Biogen Inc. drawdown: 54.4% below the all-time high
Biogen Inc. is 54.4% below its all-time high, set Mar 20, 2015 (as of market close, Sep 11, 2026). The chart shows every day as a percentage of the highest level reached up to that point: 100% means a fresh record, everything below is a drawdown.
- Below all-time high
- −54.4%
- 45.6% of ATH
- All-time high
- $475.98
- Mar 20, 2015
- Time below the high
- 11.5 yrs
- since Mar 20, 2015
- Worst-ever drawdown
- −90.0%
- Dec 16, 1994
- Longest underwater
- 11.5 yrs
- between all-time highs
- Today's level first reached
- Apr 29, 2013
- 13.4 yrs ago
- Last time this deep
- Jul 5, 2005
- in a previous episode
% of all-time high since 1991#
The classic underwater chart (drawdown curve), drawn as % of the all-time high — 100% is a fresh record, everything below it is time spent underwater. Basis and range are in the URL, so a particular view is a link.
The deepest drawdowns on record#
Every decline of 15% or more from an all-time high (price basis), deepest first.
| Peak | Trough | Depth | Peak → trough | Recovered by | Underwater |
|---|---|---|---|---|---|
| Oct 16, 1991 | Dec 16, 1994 | −90.0% | 3.2 yrs | Dec 26, 1995 | 4.2 yrs |
| Mar 20, 2015 | Apr 10, 2025 | −76.2% | 10.1 yrs | not yet | 11.5 yrs+ |
| Mar 6, 2000 | Apr 24, 2000 | −66.5% | 49 days | Sep 27, 2000 | 7 mo |
| Dec 18, 2000 | Mar 11, 2003 | −62.6% | 2.2 yrs | Oct 15, 2007 | 6.8 yrs |
| Oct 7, 1997 | Sep 1, 1998 | −62.0% | 11 mo | Dec 18, 1998 | 14 mo |
| Oct 15, 2007 | Dec 1, 2008 | −52.7% | 14 mo | Apr 15, 2011 | 3.5 yrs |
| May 20, 1996 | Jul 24, 1996 | −51.5% | 2 mo | Mar 11, 1997 | 10 mo |
| Mar 11, 1997 | Apr 17, 1997 | −46.1% | 37 days | Aug 29, 1997 | 6 mo |
Price basis (no dividends) — the convention crash histories use. With dividends reinvested, recoveries arrive years earlier; switch the basis on the chart above to see it.
Drawdown vs what came next#
One dot per month since 1991: how far Biogen Inc. stood below its all-time high, and the total return over the following 1, 5 and 10 years.
Read this with survivorship bias in mind: a single asset's history is one surviving sample, so past recoveries here say little about the odds ahead. Monthly windows also overlap heavily (they are not independent samples). Not investment advice.
FAQ#
- How far is Biogen Inc. from its all-time high?
- Biogen Inc. is currently 54.4% below its all-time high, set Mar 20, 2015 (as of market close, Sep 11, 2026). Prices only, the convention headlines use; with dividends reinvested the gap is usually smaller.
- What was the biggest Biogen Inc. drawdown ever?
- The deepest decline on record in our data (since 1991) took Biogen Inc. 90.0% below its prior high, bottoming Dec 16, 1994. The table on this page lists every major episode with its peak, trough and recovery date.
Methodology & related#
Daily data since -1 from BIIB; no free deep history exists for Biogen Inc. — for a 150-year drawdown record see the S&P 500 drawdown page. The price basis excludes dividends; the total-return basis reinvests them; the real basis additionally deflates by CPI. See also returns by year. Past performance does not predict future returns; not investment advice.