BIIB
Biogen Inc. Healthcare - Biotechnology Investor Relations →
Biogen Inc. (BIIB) closed at $181.46 as of 2026-03-20, trading 13.9% below its 200-week moving average of $210.78. This places BIIB in the extreme value zone. The stock is currently moving closer to the line, down from -13.9% last week. The 14-week RSI sits at 54, indicating neutral momentum.
Over the past 14 weeks, up-weeks have carried more volume than down-weeks (1.52 buyers-vs-sellers ratio). When trading picks up, it's more often on days the price is rising — buyers are showing more interest than sellers.
Over the past 1752 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 $26.6 billion, BIIB is a large-cap stock. The company generates a free cash flow yield of 7.4%, which is healthy. Return on equity stands at 7.4%. The stock trades at 1.5x book value.
Over the past 33.2 years, a hypothetical investment of $100 in BIIB would have grown to $15554, compared to $2683 for the S&P 500. That represents an annualized return of 16.4% vs 10.4% for the index — confirming BIIB as a market-beating investment and the kind of quality company where buying during 200-week moving average touches has historically been rewarded.
Free cash flow has been growing at a 19.9% compound annual rate, with 4 consecutive years of positive cash generation. A business generating more cash every year while trading below its 200-week moving average is exactly the kind of disconnect value investors look for.
Business Health
Annual financials — how the underlying business has performed over the past several years.
Cash Flow Free cash flow & net income ($M)
Revenue Annual revenue ($M) — business growth proxy
Total Debt Balance sheet debt ($M)
ROIC Return on invested capital (%)
FCF Yield Free cash flow / market cap (%) — Yartseva signal
Gross Margin Pricing power & competitive moat (%)
Shares Outstanding Buybacks vs dilution (millions)
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% | +16029.8% |
| Oct 1998 | Oct 1998 | 1 | 6.7% | +416.0% | +5276.6% |
| Jun 2002 | Jul 2002 | 5 | 13.5% | +14.3% | +416.5% |
| Sep 2002 | Oct 2002 | 4 | 9.9% | -5.6% | +353.3% |
| Nov 2002 | Feb 2004 | 66 | 34.1% | -11.4% | +349.6% |
| Feb 2005 | Dec 2005 | 41 | 29.2% | +21.2% | +383.5% |
| Feb 2006 | Feb 2006 | 1 | 0.2% | +11.8% | +309.9% |
| Apr 2006 | Apr 2006 | 1 | 0.3% | +5.3% | +309.8% |
| Jul 2006 | Oct 2006 | 12 | 9.0% | +29.3% | +319.7% |
| Oct 2006 | Oct 2006 | 2 | 2.5% | +78.2% | +303.2% |
| Feb 2007 | May 2007 | 12 | 7.3% | +33.7% | +315.6% |
| Jul 2008 | Aug 2008 | 2 | 2.8% | -4.9% | +262.8% |
| Aug 2008 | Feb 2009 | 23 | 21.0% | -2.0% | +256.3% |
| Feb 2009 | May 2009 | 13 | 12.1% | +19.5% | +294.1% |
| Jun 2009 | Dec 2009 | 26 | 18.7% | -1.0% | +262.4% |
| Apr 2010 | Jul 2010 | 13 | 12.6% | +89.6% | +245.0% |
| Feb 2016 | Apr 2016 | 11 | 7.2% | +0.3% | -31.2% |
| May 2016 | May 2016 | 3 | 4.6% | -0.6% | -31.2% |
| Jun 2016 | Jul 2016 | 6 | 17.7% | +5.6% | -26.3% |
| Oct 2016 | Nov 2016 | 3 | 5.1% | +16.3% | -37.6% |
| Dec 2016 | Aug 2017 | 38 | 17.8% | +13.2% | -36.9% |
| Oct 2017 | Oct 2017 | 1 | 0.7% | -2.5% | -41.0% |
| Nov 2017 | Nov 2017 | 1 | 0.4% | +3.6% | -41.3% |
| Feb 2018 | Jul 2018 | 20 | 17.0% | +14.0% | -37.8% |
| Oct 2018 | Oct 2018 | 1 | 2.9% | -4.0% | -39.5% |
| Dec 2018 | Dec 2018 | 2 | 8.6% | +7.3% | -35.3% |
| Mar 2019 | Oct 2019 | 31 | 27.9% | +28.6% | -16.3% |
| Nov 2019 | Nov 2019 | 1 | 1.6% | -11.9% | -35.7% |
| Jan 2020 | Feb 2020 | 3 | 6.8% | -3.4% | -36.4% |
| Mar 2020 | Mar 2020 | 1 | 3.9% | -4.2% | -34.9% |
| Jun 2020 | Jun 2021 | 52 | 16.5% | +42.0% | -35.0% |
| Sep 2021 | Oct 2022 | 55 | 30.8% | -6.0% | -36.1% |
| Mar 2023 | Mar 2023 | 2 | 3.4% | -13.0% | -29.3% |
| Jul 2023 | Ongoing | 139+ | 51.5% | Ongoing | -31.6% |
| Average | 22 | — | +22.7% | — |
Frequently Asked Questions
Is BIIB below its 200-week moving average?
Yes. As of 2026-03-20, Biogen Inc. (BIIB) is trading 13.9% below its 200-week moving average of $210.78. The current price is $181.46.
What is BIIB's 200-week moving average price?
Biogen Inc.'s 200-week moving average is $210.78 as of 2026-03-20. This is the average weekly closing price over roughly the last 4 years, and it acts as a long-term trend line. When a stock drops below this level, it can signal that the price has fallen far enough from the long-term trend to attract value-oriented investors.
What happens when BIIB drops below its 200-week moving average?
BIIB has crossed below its 200-week moving average 34 times in our data. On average, buying at that moment produced a one-year return of +22.7%. These dips have historically been decent entry points. These episodes lasted 22 weeks on average.
Is BIIB a good value right now?
Here's what our data says about BIIB as of 2026-03-20: The stock is below its 200-week moving average, which is the starting point for our analysis. The 14-week RSI is 54. Free cash flow yield is 7.4%. Return on equity is 7.4%. Price-to-book is 1.5x. This is not a buy or sell recommendation — always do your own research.
How does BIIB compare to the S&P 500?
Over the past 33.2 years, $100 invested in BIIB would have grown to $15554, compared to $2683 for the S&P 500. That's 16.4% annualized vs 10.4% for the index. BIIB has outperformed the broader market over this period.
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 week of 2026-03-20