How much did WDC move each index today?
S&P 500: WDC moved +3.24% and contributed +0.6 points against the index's −1.0-point move, ranking #494 of 503 members by contribution to the move.
NASDAQ 100: WDC moved +3.24% and contributed +3.4 points against the index's −91.4-point move, offsetting 4% of it, ranking #98 of 102 members by contribution to the move.
XLK: WDC moved +3.24% and contributed +0.06 points of the index's +0.33-point move (18% of it), ranking #6 of 73 members by contribution to the move.
WDC closed the 2026-08-25 session at 450.75; that day's move sits in the 71th percentile of its own past year. The stock is 39.6% below its 52-week closing high and +161.9% for the year so far.
WDC in the S&P 500 beyond today
| window | WDC return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | −9.15% | −1.7 pts | −14.5 pts | #16 of 503 |
| 1 month | −9.47% | −1.6 pts | +264.1 pts | #487 of 503 |
| quarter to date | −29.43% | −5.8 pts | +177.9 pts | #487 of 503 |
| year to date | +161.86% | +10.3 pts | +831.8 pts | #22 of 503 |
Who moved with and against WDC today?
On WDC's side of the S&P 500 tape: AAPL (+5.0 pts), META (+3.3 pts), MSFT (+2.8 pts). Pulling the other way: NVDA (−6.4 pts), AVGO (−2.9 pts), GOOGL (−2.8 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/WDC, free to cite with attribution.