How much did ALT move each index today?
XBI: ALT moved +0.31% and contributed +0.00 points against the index's −0.71-point move, offsetting 0% of it, ranking #110 of 145 members by contribution to the move.
ALT closed the 2026-08-26 session at 3.15; that day's move sits in the 33th percentile of its own past year. The stock is 49.0% below its 52-week closing high and −12.7% for the year so far.
ALT in the XBI beyond today
| window | ALT return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +0.96% | +0.00 pts | −1.16 pts | #102 of 147 |
| 1 month | +5.35% | +0.02 pts | +18.61 pts | #97 of 147 |
| quarter to date | +3.62% | +0.08 pts | +10.14 pts | #60 of 147 |
| year to date | −12.74% | +0.05 pts | +46.46 pts | #107 of 147 |
Who moved with and against ALT today?
On ALT's side of the XBI tape: SLS (+0.19 pts), PURR (+0.16 pts), RVMD (+0.06 pts). Pulling the other way: MRNA (−0.24 pts), VERA (−0.07 pts), BHVN (−0.06 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/ALT, free to cite with attribution.