Does Amgen (AMGN) stock go up or down depending on the month?
Amgen month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +4.5% | +13.5% | -9.4% | -1.6% | -2.7% | +7.5% | +6.4% | |||||
| 2025 | +9.5% | +7.9% | +1.1% | -6.6% | -0.9% | -3.1% | +5.7% | -2.5% | -1.9% | +5.8% | +15.8% | -5.3% |
| 2024 | +9.1% | -12.9% | +3.8% | -3.7% | +11.6% | +2.2% | +6.4% | +0.4% | -3.5% | -0.6% | -11.6% | -7.9% |
| 2023 | -3.9% | -8.2% | +4.4% | -0.8% | -8.0% | +0.6% | +5.5% | +9.5% | +4.8% | -4.9% | +5.5% | +6.8% |
| 2022 | +1.0% | -0.3% | +6.8% | -3.6% | +10.1% | -5.2% | +1.7% | -2.9% | -6.2% | +19.9% | +5.9% | -8.3% |
| 2021 | +5.0% | -6.8% | +10.6% | -3.7% | -0.7% | +2.4% | -0.9% | -6.6% | -5.7% | -2.7% | -3.9% | +13.1% |
| 2020 | -10.4% | -7.6% | +1.5% | +18.0% | -4.0% | +2.7% | +3.7% | +3.5% | +0.3% | -14.6% | +2.4% | +3.5% |
| 2019 | -3.9% | +1.6% | -0.1% | -5.6% | -7.0% | +10.5% | +1.2% | +11.8% | -7.2% | +10.2% | +10.1% | +2.7% |
| 2018 | +7.0% | -1.2% | -7.2% | +2.3% | +2.9% | +2.8% | +6.5% | +1.7% | +3.7% | -7.0% | +8.0% | -6.5% |
| 2017 | +7.2% | +12.7% | -7.1% | -0.5% | -4.9% | +10.9% | +1.3% | +1.9% | +4.9% | -6.0% | +0.3% | -1.0% |
| 2016 | -5.9% | -6.8% | +5.4% | +5.6% | -0.2% | -3.7% | +13.1% | -1.1% | -1.9% | -15.4% | +2.1% | +1.5% |
| 2015 | -4.4% | +3.6% | +1.4% | -1.2% | -1.0% | -1.8% | +15.0% | -14.0% | -8.9% | +14.4% | +1.8% | +0.8% |
| 2014 | +4.3% | +4.3% | -0.5% | -9.4% | +3.8% | +2.1% | +7.6% | +9.4% | +0.8% | +15.5% | +1.9% | -3.6% |
| 2013 | +7.1% | +12.0% | +1.7% | -3.5% | -1.9% | +9.8% | +0.6% | +2.7% | +3.8% | -1.8% | +0.0% | |
| Average | +1.5% | +0.5% | +1.6% | -0.6% | -0.3% | +1.9% | +5.9% | +0.9% | -1.4% | +1.4% | +2.8% | -0.3% |
| % of years up | 62% | 50% | 64% | 29% | 29% | 64% | 93% | 62% | 46% | 46% | 77% | 46% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
Amgen month by month: the summary
Over 2013-2026, here's what Amgen (AMGN) stock did each month, on average: January +1.5% (up 62% of 13 years), February +0.5% (up 50% of 14 years), March +1.6% (up 64% of 14 years), April -0.6% (up 29% of 14 years), May -0.3% (up 29% of 14 years), June +1.9% (up 64% of 14 years), July +5.9% (up 93% of 14 years), August +0.9% (up 62% of 13 years), September -1.4% (up 46% of 13 years), October +1.4% (up 46% of 13 years), November +2.8% (up 77% of 13 years), December -0.3% (up 46% of 13 years). In other words, AMGN historically rose in January, February, March, June, July, August, October, November, and fell in April, May, September, December.
Does Amgen really go up in July?
Over 2013-2026, July is Amgen's strongest month: +5.9% on average, positive in 13 of 14 years. At the other end, September shows -1.4%. 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 Amgen stock go up or down in August?
Over 13 years, AMGN rose +0.9% on average in August, finishing the month up 8 times out of 13 (62%). Median: +0.6%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Amgen stock go up or down in November?
Over 13 years, AMGN rose +2.8% on average in November, finishing the month up 10 times out of 13 (77%). Median: +2.1%. It's one of its most consistent months. ⚠️ 13 years of data is not a prediction.
Does Amgen stock go up or down in June?
Over 14 years, AMGN rose +1.9% on average in June, finishing the month up 9 times out of 14 (64%). Median: +2.1%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Amgen stock go up or down in March?
Over 14 years, AMGN rose +1.6% on average in March, finishing the month up 9 times out of 14 (64%). Median: +1.4%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Amgen stock go up or down in January?
Over 13 years, AMGN rose +1.5% on average in January, finishing the month up 8 times out of 13 (62%). Median: +4.3%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Amgen stock go up or down in October?
Over 13 years, AMGN rose +1.4% on average in October, finishing the month up 6 times out of 13 (46%). Median: -0.6%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
What is the best month to buy Amgen stock?
Historically, July: over the last 14 years, AMGN gained +5.9% on average that month and finished up 93% of the time (14 years observed). September is the weakest month (-1.4%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does Amgen stock often rise in July?
July has averaged as its best month over 14 years (+5.9%, up 93% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 14 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 AMGN it's July (+5.9% on average over 14 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 AMGN, July is the most consistent month (93% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 14 times out of 14 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 AMGN's real monthly closing prices from 2013 to 2026 (14 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.