Biogen Inc. (BIIB) is trading at $172.97, which is -63.7% below its all-time high of $475.98. The Drawdown Severity Score is 10.0, placing it in the red (severe) zone. Over its tracked history, BIIB has experienced 101 significant drawdown events with an average maximum drawdown of -10.6%.
Data last updated: April 10, 2026 at 04:25 PM EDT
BIIB
StockBiogen Inc.
Price
$172.97
as of Apr 10, 2026
All Time High: $475.98
Extreme
Current Drawdown
-63.7%
Days in Drawdown
3996
Avg Max Drawdown
10.6%
Avg Length
83
Drawdown Severity Score™
10.0
BIIB - Price & High Water Mark
BIIB - Drawdown Timeline
How to read this chart: Negative values indicate drawdowns from all-time highs. Values closer to 0% mean the stock is near its high water mark.
Biogen Inc. (BIIB) Analysis: Current Drawdown Insights
Biogen Inc. is currently experiencing an unusual drawdown opportunity. As of 2026-04-10, the stock is trading at $172.97, which represents a 63.7% decline from its all-time high of $475.98. This drawdown has persisted for 3996 days.
Based on comprehensive historical analysis spanning 14 years, Biogen Inc. typically experiences drawdowns averaging 10.6% in depth, with an average duration of 83 days. Biogen Inc. has gone through 101 total drawdown events in the last 14 years. The largest drawdown for Biogen Inc. in the last 14 years was 22.1%. The longest drawdown duration in its history was 275 days.
The Drawdown Severity Score™ for Biogen Inc. currently stands at 10.03. This is our proprietary indicator that shows the relative severity of the current drawdown based on the asset's unique historical patterns. A score between 8.0 and 12.0 indicates an extremely rare, severe drawdown—the asset almost never experiences declines of this magnitude. This often represents a possibly exceptional opportunity for long-term investors with strong conviction.
Understanding Drawdowns: A drawdown measures how far a stock has fallen from its peak price. Every stock experiences drawdowns—periods when the price declines from all-time highs before recovering. By analyzing Biogen Inc.'s historical drawdown patterns, investors can identify when the stock is experiencing a typical market fluctuation versus an unusual decline that may represent a buying opportunity.
📜 Historical Drawdown Events
Current drawdown shown in blue. Complete record of all 101 historical pullbacks below.
| Start Date | End Date | Duration | Max Depth | Start Price | Lowest Price | Recovery Price |
|---|---|---|---|---|---|---|
| 2015-05-02 | Ongoing | 3996 days | -63.7% | $475.98 | $172.97 | — |
| 2015-03-06 | 2015-03-17 | 11 days | -4.2% | $425.61 | $407.64 | $426.12 |
| 2015-03-03 | 2015-03-05 | 3 days | -0.7% | $415.79 | $412.79 | $425.61 |
| 2015-02-27 | 2015-03-02 | 4 days | -0.1% | $410.10 | $409.59 | $415.79 |
| 2015-02-24 | 2015-02-25 | 2 days | -0.9% | $408.58 | $404.89 | $408.94 |
| 2015-02-09 | 2015-02-19 | 11 days | -3.0% | $402.00 | $390.00 | $406.73 |
| 2015-02-04 | 2015-02-05 | 2 days | -0.7% | $393.89 | $391.12 | $401.79 |
| 2015-01-21 | 2015-01-30 | 10 days | -3.3% | $363.28 | $351.18 | $389.16 |
| 2014-12-22 | 2015-01-20 | 30 days | -7.2% | $360.67 | $334.65 | $363.28 |
| 2014-03-19 | 2014-12-18 | 275 days | -22.1% | $351.94 | $274.00 | $353.70 |
| 2014-02-24 | 2014-03-18 | 22 days | -5.3% | $347.11 | $328.75 | $351.94 |
| 2014-02-19 | 2014-02-20 | 2 days | -1.9% | $334.98 | $328.45 | $335.11 |
| 2014-02-14 | 2014-02-18 | 5 days | -0.1% | $328.62 | $328.29 | $334.98 |
| 2014-01-31 | 2014-02-11 | 12 days | -5.8% | $318.28 | $299.93 | $319.82 |
| 2014-01-24 | 2014-01-30 | 7 days | -5.4% | $314.96 | $297.88 | $318.28 |
| 2014-01-13 | 2014-01-21 | 9 days | -5.2% | $299.31 | $283.67 | $310.50 |
| 2013-11-26 | 2014-01-10 | 46 days | -8.2% | $295.88 | $271.51 | $299.31 |
| 2013-10-29 | 2013-11-22 | 25 days | -9.1% | $254.43 | $231.19 | $285.62 |
| 2013-10-24 | 2013-10-25 | 2 days | -0.8% | $251.12 | $249.22 | $252.26 |
| 2013-09-23 | 2013-10-22 | 30 days | -9.8% | $248.13 | $223.85 | $250.60 |
| 2013-05-29 | 2013-09-18 | 113 days | -17.4% | $240.86 | $199.07 | $246.35 |
| 2013-05-23 | 2013-05-24 | 2 days | -0.2% | $233.07 | $232.62 | $235.24 |
| 2013-05-15 | 2013-05-21 | 7 days | -2.0% | $229.84 | $225.18 | $231.33 |
| 2013-04-30 | 2013-05-14 | 15 days | -6.4% | $223.61 | $209.28 | $229.84 |
| 2013-04-26 | 2013-04-29 | 4 days | -1.1% | $216.00 | $213.59 | $223.61 |
| 2013-04-23 | 2013-04-25 | 3 days | -4.2% | $215.20 | $206.18 | $216.00 |
| 2013-04-15 | 2013-04-22 | 8 days | -4.0% | $207.01 | $198.66 | $215.20 |
| 2013-04-03 | 2013-04-10 | 8 days | -2.5% | $198.19 | $193.17 | $198.34 |
| 2013-03-21 | 2013-03-27 | 7 days | -1.1% | $178.10 | $176.22 | $182.68 |
| 2013-03-18 | 2013-03-20 | 3 days | -0.7% | $176.78 | $175.52 | $178.10 |
| 2013-03-07 | 2013-03-11 | 4 days | -0.6% | $172.45 | $171.47 | $174.14 |
| 2013-02-19 | 2013-03-04 | 14 days | -4.4% | $168.74 | $161.36 | $169.96 |
| 2013-02-14 | 2013-02-15 | 2 days | -0.8% | $165.91 | $164.59 | $168.74 |
| 2013-02-11 | 2013-02-12 | 2 days | -0.3% | $164.44 | $163.96 | $165.45 |
| 2013-02-07 | 2013-02-08 | 2 days | -0.4% | $160.98 | $160.30 | $164.44 |
| 2013-02-04 | 2013-02-05 | 2 days | -1.0% | $157.30 | $155.73 | $157.36 |
| 2012-09-21 | 2013-01-31 | 133 days | -13.1% | $156.06 | $135.61 | $156.08 |
| 2012-09-19 | 2012-09-20 | 2 days | -0.5% | $155.80 | $155.04 | $156.06 |
| 2012-09-10 | 2012-09-13 | 4 days | -0.6% | $152.50 | $151.60 | $152.50 |
| 2012-07-30 | 2012-09-06 | 39 days | -4.3% | $149.47 | $143.09 | $152.19 |
| 2012-07-18 | 2012-07-26 | 9 days | -4.6% | $145.91 | $139.23 | $147.75 |
| 2012-07-05 | 2012-07-17 | 13 days | -2.5% | $145.63 | $142.00 | $145.91 |
| 2012-06-28 | 2012-06-29 | 2 days | -2.1% | $143.16 | $140.11 | $144.38 |
| 2012-06-20 | 2012-06-27 | 8 days | -2.7% | $143.09 | $139.20 | $143.16 |
| 2012-05-16 | 2012-06-14 | 30 days | -7.5% | $137.04 | $126.73 | $138.66 |
| 2012-05-03 | 2012-05-11 | 9 days | -3.1% | $135.16 | $130.97 | $136.71 |
| 2012-05-01 | 2012-05-02 | 2 days | -1.6% | $134.01 | $131.83 | $135.16 |
| 2012-04-04 | 2012-04-25 | 22 days | -2.9% | $128.80 | $125.02 | $129.29 |
| 2012-03-30 | 2012-04-02 | 4 days | -0.4% | $126.48 | $126.00 | $127.63 |
| 2012-03-28 | 2012-03-29 | 2 days | -0.4% | $126.23 | $125.69 | $126.48 |
| 2012-03-14 | 2012-03-26 | 13 days | -2.4% | $122.18 | $119.28 | $125.80 |
How to read: Each row shows a complete drawdown from peak to recovery. Red rows = most severe drawdowns (worst 20% or 5x+ average), yellow rows = moderate (2x-5x worse than average).
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What History Says About BIIB
Biogen Inc. has dropped 10%+ from its high 3 times in its tracked history. These events lasted an average of 174 days with an average max drop of -17.5%.
The current drawdown of -63.7% has lasted 3,996 days, which is 23.0x the average duration of comparable events.
| Period | Max Drop | Duration |
|---|---|---|
| Mar 2014 to Dec 2014 | -22.1% | 275 days |
| May 2013 to Sep 2013 | -17.4% | 113 days |
| Sep 2012 to Jan 2013 | -13.1% | 133 days |
Learn More About Drawdowns
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Understanding Severity Scores
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The Drawdown Severity Score
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