How much did ZBIO move each index today?
XBI: ZBIO moved +6.70% and contributed +0.04 points of the index's +4.95-point move (1% of it), ranking #38 of 147 members by contribution to the move.
ZBIO closed the 2026-08-25 session at 33.77; that day's move sits in the 88th percentile of its own past year. The stock is 21.8% below its 52-week closing high and −7.0% for the year so far.
ZBIO in the XBI beyond today
| window | ZBIO return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +5.83% | +0.04 pts | +9.00 pts | #56 of 147 |
| 1 month | +2.89% | +0.01 pts | +18.53 pts | #104 of 147 |
| quarter to date | +33.06% | +0.19 pts | +10.87 pts | #36 of 147 |
| year to date | −7.00% | +0.18 pts | +47.19 pts | #78 of 147 |
Who moved with and against ZBIO today?
On ZBIO's side of the XBI tape: MRNA (+0.60 pts), TWST (+0.23 pts), BEAM (+0.13 pts). Pulling the other way: PTGX (−0.06 pts), SLS (−0.03 pts), PCVX (−0.03 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/ZBIO, free to cite with attribution.