How much did BSX move each index today?
S&P 500: BSX moved −3.13% and contributed −0.3 points against the index's +55.3-point move, offsetting 1% of it, ranking #456 of 501 members by contribution to the move.
XLV: BSX moved −3.13% and contributed −0.06 points of the index's −1.94-point move (3% of it), ranking #10 of 59 members by contribution to the move.
BSX closed the 2026-08-27 session at 46.66; that day's move sits in the 5th percentile of its own past year. The stock is 56.9% below its 52-week closing high and −51.1% for the year so far.
BSX in the S&P 500 beyond today
| window | BSX return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | −5.49% | −0.7 pts | +89.8 pts | #482 of 503 |
| 1 month | +1.35% | +0.0 pts | +414.8 pts | #268 of 503 |
| quarter to date | +9.33% | +0.4 pts | +231.6 pts | #167 of 503 |
| year to date | −51.06% | −8.6 pts | +885.5 pts | #499 of 503 |
Who moved with and against BSX today?
On BSX's side of the S&P 500 tape: AMZN (−5.5 pts), GE (−1.8 pts), LLY (−1.6 pts). Pulling the other way: NVDA (+56.4 pts), AVGO (+10.0 pts), MSFT (+8.8 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/BSX, free to cite with attribution.