How much did STM move each index today?
SMH: STM moved −1.23% and contributed −0.08 points of the index's −3.94-point move (2% of it), ranking #15 of 24 members by contribution to the move.
STM closed the 2026-10-09 session at 52.06; that day's move sits in the 29th percentile of its own past year. The stock is 34.9% below its 52-week closing high and +101.5% for the year so far.
STM in the SMH beyond today
| window | STM return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | −9.08% | −0.58 pts | −27.27 pts | #16 of 25 |
| 1 month | +2.77% | −0.16 pts | +43.05 pts | #20 of 25 |
| quarter to date | −2.44% | −0.16 pts | −5.67 pts | #13 of 25 |
| year to date | +101.51% | +2.46 pts | +243.20 pts | #17 of 25 |
Who moved with and against STM today?
On STM's side of the SMH tape: AMD (−0.79 pts), NVDA (−0.69 pts), INTC (−0.67 pts). Pulling the other way: SNPS (+0.32 pts), ASML (+0.17 pts), CDNS (+0.15 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/STM, free to cite with attribution.