonal name can fall.
Reassuringly, the tendency has held its shape: the recent five years still track the years behind them.
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 (September), and whether it really trades seasonally.
Yes, to a moderate degree. Since 2016 its best month (November, +4.6%) has run well ahead of its worst (September, −0.7%) — the heatmap above shows how steady that gap has been year to year.
November has been the strongest, averaging +4.6% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −0.7% — 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