BIIB Stock Chart (Dividends Reinvested, Inflation Adjusted)

All charts and data below are CPI-U inflation-adjusted and with dividends reinvested. (Why?)

BIIB: Total Real Return Chart (Dividends Reinvested, Inflation Adjusted)

BIIB real return snapshot: after CPI-U inflation, BIIB returned +42.08% over the past year and +8.05% YTD, with dividends reinvested. Since Sep. 17, 1991, BIIB is up +2,471.41% in real purchasing-power return, or +9.81%/yr, and is currently −70.95% below its real total-return high on Mar. 20, 2015.

Dividends Reinvested:

Tue 1991-09-17^💬 to Fri 2026-05-29	YTD Return	1 Year Return
BIIB ^×	+8.05% 2026-05-29	+42.08% 2026-05-29
Biogen Inc NASDAQ Common Stock

Returns

Tue 1991-09-17^💬 to Fri 2026-05-29	Overall Return	Exponential Trendline
BIIB ^×	+2,471.41% +9.81%/yr	+15.55%/yr (R²=0.729)
Biogen Inc NASDAQ Common Stock

Growth of $10,000

Tue 1991-09-17^💬 to Fri 2026-05-29	Start Value	End Value
BIIB ^×	$10,000.00 1991-09-17	$257,141.49 2026-05-29
Biogen Inc NASDAQ Common Stock

Annual Returns

Year	BIIB
2026 (YTD)	+8.05%
2025	+12.09%
2024	−42.56%
2023	−9.58%
2022	+8.41%
2021	−8.46%
2020	−18.59%
2019	−3.60%
2018	−7.31%
2017	+10.01%
2016	−9.31%
2015	−10.41%
2014	+20.51%
2013	+88.17%
2012	+30.74%
2011	+59.40%
2010	+23.48%
2009	+9.35%
2008	−16.40%
2007	+11.16%
2006	+5.97%
2005	−34.28%
2004	+75.78%
2003	+8.60%
2002	−53.00%
2001	+7.43%
2000	+86.61%
1999	+307.16%
1998	+34.56%
1997	+42.32%
1996	+17.88%
1995	+794.81%
1994	−64.00%
1993	−36.04%
1992	−34.59%
1991	−31.15%

Drawdowns

Tue 1991-09-17^💬 to Fri 2026-05-29	Current Drawdown	Worst Drawdown
BIIB ^×	−70.95% from 2015-03-20 peak	−90.83% 1994-12-16 from 1991-10-16 peak
Biogen Inc NASDAQ Common Stock

Rolling Returns

Period ending Fri 2026-05-29	1 Year	2 Years	3 Years	5 Years	10 Years
BIIB ^×	+42.08%	−14.05% −7.30%/yr	−40.27% −15.74%/yr	−40.99% −10.01%/yr	−50.18% −6.73%/yr
Biogen Inc NASDAQ Common Stock