What is Merck & Co. Inc.'s average monthly return?

Merck & Co. Inc. has averaged about 1.07% per month, positive in roughly 57% of months.

MRK

Merck & Co. Inc.Stock · Healthcare

$129.56+$4.19 (+3.34%)as of market close, Jul 2, 2026

MRK monthly returns

Merck & Co. Inc. has averaged 1.07% per month, positive in 57% of months. Month-by-month returns for Merck & Co. Inc. (MRK) below, through July 2, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.

Average month

+1.1%

667 months

Best month

+31.3%

Oct 1974

Worst month

-26.0%

Sep 2004

Positive months

57%

of all months

Merck & Co. Inc. monthly returns#

Merck & Co. Inc. total return by month
Month	Path	Total return
Jul 2026		+0.8%
Jun 2026		+8.2%
May 2026		+8.7%
Apr 2026		-9.2%
Mar 2026		-2.1%
Feb 2026		+12.3%
Jan 2026		+4.8%
Dec 2025		+1.3%
Nov 2025		+21.9%
Oct 2025		+2.4%
Sep 2025		+0.8%
Aug 2025		+7.7%
Jul 2025		-1.3%
Jun 2025		+4.0%
May 2025		-9.8%
Apr 2025		-5.1%
Mar 2025		-1.9%
Feb 2025		-6.6%
Jan 2025		-0.7%
Dec 2024		-1.3%
Nov 2024		-0.7%
Oct 2024		-9.9%
Sep 2024		-3.5%
Aug 2024		+4.7%
Jul 2024		-8.6%
Jun 2024		-0.8%
May 2024		-2.8%
Apr 2024		-2.1%
Mar 2024		+4.4%
Feb 2024		+5.3%
Jan 2024		+10.8%
Dec 2023		+7.1%
Nov 2023		-0.2%
Oct 2023		-0.2%
Sep 2023		-4.9%
Aug 2023		+2.2%
Jul 2023		-7.6%
Jun 2023		+5.2%
May 2023		-4.4%
Apr 2023		+8.5%
Mar 2023		+0.8%
Feb 2023		-1.1%
Jan 2023		-3.2%
Dec 2022		+1.4%
Nov 2022		+8.8%
Oct 2022		+17.5%
Sep 2022		+1.7%
Aug 2022		-4.5%
Jul 2022		-2.0%
Jun 2022		-0.1%
May 2022		+3.8%
Apr 2022		+8.1%
Mar 2022		+8.1%
Feb 2022		-6.0%
Jan 2022		+6.3%
Dec 2021		+3.3%
Nov 2021		-14.9%
Oct 2021		+17.2%
Sep 2021		-0.7%
Aug 2021		-0.8%
Jul 2021		-1.2%
Jun 2021		+8.3%
May 2021		+1.9%
Apr 2021		-3.4%
Mar 2021		+7.1%
Feb 2021		-5.8%
Jan 2021		-5.8%
Dec 2020		+2.6%
Nov 2020		+6.9%
Oct 2020		-9.3%
Sep 2020		-2.0%
Aug 2020		+6.3%
Jul 2020		+3.8%
Jun 2020		-3.4%
May 2020		+1.7%
Apr 2020		+3.1%
Mar 2020		+1.3%
Feb 2020		-10.4%
Jan 2020		-6.1%
Dec 2019		+5.0%
Nov 2019		+0.6%
Oct 2019		+2.9%
Sep 2019		-2.0%
Aug 2019		+4.2%
Jul 2019		-1.0%
Jun 2019		+6.6%
May 2019		+0.6%
Apr 2019		-5.4%
Mar 2019		+3.0%
Feb 2019		+9.2%
Jan 2019		-2.6%
Dec 2018		-3.0%
Nov 2018		+7.8%
Oct 2018		+3.8%
Sep 2018		+4.1%
Aug 2018		+4.1%
Jul 2018		+8.5%
Jun 2018		+2.7%
May 2018		+1.1%
Apr 2018		+8.1%
Mar 2018		+1.3%
Feb 2018		-8.5%
Jan 2018		+5.3%
Dec 2017		+2.7%
Nov 2017		+0.3%
Oct 2017		-14.0%
Sep 2017		+1.0%
Aug 2017		-0.0%
Jul 2017		-0.3%
Jun 2017		-0.8%
May 2017		+4.5%
Apr 2017		-1.9%
Mar 2017		-2.8%
Feb 2017		+6.3%
Jan 2017		+5.3%
Dec 2016		-3.1%
Nov 2016		+4.2%
Oct 2016		-5.9%
Sep 2016		+0.1%
Aug 2016		+7.0%

Monthly total return (since Aug 2021)

-20%-10%+0%+10%+20%

20222023202420252026

Methodology#

Monthly returns are total returns (dividends reinvested), computed from MRK's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.

See also: S&P 500 · Nasdaq-100 · Dow Jones · Russell 2000 · US Bond Market · Gold · Silver · Bitcoin · Ethereum

FAQ

What is Merck & Co. Inc.'s average monthly return?: Merck & Co. Inc. (MRK) has averaged about 1.07% per month, positive in roughly 57% of months. The best month was Oct 1974 (+31.3%) and the worst was Sep 2004 (-26.0%).