How much did REGN move each index today?
S&P 500: REGN moved +0.94% and contributed +0.1 points of the index's +46.2-point move (0% of it), ranking #129 of 491 members by contribution to the move.
NASDAQ 100: REGN moved +0.94% and contributed +0.4 points of the index's +157.3-point move (0% of it), ranking #40 of 100 members by contribution to the move.
XBI: REGN moved +0.94% and contributed +0.02 points of the index's +4.46-point move (0% of it), ranking #53 of 154 members by contribution to the move.
XLV: REGN moved +0.94% and contributed +0.02 points of the index's +2.66-point move (1% of it), ranking #25 of 59 members by contribution to the move.
REGN closed the 2026-10-09 session at 746.54; that day's move sits in the 70th percentile of its own past year. The stock is 12.4% below its 52-week closing high and −3.0% for the year so far.
REGN in the S&P 500 beyond today
| window | REGN return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +1.54% | +0.1 pts | +88.8 pts | #169 of 503 |
| 1 month | −5.89% | −0.6 pts | +219.8 pts | #441 of 503 |
| quarter to date | −1.55% | −0.1 pts | +160.0 pts | #454 of 503 |
| year to date | −3.02% | −0.1 pts | +966.0 pts | #302 of 503 |
Who moved with and against REGN today?
On REGN'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/REGN, free to cite with attribution.