US stock · data to 2026-10-20
Biogen (BIIB)
Biogen: $240.72 on 2026-10-20. +13.2% a year since 1991, worst fall -90%. Year-by-year returns, risk profile and what followed its price patterns in the past.
Open the interactive chart and full historyKey numbers
| Last close | $240.72 |
| Return a year since 1991 | +13.2% |
| All-time high | $475.98 (2015-03-20) |
| Below its high | -49.4% |
| Worst fall | -90% (1994-12-16) |
| Yearly volatility | 56% |
| Beta vs its index | 1.03 |
| Risk / reward vs its market | Medium risk · Low reward |
Returns by year
| Year | Return |
|---|---|
| 2026 | +36.8% |
| 2025 | +15.1% |
| 2024 | -40.9% |
| 2023 | -6.6% |
| 2022 | +15.4% |
| 2021 | -2.0% |
| 2020 | -17.5% |
| 2019 | -1.4% |
| 2018 | -5.5% |
| 2017 | +12.3% |
| 2016 | -7.4% |
| 2015 | -9.8% |
What followed its price patterns in the past
How often BIIB was higher 40 trading days after each pattern, next to an ordinary day. History for learning, not a forecast.
| Pattern | Past cases | Higher after 40 days | On an ordinary day | Median move |
|---|---|---|---|---|
| Big up day | 118 | 56% | 55% | +3.6% |
| Volume spike on an up day | 106 | 47% | 55% | -1.8% |
| Up streak | 101 | 49% | 55% | -1.4% |
| Volume spike on a down day | 96 | 49% | 55% | -1.1% |
| RSI rises above 70 | 94 | 53% | 55% | +2.6% |
| Down streak | 86 | 53% | 55% | +2.0% |
| New 52-week high | 85 | 61% | 55% | +3.4% |
| Crosses above 200-day avg | 78 | 59% | 55% | +3.5% |
| Big down day | 75 | 59% | 55% | +3.9% |
| Falls below 200-day avg | 75 | 60% | 55% | +4.6% |
| RSI drops below 30 | 64 | 48% | 55% | -1.0% |
| Squeeze breakout up | 55 | 53% | 55% | +1.0% |
ZOSH shows history and calculations for learning. It is not investment advice and does not tell anyone to buy or sell. Data: Yahoo Finance, AMFI, NSE and official sources; it can be late or wrong, so check before acting.