How much did WDC move each index today?
S&P 500: WDC moved +1.01% and contributed +0.2 points of the index's +46.2-point move (0% of it), ranking #84 of 491 members by contribution to the move.
NASDAQ 100: WDC moved +1.01% and contributed +0.8 points of the index's +157.3-point move (1% of it), ranking #30 of 100 members by contribution to the move.
XLK: WDC moved +1.01% and contributed +0.02 points of the index's +1.00-point move (2% of it), ranking #21 of 73 members by contribution to the move.
WDC closed the 2026-10-09 session at 397.28; that day's move sits in the 54th percentile of its own past year. The stock is 46.8% below its 52-week closing high and +130.8% for the year so far.
WDC in the S&P 500 beyond today
| window | WDC return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | −4.34% | −0.7 pts | +88.8 pts | #485 of 503 |
| 1 month | −13.81% | −2.8 pts | +219.8 pts | #496 of 503 |
| quarter to date | −12.58% | −2.4 pts | +160.0 pts | #498 of 503 |
| year to date | +130.79% | +8.8 pts | +966.0 pts | #35 of 503 |
Who moved with and against WDC today?
On WDC's side of the S&P 500 tape: MSFT (+11.3 pts), AMZN (+10.0 pts), PLTR (+2.8 pts). Pulling the other way: AAPL (−7.0 pts), NVDA (−3.7 pts), VZ (−2.7 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.