Does Penumbra, Inc. (PEN) stock go up or down depending on the month?
Penumbra, Inc. month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +15.2% | -3.8% | -4.7% | -0.6% | -2.5% | -0.8% | +1.7% | |||||
| 2025 | +12.4% | +6.9% | -6.3% | +9.5% | -8.8% | -3.9% | -1.7% | +8.1% | -7.1% | -10.2% | +28.9% | +6.1% |
| 2024 | +0.3% | -6.8% | -5.0% | -12.0% | -3.6% | -5.0% | -7.2% | +21.1% | -4.0% | +17.8% | +6.7% | -2.7% |
| 2023 | +12.6% | +3.8% | +7.2% | +1.9% | +8.2% | +11.9% | -11.8% | -12.8% | -8.5% | -21.0% | +16.2% | +13.3% |
| 2022 | -21.3% | -1.9% | +0.2% | -22.3% | -14.9% | -15.2% | +11.9% | +17.8% | +15.5% | -9.6% | +22.2% | +6.2% |
| 2021 | +49.2% | +8.9% | -4.9% | +13.1% | -18.6% | +10.0% | -2.9% | +3.3% | -3.1% | +3.8% | -11.2% | +17.0% |
| 2020 | +6.8% | -5.5% | -2.7% | +9.9% | -2.8% | +3.7% | +24.1% | -5.8% | -7.1% | +34.3% | -15.0% | -21.1% |
| 2019 | +19.1% | -8.1% | +10.0% | -8.5% | +6.1% | +12.1% | +4.7% | -13.2% | -7.6% | +16.0% | +13.4% | -7.2% |
| 2018 | +5.8% | +8.6% | +6.9% | +7.5% | +29.4% | -14.1% | +3.0% | -2.4% | +7.8% | -9.2% | +2.4% | -12.2% |
| 2017 | +12.1% | +7.3% | +8.7% | +2.4% | -3.0% | +5.9% | -7.0% | +5.3% | +5.0% | +11.4% | +4.7% | -10.6% |
| 2016 | -20.5% | +8.9% | -1.3% | +18.5% | -3.1% | +12.7% | +14.8% | +3.3% | +7.7% | -13.2% | -6.1% | +3.1% |
| 2015 | -7.7% | +35.9% | +6.9% | |||||||||
| Average | +8.3% | +1.7% | +0.7% | +1.8% | -1.2% | +1.6% | +2.7% | +2.5% | -0.1% | +1.1% | +8.9% | -0.1% |
| % of years up | 82% | 55% | 45% | 64% | 27% | 55% | 55% | 60% | 40% | 45% | 73% | 55% |
| Years observed | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 11 | 11 | 11 |
Penumbra, Inc. month by month: the summary
Over 2015-2026, here's what Penumbra, Inc. (PEN) stock did each month, on average: January +8.3% (up 82% of 11 years), February +1.7% (up 55% of 11 years), March +0.7% (up 45% of 11 years), April +1.8% (up 64% of 11 years), May -1.2% (up 27% of 11 years), June +1.6% (up 55% of 11 years), July +2.7% (up 55% of 11 years), August +2.5% (up 60% of 10 years), September -0.1% (up 40% of 10 years), October +1.1% (up 45% of 11 years), November +8.9% (up 73% of 11 years), December -0.1% (up 55% of 11 years). In other words, PEN historically rose in January, February, March, April, June, July, August, October, November, and fell in May, September, December.
Does Penumbra, Inc. really go up in November?
Over 2015-2026, November is Penumbra, Inc.'s strongest month: +8.9% on average, positive in 8 of 11 years. At the other end, May shows -1.2%. But a monthly gap is often built on one or two extreme years — the table above shows it: look at the spread, not just the average. Seasonality only means something when it has a cause (selling season, earnings calendar, year-end tax effects); with no identified cause, it's probably noise.
Frequently asked questions
Does Penumbra, Inc. stock go up or down in January?
Over 11 years, PEN rose +8.3% on average in January, finishing the month up 9 times out of 11 (82%). Median: +12.1%. It's one of its most consistent months. ⚠️ 11 years of data is not a prediction.
Does Penumbra, Inc. stock go up or down in August?
Over 10 years, PEN rose +2.5% on average in August, finishing the month up 6 times out of 10 (60%). Median: +3.3%. Results are split year to year — there's no clear pattern. ⚠️ 10 years of data is not a prediction.
Does Penumbra, Inc. stock go up or down in July?
Over 11 years, PEN rose +2.7% on average in July, finishing the month up 6 times out of 11 (55%). Median: +1.7%. Results are split year to year — there's no clear pattern. ⚠️ 11 years of data is not a prediction.
Does Penumbra, Inc. stock go up or down in April?
Over 11 years, PEN rose +1.8% on average in April, finishing the month up 7 times out of 11 (64%). Median: +2.4%. Results are split year to year — there's no clear pattern. ⚠️ 11 years of data is not a prediction.
Does Penumbra, Inc. stock go up or down in February?
Over 11 years, PEN rose +1.7% on average in February, finishing the month up 6 times out of 11 (55%). Median: +3.8%. Results are split year to year — there's no clear pattern. ⚠️ 11 years of data is not a prediction.
Does Penumbra, Inc. stock go up or down in June?
Over 11 years, PEN rose +1.6% on average in June, finishing the month up 6 times out of 11 (55%). Median: +3.7%. Results are split year to year — there's no clear pattern. ⚠️ 11 years of data is not a prediction.
What is the best month to buy Penumbra, Inc. stock?
Historically, November: over the last 12 years, PEN gained +8.9% on average that month and finished up 73% of the time (11 years observed). May is the weakest month (-1.2%). This is not a prediction: 12 years is a small sample, and the past is under no obligation to repeat.
Why does Penumbra, Inc. stock often rise in November?
November has averaged as its best month over 12 years (+8.9%, up 73% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 12 years of history, not a prediction.
Is there a best month to invest in the stock market in general?
There's no universal rule: every stock has its own seasonality. For PEN it's November (+8.9% on average over 12 years) — another stock will look completely different. The calendar effects people cite ("sell in May", the year-end rally) are market-wide averages, not laws: on PEN, January is the most consistent month (82% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 12 times out of 12 can simply be chance: with 12 months and a dozen years, patterns appear naturally even in random data. Seasonality describes what happened; it doesn't explain why and predicts nothing. Treat it as context, never as a standalone buy signal.
What data is this table based on?
On PEN's real monthly closing prices from 2015 to 2026 (12 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.