How much did MRK move each index today?
S&P 500: MRK moved −2.33% and contributed −1.2 points against the index's +55.3-point move, offsetting 2% of it, ranking #495 of 501 members by contribution to the move.
DJIA: MRK moved −2.33% and contributed −21.2 points against the index's +105.1-point move, offsetting 20% of it, ranking #23 of 30 members by contribution to the move.
XLV: MRK moved −2.33% and contributed −0.24 points of the index's −1.94-point move (13% of it), ranking #3 of 59 members by contribution to the move.
MRK closed the 2026-08-27 session at 149.54; that day's move sits in the 6th percentile of its own past year. The stock is 4.4% below its 52-week closing high and +44.2% for the year so far.
MRK in the S&P 500 beyond today
| window | MRK return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +0.37% | −0.5 pts | +89.8 pts | #474 of 503 |
| 1 month | +14.71% | +4.8 pts | +414.8 pts | #18 of 503 |
| quarter to date | +16.37% | +5.3 pts | +231.6 pts | #15 of 503 |
| year to date | +44.17% | +10.3 pts | +885.5 pts | #24 of 503 |
Who moved with and against MRK today?
On MRK's side of the S&P 500 tape: AMZN (−5.5 pts), GE (−1.8 pts), LLY (−1.6 pts). Pulling the other way: NVDA (+56.4 pts), AVGO (+10.0 pts), MSFT (+8.8 pts).
Every member's contribution, top to bottom, is on the index dashboards; the day's story is in the market-close note. Machine-readable figures for this stock: /api/stock/MRK, free to cite with attribution.