How much did ATO move each index today?
S&P 500: ATO moved +0.51% and contributed +0.0 points of the index's +5.5-point move (0% of it), ranking #207 of 503 members by contribution to the move.
XLU: ATO moved +0.51% and contributed +0.00 points of the index's +0.22-point move (2% of it), ranking #13 of 31 members by contribution to the move.
ATO closed the 2026-08-25 session at 167.56; that day's move sits in the 40th percentile of its own past year. The stock is 12.9% below its 52-week closing high and +1.1% for the year so far.
ATO in the S&P 500 beyond today
| window | ATO return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | −1.14% | −0.0 pts | −14.5 pts | #196 of 503 |
| 1 month | −5.42% | −0.2 pts | +264.1 pts | #386 of 503 |
| quarter to date | −2.73% | −0.1 pts | +177.9 pts | #351 of 503 |
| year to date | +1.07% | −0.1 pts | +831.8 pts | #353 of 503 |
Who moved with and against ATO today?
On ATO's side of the S&P 500 tape: AAPL (+3.5 pts), MSFT (+2.9 pts), AMD (+1.6 pts). Pulling the other way: LLY (−2.6 pts), NVDA (−2.4 pts), GOOGL (−2.4 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.