BIIB
StockBiogen Inc.
This is the kind of decline worth waking up for.
Biogen Inc. is 58.2% off its high — among the deepest declines in its recorded history.
Very Large
Current Drawdown
-58.2%
Days in Drawdown
4127
Avg Max Drawdown
10.6%
Avg Length
83
Drawdown Severity Score™
9.2
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.
Valuation vs Its Own History
Data as of July 8, 2026 · updated daily
Where today's valuation sits within BIIB's own multi-year range. A lower percentile means today's ratio is lower than more of its past readings. This is context, not a recommendation.
Price to Sales
20 years of daily history
Price to Sales history
EV to EBITDA
20 years of daily history
EV to EBITDA history · log scale
Biogen Inc. (BIIB) Analysis: Current Drawdown Insights
Biogen Inc. is currently in a drawdown that is unusual by its own historical standards. As of 2026-07-09, the stock is trading at $198.91, which represents a 58.2% decline from its all-time high of $475.98. This drawdown has persisted for 4127 days.
Based on its full tracked price history, 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 its tracked history. The largest drawdown on record for Biogen Inc. was 90.0%, beginning in 1991. The longest drawdown duration on record was 2491 days.
The Drawdown Severity Score™ for Biogen Inc. currently stands at 9.18. 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 in its tracked history.
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 is rare by that stock's own historical standards.
📜 Historical Drawdown Events
Current drawdown shown in blue. Showing the most recent and the deepest of 101 tracked pullbacks (68 listed).
| Start Date | End Date | Duration | Max Depth | Start Price | Lowest Price | Recovery Price |
|---|---|---|---|---|---|---|
| 2015-03-22 | Ongoing | 4127 days | -58.2% | $475.98 | $198.91 | n/a |
| 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 |
| 2011-06-30 | 2011-10-24 | 117 days | -22.0% | $108.98 | $85.03 | $109.52 |
| 2007-10-16 | 2011-04-15 | 1278 days | -52.7% | $82.51 | $39.02 | $82.96 |
| 2000-12-19 | 2007-10-15 | 2491 days | -62.6% | $75.08 | $28.09 | $82.51 |
| 2000-11-09 | 2000-12-18 | 40 days | -30.8% | $73.42 | $50.81 | $75.08 |
| 2000-03-07 | 2000-09-27 | 204 days | -66.5% | $57.10 | $19.13 | $57.31 |
| 2000-01-24 | 2000-03-03 | 40 days | -30.2% | $49.25 | $34.38 | $50.00 |
| 1999-11-29 | 1999-12-21 | 23 days | -18.3% | $23.17 | $18.92 | $24.06 |
| 1999-08-24 | 1999-11-26 | 95 days | -35.1% | $22.85 | $14.82 | $23.17 |
| 1999-05-14 | 1999-06-16 | 34 days | -16.2% | $10.03 | $8.41 | $10.59 |
| 1999-04-13 | 1999-05-07 | 25 days | -25.7% | $9.58 | $7.13 | $9.83 |
| 1999-03-12 | 1999-04-05 | 24 days | -14.5% | $9.17 | $7.83 | $9.19 |
| 1999-02-02 | 1999-03-05 | 32 days | -19.4% | $8.50 | $6.85 | $8.58 |
| 1997-10-08 | 1998-12-18 | 437 days | -62.0% | $7.67 | $2.92 | $8.02 |
| 1997-03-12 | 1997-08-29 | 170 days | -46.1% | $5.02 | $2.71 | $5.06 |
| 1996-05-21 | 1997-03-11 | 295 days | -51.5% | $5.02 | $2.44 | $5.02 |
| 1995-12-27 | 1996-04-01 | 97 days | -27.8% | $3.85 | $2.78 | $4.06 |
| 1991-10-17 | 1995-12-26 | 1532 days | -90.0% | $3.54 | $0.35 | $3.85 |
| 1991-09-30 | 1991-10-16 | 17 days | -24.4% | $3.33 | $2.52 | $3.54 |
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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Or explore current drawdowns:
Biogen Inc. (BIIB) is trading at $198.91 as of Jul 9, 2026. It is 58.2% below its high of $475.98. The drawdown has lasted 4,127 days. Severity score: 9.2 (Very Large).
BIIB Price History and Drawdown Data
Latest price
$198.91
High-water mark
$475.98
Current drawdown
-58.2%
Days in drawdown
4,127
This BIIB page is built around daily price history, the latest high-water mark, current drawdown depth, drawdown duration, and comparable historical drawdown events. The chart above provides the price-history context, while the sections below explain how the current move compares with prior Biogen Inc. drawdowns.
What History Says About BIIB
Biogen Inc. has dropped 30%+ from its high 10 times in its tracked history. These events lasted an average of 658 days with an average max drop of -52.7%.
The current drawdown of -58.2% has lasted 4,127 days, which is 6.3x the average duration of comparable events.
| Period | Max Drop | Duration |
|---|---|---|
| Oct 1991 to Dec 1995 | -90.0% | 1532 days |
| Mar 2000 to Sep 2000 | -66.5% | 204 days |
| Dec 2000 to Oct 2007 | -62.6% | 2491 days |
| Oct 1997 to Dec 1998 | -62.0% | 437 days |
| Oct 2007 to Apr 2011 | -52.7% | 1278 days |
| May 1996 to Mar 1997 | -51.5% | 295 days |
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