Quest Diagnostics (DGX)
S&P 500 · Health Care · data since 1996-12-17 · last close 2026-09-09
Quest Diagnostics (DGX) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 8.3 | 13.3 | -7.5 | -0.5 | 0.4 | 8.8 | 10.4 | 3.1 | -2.0 | · | · | · |
| 2025 | 8.6 | 6.0 | -2.1 | 5.8 | -2.7 | 3.6 | -6.4 | 8.5 | 4.9 | -7.3 | 7.5 | -8.3 |
| 2024 | -6.4 | -2.8 | 6.6 | 4.4 | 2.7 | -3.6 | 4.5 | 10.3 | -1.1 | 0.2 | 5.1 | -7.3 |
| 2023 | -4.7 | -6.8 | 2.3 | -1.4 | -4.4 | 6.0 | -3.3 | -2.7 | -7.3 | 7.4 | 5.5 | 0.5 |
| 2022 | -21.6 | -2.8 | 4.3 | -1.7 | 5.4 | -5.7 | 3.2 | -8.2 | -2.1 | 17.7 | 5.7 | 3.0 |
| 2021 | 8.9 | -10.5 | 11.0 | 3.3 | -0.2 | 0.2 | 8.0 | 7.8 | -4.9 | 1.4 | 1.3 | 16.4 |
| 2020 | 4.2 | -4.2 | -24.3 | 38.2 | 7.4 | -3.6 | 12.0 | -12.5 | 2.9 | 7.2 | 1.5 | -3.9 |
| 2019 | 5.6 | -0.9 | 3.9 | 7.8 | -0.5 | 6.2 | 0.8 | 0.3 | 4.5 | -4.9 | 5.2 | 0.2 |
| 2018 | 7.9 | -2.6 | -2.7 | 1.4 | 5.3 | 3.2 | -1.6 | 2.1 | -1.9 | -12.4 | -5.9 | -6.0 |
| 2017 | 0.5 | 6.0 | 0.8 | 8.0 | 3.1 | 2.2 | -2.2 | 0.0 | -13.6 | 0.6 | 5.0 | 0.0 |
| 2016 | -7.2 | 1.3 | 7.4 | 5.8 | 2.7 | 5.5 | 6.6 | -4.1 | 2.7 | -3.8 | 7.4 | 5.1 |
| 2015 | 6.5 | -1.3 | 9.6 | -6.6 | 5.3 | -3.6 | 2.3 | -8.1 | -9.3 | 11.2 | 0.5 | 4.1 |
| 2014 | -1.4 | 0.9 | 9.3 | -2.9 | 7.1 | -2.0 | 4.7 | 3.5 | -4.0 | 5.2 | 2.9 | 2.7 |
| 2013 | -0.0 | -3.1 | 1.1 | -0.2 | 9.8 | -1.5 | -3.8 | 0.5 | 5.9 | -3.0 | 1.7 | -12.1 |
| 2012 | 0.3 | -0.1 | 5.6 | -5.7 | -1.4 | 5.6 | -2.5 | 3.5 | 5.2 | -9.0 | 0.1 | 0.8 |
| 2011 | 5.7 | -0.3 | 1.7 | -2.1 | 3.6 | 1.3 | -8.6 | -7.3 | -1.4 | 13.3 | 5.1 | -1.0 |
| 2010 | -7.7 | 1.9 | 2.7 | -1.8 | -7.7 | -5.7 | -5.4 | -7.4 | 16.3 | -2.6 | 0.4 | 9.4 |
| 2009 | -4.7 | -7.1 | 3.6 | 8.3 | 1.7 | 8.1 | -3.0 | -1.2 | -3.1 | 7.2 | 3.6 | 4.2 |
| 2008 | -6.8 | -3.1 | -5.0 | 11.1 | 0.5 | -3.9 | 9.9 | 1.7 | -4.4 | -9.3 | -0.5 | 11.5 |
| 2007 | -0.8 | -2.8 | -2.2 | -1.8 | 0.3 | 5.4 | 7.6 | -1.3 | 5.5 | -7.8 | 3.5 | -3.9 |
| 2006 | -3.8 | 7.0 | -3.0 | 8.8 | 0.0 | 7.5 | 0.5 | 6.9 | -4.8 | -18.5 | 6.9 | -0.3 |
| 2005 | -0.1 | 4.3 | 5.8 | 0.8 | -0.8 | 1.5 | -3.5 | -2.6 | 1.1 | -7.4 | 7.2 | 2.8 |
| 2004 | 16.5 | -2.5 | -0.1 | 2.0 | 2.1 | -1.4 | -3.2 | 4.3 | 3.1 | -0.6 | 7.1 | 1.9 |
| 2003 | -5.5 | -1.9 | 13.1 | 0.1 | 6.0 | 0.7 | -6.3 | 0.4 | 1.1 | 11.6 | 7.9 | 0.2 |
| 2002 | -3.4 | 2.3 | 16.8 | 10.9 | -4.9 | -1.6 | -29.8 | -7.2 | 9.8 | 3.7 | -12.6 | 2.0 |
| 2001 | -27.1 | 1.8 | -15.7 | 38.6 | 0.3 | 21.1 | -7.7 | -9.3 | -1.5 | 6.0 | -5.5 | 16.1 |
| 2000 | 11.3 | 0.9 | 15.8 | 46.4 | 15.4 | 11.4 | 35.0 | 22.6 | -7.3 | -16.1 | 16.8 | 26.4 |
| 1999 | 6.3 | 12.9 | 4.1 | 2.8 | 11.8 | 7.1 | -5.9 | 2.7 | -1.6 | 7.7 | 8.7 | 0.4 |
| 1998 | -1.5 | -7.5 | 9.3 | 14.5 | 12.7 | 0.9 | -6.3 | -18.9 | -0.8 | 0.8 | 7.5 | -0.3 |
| 1997 | 4.1 | 7.1 | -11.8 | 18.5 | 5.0 | 11.2 | -15.5 | 7.5 | -9.4 | -1.5 | -2.3 | 3.5 |
| 1996 | · | · | · | · | · | · | · | · | · | · | · | 8.0 |
| Avg | -0.3 | 0.2 | 2.0 | 7.1 | 2.9 | 2.8 | -0.3 | -0.2 | -0.6 | -0.1 | 3.4 | 2.5 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
DGX seasonality — average by calendar month
Quest Diagnostics has monthly history back to 1996. Its strongest month by median is November — positive in 24 of 29 years, median +5.0%, and higher in 8 of the last 9. July is the soft spot, down in 17 of 30 with a median of -2.3%. Across its full record it has closed 59% of months higher, swings ±8.4% in an average month and has fallen 49.5% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | -0.3% | +0.2% | +2.0% | +7.1% | +2.9% | +2.8% | -0.3% | -0.2% | -0.5% | -0.1% | +3.4% | +2.5% |
| Win rate | 47%/30 | 43%/30 | 67%/30 | 67%/30 | 73%/30 | 67%/30 | 43%/30 | 57%/30 | 41%/29 | 52%/29 | 83%/29 | 70%/30 |
Win rate = share of positive months / sample size.
DGX risk & extremes
DGX 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 Quest Diagnostics's best month?+
Quest Diagnostics's strongest completed month on record is April 2000, at +46.38%.
What was Quest Diagnostics's worst month?+
Its weakest completed month on record is July 2002, at -29.82%.
Is Quest Diagnostics up this year?+
Quest Diagnostics is up 37.46% year to date, measured from its last close before 1 January.
What is Quest Diagnostics's 1-year return?+
+31.15% 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 Quest Diagnostics's biggest drawdown?+
The deepest peak-to-trough fall on record is 49.5%, measured on month-end closes since 1996.
Which calendar month is historically best for Quest Diagnostics?+
April has the highest average return across every completed April since 1996. An average is not a forecast.
About Quest Diagnostics
Quest Diagnostics is an S&P 500 company, a health care business worth about $26 billion. It profits from humanity's stubborn refusal to stay healthy — with price receipts on this site going back to 1996. And the long game: $100 at its first close here (1996) would be about $8,998 today.
Did you know?
- Its best month on record was April 2000 at +46.38%; its worst, July 2002 at -29.82%.
- It has closed November in the green 24 out of 29 times — past performance, future shrug.
Trivia for entertainment — the numbers come from our price data; the jokes don't.