Merck & Co (MRK) returns
Merck returns over 10 years
$1,000 invested in Merck ten years ago was worth $3,613 at the close on October 30, 2026, with dividends reinvested: an average return of 13.7% a year. The same $1,000 in the S&P 500 (SPY) became $4,166.
Total return by period
| Period | Total return | A year, on average | $1,000 became | S&P 500 (SPY) |
|---|---|---|---|---|
| 1 month | +2.9% | — | $1,029 | -0.9% |
| 3 months | +15.9% | — | $1,159 | +2.1% |
| Year to date | +45.0% | — | $1,450 | +11.7% |
| 1 year | +78.4% | — | $1,784 | +12.4% |
| 3 years | +59.6% | +16.9% | $1,596 | +88.5% |
| 5 years | +97.8% | +14.6% | $1,978 | +76.0% |
| 10 years | +261.3% | +13.7% | $3,613 | +316.6% |
Merck return by calendar year
| Year | MRK | S&P 500 (SPY) | Difference |
|---|---|---|---|
| 2026 to date | +45.0% | +11.7% | +33.3% |
| 2025 | +9.8% | +17.7% | -7.9% |
| 2024 | -6.3% | +24.9% | -31.1% |
| 2023 | +1.0% | +26.2% | -25.2% |
| 2022 | +49.4% | -18.2% | +67.6% |
| 2021 | +1.7% | +28.7% | -27.0% |
| 2020 | -7.2% | +18.4% | -25.6% |
| 2019 | +22.3% | +31.2% | -9.0% |
| 2018 | +40.0% | -4.6% | +44.6% |
| 2017 | -1.5% | +21.7% | -23.2% |
| 2016 | +15.1% | +12.0% | +3.1% |
Past returns do not predict future returns. Returns are computed from our daily closes, adjusted for splits and with dividends reinvested on their ex-dates; taxes and trading costs are left out.
See also: MRK financials · MRK valuation
No forecast, no recommendation. This page describes Merck & Co from published data; it is not advice to buy, sell or hold any security.
Figures as of the close on Oct 30, 2026 unless a row says otherwise. Prices are split adjusted; returns include dividends reinvested. Data may be delayed. See the disclaimer and how TrendArc works.