How much did AVTX move each index today?
XBI: AVTX moved +4.66% and contributed +0.03 points against the index's −0.82-point move, offsetting 3% of it, ranking #133 of 147 members by contribution to the move.
AVTX closed the 2026-08-25 session at 19.74; that day's move sits in the 73th percentile of its own past year. The stock is 13.7% below its 52-week closing high and +8.7% for the year so far.
AVTX in the XBI beyond today
| window | AVTX return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +0.15% | +0.00 pts | +9.00 pts | #100 of 147 |
| 1 month | +1.23% | +0.00 pts | +18.53 pts | #111 of 147 |
| quarter to date | +6.82% | +0.15 pts | +10.87 pts | #43 of 147 |
| year to date | +8.70% | +0.38 pts | +47.19 pts | #48 of 147 |
Who moved with and against AVTX today?
On AVTX's side of the XBI tape: BHVN (+0.19 pts), ERAS (+0.12 pts), SMMT (+0.11 pts). Pulling the other way: MRNA (−0.36 pts), SYRE (−0.29 pts), RLAY (−0.10 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/AVTX, free to cite with attribution.