What is the market doing?
What the tape says about BIIB
Biogen is +71% over the past year while the S&P 500 is +23%: 48 points ahead of the market.
+71%
1-year return · S&P 500 +23%
- vs 200-day average
- +19%
vs 200-day average · a clear uptrend
- RSI (14)
- 69
RSI (14) · neutral
- Below its 52-week high
- −0.17%
Below its 52-week high
Details›
- Last close2026-08-26
- $221.12
- 1 monthS&P 500 +3.7%
- +10%
- 1 yearS&P 500 +23%
- +71%
- 5 yearsS&P 500 +87%
- −32%
- vs 50-day average$203.24
- +8.8%
- 52-week high
- $221.50
- 52-week low
- $127.75
- Annualised volatility
- 32%
- Insider buying, net, 6 monthsForms 3/4/5 to 2026-06-30
- $585
| Year | Return |
|---|---|
| 2026 (year to date) | +26% |
| 2025 | +15% |
| 2024 | −41% |
| 2023 | −6.6% |
| 2022 | +15% |
| 2021 | −2.0% |
| 2020 | −17% |
| 2019 | −1.4% |
| 2018 | −5.5% |
| 2017 | +12% |
| Month | Years | Positive | Average |
|---|---|---|---|
| Jan | 10 | 5 of 10 | +1.5% |
| Feb | 10 | 3 of 10 | −2.5% |
| Mar | 10 | 3 of 10 | −3.8% |
| Apr | 10 | 2 of 10 | −1.5% |
| May | 10 | 6 of 10 | +0.73% |
| Jun | 10 | 6 of 10 | +3.1% |
| Jul | 11 | 8 of 11 | +3.5% |
| Aug | 11 | 7 of 11 | +1.6% |
| Sep | 10 | 4 of 10 | +2.3% |
| Oct | 10 | 3 of 10 | −1.5% |
| Nov | 10 | 6 of 10 | +1.9% |
| Dec | 10 | 3 of 10 | −1.9% |
End-of-day closes from IEX; the S&P 500 comparison uses SPY over the same window. Prices are a reference point, not a basis for trading decisions.
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