How much did MCK move each index today?
S&P 500: MCK moved −1.17% and contributed −0.1 points of the index's −12.3-point move (1% of it), ranking #43 of 503 members by contribution to the move.
XLV: MCK moved −1.17% and contributed −0.03 points of the index's −1.56-point move (2% of it), ranking #9 of 59 members by contribution to the move.
MCK closed the 2026-08-25 session at 905.18; that day's move sits in the 98th percentile of its own past year. The stock is 9.1% below its 52-week closing high and +10.6% for the year so far.
MCK in the S&P 500 beyond today
| window | MCK return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +4.13% | +0.5 pts | −14.5 pts | #457 of 503 |
| 1 month | +6.48% | +0.8 pts | +264.1 pts | #82 of 503 |
| quarter to date | +19.80% | +2.0 pts | +177.9 pts | #55 of 503 |
| year to date | +10.56% | +0.8 pts | +831.8 pts | #154 of 503 |
Who moved with and against MCK today?
On MCK's side of the S&P 500 tape: NVDA (−9.1 pts), GOOGL (−4.5 pts), LLY (−3.9 pts). Pulling the other way: AAPL (+5.5 pts), MSFT (+2.3 pts), META (+1.8 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/MCK, free to cite with attribution.