Biogen Stock (BIIB)
Compare Last 7 Days with Previous Period
Current Period Close
$220.83
Aug 28, 2026 - Sep 04, 2026
Previous Period Close
$221.50
Aug 20, 2026 - Aug 27, 2026
Net Comparison Delta
$-0.67 (-0.30%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(6 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Aug 28, 2026 | $218.50 | Aug 20, 2026 | $214.35 | +1.94% |
| Aug 31, 2026 | $216.65 | Aug 21, 2026 | $216.78 | -0.06% |
| Sep 01, 2026 | $216.04 | Aug 24, 2026 | $218.12 | -0.95% |
| Sep 02, 2026 | $222.67 | Aug 25, 2026 | $220.77 | +0.86% |
| Sep 03, 2026 | $224.51 | Aug 26, 2026 | $221.07 | +1.56% |
| Sep 04, 2026 | $220.83 | Aug 27, 2026 | $221.50 | -0.30% |