How much did IBRX move each index today?
XBI: IBRX moved +8.05% and contributed +0.11 points of the index's +4.95-point move (2% of it), ranking #7 of 147 members by contribution to the move.
IBRX closed the 2026-08-25 session at 8.19; that day's move sits in the 92th percentile of its own past year. The stock is 29.1% below its 52-week closing high and +313.6% for the year so far.
IBRX in the XBI beyond today
| window | IBRX return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +6.09% | +0.09 pts | +9.00 pts | #28 of 147 |
| 1 month | +17.17% | +0.22 pts | +18.53 pts | #32 of 147 |
| quarter to date | −6.45% | −0.28 pts | +10.87 pts | #137 of 147 |
| year to date | +313.64% | +1.16 pts | +47.19 pts | #12 of 147 |
Who moved with and against IBRX today?
On IBRX'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/IBRX, free to cite with attribution.