How much did PRME move each index today?
XBI: PRME moved +11.45% and contributed +0.02 points of the index's +4.46-point move (1% of it), ranking #52 of 154 members by contribution to the move.
PRME closed the 2026-10-09 session at 3.99; that day's move sits in the 96th percentile of its own past year. The stock is 38.1% below its 52-week closing high and +15.0% for the year so far.
PRME in the XBI beyond today
| window | PRME return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +33.89% | +0.06 pts | −0.68 pts | #135 of 157 |
| 1 month | +19.10% | +0.04 pts | −3.07 pts | #124 of 157 |
| quarter to date | +30.61% | +0.05 pts | −3.93 pts | #143 of 157 |
| year to date | +14.99% | +0.12 pts | +31.82 pts | #60 of 157 |
Who moved with and against PRME today?
On PRME's side of the XBI tape: MRNA (+0.45 pts), IOVA (+0.23 pts), PCVX (+0.19 pts). Pulling the other way: PRAX (−0.03 pts), MDGL (−0.02 pts), PURR (−0.02 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/PRME, free to cite with attribution.