BIIB
Biogen Inc. Healthcare - Biotechnology Investor Relations →
Biogen Inc. (BIIB) closed at $201.18 as of 2026-02-02, trading 4.8% below its 200-week moving average of $211.25. This places BIIB in the below line zone. The stock moved further from the line this week, up from -14.9% last week. With a 14-week RSI of 72, BIIB is in overbought territory.
Over the past 1746 weeks of data, BIIB has crossed below its 200-week moving average 34 times. On average, these episodes lasted 22 weeks. Historically, investors who bought BIIB at the start of these episodes saw an average one-year return of +22.7%.
With a market cap of $29.5 billion, BIIB is a large-cap stock. The company generates a free cash flow yield of 7.2%, which is healthy. Return on equity stands at 9.3%. The stock trades at 1.6x book value.
Over the past 33.2 years, a hypothetical investment of $100 in BIIB would have grown to $17244, compared to $2849 for the S&P 500. That represents an annualized return of 16.8% vs 10.6% for the index — confirming BIIB as a market-beating investment and the kind of quality company where buying during 200-week moving average touches has historically been rewarded.
Free cash flow has been volatile over the past several years, making the quality of earnings harder to assess.
Growth of $100: BIIB vs S&P 500
Monthly data normalized to $100 at start. Vertical dashed lines mark 200-week MA touches.
What Happens After BIIB Crosses Below the Line?
Across 34 historical episodes, buying BIIB when it crossed below its 200-week moving average produced an average return of +16.6% after 12 months (median +5.0%), compared to +15.2% for the S&P 500 over the same periods. 59% of those episodes were profitable after one year. After 24 months, the average return was +55.8% vs +26.2% for the index.
Each line shows $100 invested at the moment BIIB crossed below its 200-week MA. Bold blue = stock average. Gray dashed = S&P 500 average over same periods.
Historical Touches
BIIB has crossed below its 200-week MA 34 times with an average 1-year return of +22.7% after recovery.
| Crossed Below | Recovered | Weeks | Max Depth | 1-Year Return | Return Since Touch |
|---|---|---|---|---|---|
| Aug 1992 | Aug 1995 | 154 | 70.6% | -29.6% | +17782.7% |
| Oct 1998 | Oct 1998 | 1 | 6.7% | +416.0% | +5860.9% |
| Jun 2002 | Jul 2002 | 5 | 13.5% | +14.3% | +472.7% |
| Sep 2002 | Oct 2002 | 4 | 9.9% | -5.6% | +402.6% |
| Nov 2002 | Feb 2004 | 66 | 34.1% | -11.4% | +398.5% |
| Feb 2005 | Dec 2005 | 41 | 29.2% | +21.2% | +436.1% |
| Feb 2006 | Feb 2006 | 1 | 0.2% | +11.8% | +354.4% |
| Apr 2006 | Apr 2006 | 1 | 0.3% | +5.3% | +354.3% |
| Jul 2006 | Oct 2006 | 12 | 9.0% | +29.3% | +365.3% |
| Oct 2006 | Oct 2006 | 2 | 2.5% | +78.2% | +347.0% |
| Feb 2007 | May 2007 | 12 | 7.3% | +33.7% | +360.8% |
| Jul 2008 | Aug 2008 | 2 | 2.8% | -4.9% | +302.3% |
| Aug 2008 | Feb 2009 | 23 | 21.0% | -2.0% | +295.0% |
| Feb 2009 | May 2009 | 13 | 12.1% | +19.5% | +337.0% |
| Jun 2009 | Dec 2009 | 26 | 18.7% | -1.0% | +301.8% |
| Apr 2010 | Jul 2010 | 13 | 12.6% | +89.6% | +282.5% |
| Feb 2016 | Apr 2016 | 11 | 7.2% | +0.3% | -23.8% |
| May 2016 | May 2016 | 3 | 4.6% | -0.6% | -23.7% |
| Jun 2016 | Jul 2016 | 6 | 17.7% | +5.6% | -18.3% |
| Oct 2016 | Nov 2016 | 3 | 5.1% | +16.3% | -30.8% |
| Dec 2016 | Aug 2017 | 38 | 17.8% | +13.2% | -30.1% |
| Oct 2017 | Oct 2017 | 1 | 0.7% | -2.5% | -34.6% |
| Nov 2017 | Nov 2017 | 1 | 0.4% | +3.6% | -34.9% |
| Feb 2018 | Jul 2018 | 20 | 17.0% | +14.0% | -31.1% |
| Oct 2018 | Oct 2018 | 1 | 2.9% | -4.0% | -33.0% |
| Dec 2018 | Dec 2018 | 2 | 8.6% | +7.3% | -28.3% |
| Mar 2019 | Oct 2019 | 31 | 27.9% | +28.6% | -7.2% |
| Nov 2019 | Nov 2019 | 1 | 1.6% | -11.9% | -28.7% |
| Jan 2020 | Feb 2020 | 3 | 6.8% | -3.4% | -29.5% |
| Mar 2020 | Mar 2020 | 1 | 3.9% | -4.2% | -27.8% |
| Jun 2020 | Jun 2021 | 52 | 16.5% | +42.0% | -28.0% |
| Sep 2021 | Oct 2022 | 55 | 30.8% | -6.0% | -29.1% |
| Mar 2023 | Mar 2023 | 2 | 3.4% | -13.0% | -21.6% |
| Jul 2023 | Ongoing | 133+ | 51.5% | Ongoing | -24.1% |
| Average | 22 | — | +22.7% | — |
Not financial advice. This is an educational tool. Past performance does not guarantee future results. Do your own research before making investment decisions.
Data as of Friday close, 2026-02-02