Seasonality
MRK seasonality — Merck & Co.
Over the last 11 years, MRK's strongest month on average has been August (+3.7%) and its weakest September (-1.4%).
Average return by month
Month-by-month statistics
| Month | Avg | Median | Up % | Best | Worst | Yrs |
|---|---|---|---|---|---|---|
| Jan | +1.42% | +2.05% | 50% | +10.8% | -6.1% | 10 |
| Feb | -0.54% | -3.43% | 40% | +12.3% | -10.4% | 10 |
| Mar | +1.14% | +0.48% | 70% | +7.1% | -3.5% | 10 |
| Apr | +0.08% | -1.99% | 40% | +8.5% | -9.2% | 10 |
| May | +0.53% | +1.43% | 70% | +8.7% | -9.8% | 10 |
| Jun | +2.29% | +2.49% | 60% | +8.2% | -4.2% | 10 |
| Jul | -0.84% | -1.09% | 30% | +8.5% | -8.6% | 10 |
| Aug | +3.74% | +4.16% | 70% | +13.5% | -4.5% | 10 |
| Sep | -1.39% | -1.60% | 30% | +3.4% | -5.5% | 10 |
| Oct | +1.34% | +2.67% | 60% | +17.5% | -14.0% | 10 |
| Nov | +3.39% | +0.60% | 67% | +21.9% | -14.9% | 9 |
| Dec | +0.81% | +1.25% | 70% | +6.4% | -3.8% | 10 |
Monthly returns heat map — MRK
price return, %| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 4.8 | 12.3 | -2.9 | -9.2 | 8.7 | 8.2 | 1.3 | 13.5 | -1.7 | 2.9 | -1.9 | +39.4% | |
| 2025 | -0.7 | -6.7 | -2.7 | -5.1 | -9.8 | 3.0 | -1.3 | 7.7 | -0.2 | 2.4 | 21.9 | 0.4 | +5.8% |
| 2024 | 10.8 | 5.3 | 3.8 | -2.1 | -2.9 | -1.4 | -8.6 | 4.7 | -4.1 | -9.9 | -0.7 | -2.1 | -8.8% |
| 2023 | -3.2 | -1.1 | 0.1 | 8.5 | -4.4 | 4.5 | -7.6 | 2.2 | -5.5 | -0.2 | -0.2 | 6.4 | -1.7% |
| 2022 | 6.3 | -6.0 | 7.1 | 8.1 | 3.8 | -0.9 | -2.0 | -4.5 | 0.9 | 17.5 | 8.8 | 0.8 | +44.8% |
| 2021 | -5.8 | -5.8 | 6.2 | -3.4 | 1.9 | 7.4 | -1.2 | -0.8 | -1.6 | 17.2 | -14.9 | 2.3 | -1.8% |
| 2020 | -6.1 | -10.4 | 0.5 | 3.1 | 1.7 | -4.2 | 3.8 | 6.3 | -2.7 | -9.3 | 6.9 | 1.8 | -10.1% |
| 2019 | -2.6 | 9.2 | 2.3 | -5.4 | 0.6 | 5.9 | -1.0 | 4.2 | -2.6 | 3.0 | 0.6 | 4.3 | +19.0% |
| 2018 | 5.3 | -8.5 | 0.5 | 8.1 | 1.1 | 2.0 | 8.5 | 4.1 | 3.4 | 3.8 | 7.8 | -3.7 | +35.8% |
| 2017 | 5.3 | 6.3 | -3.5 | -1.9 | 4.5 | -1.6 | -0.3 | -0.0 | 0.3 | -14.0 | 0.3 | 1.8 | -4.4% |
| 2016 | -3.8 |