How much did CYTK move each index today?
XBI: CYTK moved +2.25% and contributed +0.03 points against the index's −0.71-point move, offsetting 4% of it, ranking #136 of 145 members by contribution to the move.
CYTK closed the 2026-08-26 session at 79.20; that day's move sits in the 79th percentile of its own past year. The stock is 9.2% below its 52-week closing high and +24.6% for the year so far.
CYTK in the XBI beyond today
| window | CYTK return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +1.88% | +0.02 pts | −1.16 pts | #114 of 147 |
| 1 month | −0.31% | −0.02 pts | +18.61 pts | #122 of 147 |
| quarter to date | −7.03% | −0.18 pts | +10.14 pts | #129 of 147 |
| year to date | +24.65% | +0.46 pts | +46.46 pts | #42 of 147 |
Who moved with and against CYTK today?
On CYTK's side of the XBI tape: ERAS (+0.11 pts), BHVN (+0.09 pts), SMMT (+0.07 pts). Pulling the other way: MRNA (−0.24 pts), SYRE (−0.24 pts), RLAY (−0.08 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/CYTK, free to cite with attribution.