How much did ATO move each index today?
S&P 500: ATO moved +0.62% and contributed +0.0 points of the index's +46.2-point move (0% of it), ranking #216 of 491 members by contribution to the move.
XLU: ATO moved +0.62% and contributed +0.01 points of the index's +0.33-point move (2% of it), ranking #10 of 31 members by contribution to the move.
ATO closed the 2026-10-09 session at 161.66; that day's move sits in the 75th percentile of its own past year. The stock is 15.9% below its 52-week closing high and −2.5% for the year so far.
ATO in the S&P 500 beyond today
| window | ATO return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +2.86% | +0.1 pts | +88.8 pts | #216 of 503 |
| 1 month | −1.91% | −0.1 pts | +219.8 pts | #283 of 503 |
| quarter to date | +3.34% | +0.1 pts | +160.0 pts | #230 of 503 |
| year to date | −2.49% | −0.2 pts | +966.0 pts | #321 of 503 |
Who moved with and against ATO today?
On ATO'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/ATO, free to cite with attribution.