How much did SMMT move each index today?
XBI: SMMT moved +4.95% and contributed +0.07 points of the index's +4.95-point move (1% of it), ranking #16 of 147 members by contribution to the move.
SMMT closed the 2026-08-25 session at 13.36; that day's move sits in the 89th percentile of its own past year. The stock is 50.5% below its 52-week closing high and −23.6% for the year so far.
SMMT in the XBI beyond today
| window | SMMT return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +4.21% | +0.06 pts | +9.00 pts | #44 of 147 |
| 1 month | +1.95% | +0.02 pts | +18.53 pts | #98 of 147 |
| quarter to date | −8.30% | −0.16 pts | +10.87 pts | #131 of 147 |
| year to date | −23.61% | −0.30 pts | +47.19 pts | #136 of 147 |
Who moved with and against SMMT today?
On SMMT'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/SMMT, free to cite with attribution.