Bayer (BAYN-DE)
EURO STOXX 50 · Health Care · data since 1996-12-16 · last close 2026-09-09
Bayer (BAYN-DE) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 20.4 | -5.7 | -6.3 | -3.1 | -4.0 | 32.5 | -0.7 | 2.1 | 0.5 | · | · | · |
| 2025 | 12.0 | 4.9 | -2.8 | 4.8 | 7.4 | 3.2 | 7.1 | 2.6 | 0.6 | -4.5 | 13.1 | 21.4 |
| 2024 | -14.1 | -2.8 | 1.2 | -3.4 | 3.3 | -6.6 | 4.2 | 1.4 | 8.8 | -18.2 | -21.8 | -0.4 |
| 2023 | 17.9 | -1.3 | 4.3 | 1.8 | -9.1 | -2.8 | 4.9 | -4.9 | -10.1 | -10.5 | -22.9 | 7.2 |
| 2022 | 14.6 | -4.3 | 20.6 | 1.3 | 9.3 | -14.8 | 0.5 | -7.7 | -9.9 | 12.2 | 4.1 | -12.7 |
| 2021 | 3.6 | 0.4 | 7.7 | 3.6 | -4.3 | -0.5 | -1.8 | -6.3 | -0.3 | 3.5 | -8.5 | 5.6 |
| 2020 | 0.3 | -10.7 | -18.9 | 19.1 | 1.0 | 8.3 | -14.5 | -1.2 | -4.0 | -24.3 | 19.6 | -0.2 |
| 2019 | 9.3 | 6.2 | -18.0 | 7.9 | -11.0 | 15.4 | -3.6 | 14.6 | -3.9 | 7.6 | -1.3 | 6.0 |
| 2018 | 1.4 | -8.7 | -4.6 | 8.2 | 5.5 | -5.9 | 1.0 | -15.6 | -4.8 | -11.4 | -4.7 | -6.2 |
| 2017 | 3.2 | 1.5 | 4.1 | 5.1 | 6.5 | -4.2 | -5.3 | 0.3 | 7.3 | -3.1 | -4.1 | -2.9 |
| 2016 | -10.7 | -6.7 | 7.1 | -2.5 | -12.8 | 5.1 | 6.9 | -0.3 | -6.8 | 1.0 | -1.9 | 11.9 |
| 2015 | 13.3 | 3.1 | 6.0 | -7.2 | 1.1 | -2.8 | 7.0 | -9.9 | -5.4 | 6.0 | 4.1 | -8.3 |
| 2014 | -4.0 | 5.1 | -4.6 | 4.0 | 6.1 | -2.8 | -4.1 | 3.2 | 8.7 | 2.3 | 6.6 | -6.6 |
| 2013 | 1.1 | 4.4 | 6.1 | 0.8 | 4.6 | -1.2 | 6.6 | -3.8 | 3.7 | 5.0 | 7.3 | 3.8 |
| 2012 | 8.4 | 3.7 | -5.0 | 4.0 | -3.9 | 11.0 | 9.0 | -0.4 | 8.4 | 0.5 | 3.5 | 3.4 |
| 2011 | -2.6 | 4.3 | -2.7 | 8.6 | -1.6 | -2.6 | 0.9 | -19.7 | -7.7 | 11.7 | 5.3 | 1.3 |
| 2010 | -11.6 | -1.6 | 2.9 | -4.0 | -2.5 | 1.1 | -4.1 | 9.2 | 6.2 | 4.8 | 4.3 | -1.2 |
| 2009 | 0.1 | -8.5 | -5.5 | 4.5 | 10.9 | -4.9 | 3.3 | 6.6 | 12.5 | -0.3 | 8.0 | 9.8 |
| 2008 | -12.3 | -7.3 | -0.2 | 10.7 | 4.0 | -6.2 | 3.7 | -2.5 | -4.1 | -16.7 | -5.8 | 2.1 |
| 2007 | 11.2 | -3.8 | 10.1 | 7.5 | 6.1 | 4.9 | -6.8 | 10.8 | -3.6 | 3.1 | -2.1 | 11.0 |
| 2006 | -2.6 | -1.7 | -2.2 | 10.7 | -1.7 | 2.6 | 7.3 | 0.3 | 4.0 | -1.9 | -1.3 | 4.4 |
| 2005 | -2.2 | 8.2 | -3.5 | -0.4 | 10.0 | 1.1 | 6.8 | -3.0 | 6.6 | -5.0 | 16.9 | 4.2 |
| 2004 | 5.0 | -6.5 | -13.1 | 14.7 | 5.3 | 1.3 | -6.4 | -5.5 | 5.0 | 0.9 | 7.3 | 4.6 |
| 2003 | -19.9 | -25.3 | 2.0 | 38.3 | 6.2 | 16.2 | 5.0 | -8.2 | -4.7 | 11.4 | 9.1 | 3.0 |
| 2002 | 3.9 | -0.9 | 5.4 | -4.0 | -4.3 | -6.8 | -22.3 | -3.9 | -28.0 | 9.8 | 19.9 | -11.0 |
| 2001 | -4.6 | -0.4 | -9.3 | 1.6 | -1.7 | -0.7 | 1.9 | -25.2 | -11.1 | 5.0 | 10.4 | -1.7 |
| 2000 | -13.5 | 9.7 | 6.8 | -2.0 | -7.0 | -1.3 | 10.4 | 5.3 | -11.3 | 17.4 | 1.6 | 11.2 |
| 1999 | -6.0 | -6.0 | 9.3 | 13.6 | -5.0 | 6.9 | 1.1 | 3.6 | -10.9 | 3.7 | 8.2 | 10.2 |
| 1998 | 3.2 | 11.4 | 9.5 | -3.4 | 5.5 | 9.0 | -10.3 | -20.7 | -4.7 | 3.8 | 8.4 | -1.2 |
| 1997 | -1.9 | 15.0 | -2.1 | -3.3 | -0.5 | 0.9 | 12.8 | -13.5 | 6.2 | -13.1 | 8.0 | 1.4 |
| 1996 | · | · | · | · | · | · | · | · | · | · | · | 4.4 |
| Avg | 0.8 | -0.8 | 0.1 | 4.6 | 0.8 | 1.8 | 0.7 | -3.1 | -1.8 | 0.0 | 3.2 | 2.5 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
BAYN-DE seasonality — average by calendar month
Bayer has monthly history back to 1996. Its strongest month by median is November — positive in 19 of 29 years, median +4.3%. September is the soft spot, down in 17 of 29 with a median of -3.9%. Across its full record it has closed 54% of months higher, swings ±8.8% in an average month and has fallen 82.3% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | +0.8% | -0.8% | +0.1% | +4.6% | +0.8% | +1.9% | +0.7% | -3.1% | -1.8% | +0.0% | +3.1% | +2.5% |
| Win rate | 57%/30 | 43%/30 | 50%/30 | 67%/30 | 53%/30 | 50%/30 | 63%/30 | 40%/30 | 41%/29 | 62%/29 | 66%/29 | 63%/30 |
Win rate = share of positive months / sample size.
BAYN-DE risk & extremes
BAYN-DE drawdown & rolling returns
Percent below the all-time high at each month-end — how far underwater the asset was.
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Frequently asked questions
What was Bayer's best month?+
Bayer's strongest completed month on record is April 2003, at +38.34%.
What was Bayer's worst month?+
Its weakest completed month on record is September 2002, at -27.98%.
Is Bayer up this year?+
Bayer is up 33.48% year to date, measured from its last close before 1 January.
What is Bayer's 1-year return?+
+74.96% over the past twelve months, comparing the latest close with the most recent close on or before the same date a year earlier.
What is Bayer's biggest drawdown?+
The deepest peak-to-trough fall on record is 82.3%, measured on month-end closes since 1996.
Which calendar month is historically best for Bayer?+
April has the highest average return across every completed April since 1996. An average is not a forecast.
About Bayer
Bayer is a EURO STOXX 50 company, a health care business worth about $56 billion. It turns lab coats into cash flows — with price receipts on this site going back to 1996. And the long game: $100 at its first close here (1996) would be about $320 today.
Did you know?
- Its best month on record was April 2003 at +38.34%; its worst, September 2002 at -27.98%.
Trivia for entertainment — the numbers come from our price data; the jokes don't.