How much did MIRM move each index today?
XBI: MIRM moved +5.73% and contributed +0.09 points of the index's +4.46-point move (2% of it), ranking #14 of 154 members by contribution to the move.
MIRM closed the 2026-10-09 session at 86.01; that day's move sits in the 97th percentile of its own past year. The stock is 33.1% below its 52-week closing high and +8.9% for the year so far.
MIRM in the XBI beyond today
| window | MIRM return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +3.71% | +0.06 pts | −0.68 pts | #137 of 157 |
| 1 month | −14.51% | −0.23 pts | −3.07 pts | #23 of 157 |
| quarter to date | +0.62% | +0.02 pts | −3.93 pts | #132 of 157 |
| year to date | +8.89% | −0.43 pts | +31.82 pts | #145 of 157 |
Who moved with and against MIRM today?
On MIRM'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/MIRM, free to cite with attribution.