BIIB

Biogen
Biotechnology · Health Care · as of 2026-08-19
Last close
$221.56
+4.2% on the session
1-year return
+63.0%
+14.1% over six months
Volatility
35.4%
annualized, trailing year
Max drawdown
-14.3%
worst peak to trough, 1y
What the numbers say

Biogen is a biotechnology name in the health care sector. Over the past year it returned +63.0%, against +16.3% over three months and +9.1% over one. It trades 18.3% above its 200-day average, so the longer trend is confirming recent strength. Annualized volatility of 35.4% is above the market's typical range.

Its worst peak-to-trough decline over the year was -14.3%, and it has traded a median $200M a day — the figure that decides whether a position can actually be entered and exited at posted prices. Its daily moves correlate 0.09 with the S&P 500 proxy, so it has been moving substantially on its own.

Where it ranks
Within Health Care#10 of 59
Stronger than 84% of its sector on the momentum profile
Across the whole index#81 of 500

How BIIB scores on all four profiles

Its standing on steadiness, defensiveness and rebound — plus the factor-by-factor breakdown behind each score, and its closest and least-correlated peers among 7 others in Biotechnology.

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Full metrics
1 day+4.2%
1 week+6.1%
1 month+9.1%
3 months+16.3%
6 months+14.1%
1 year+63.0%
12-1 momentum+49.5%
Volatility (1y, annualized)35.4%
Max drawdown (1y)-14.3%
Distance vs 200-day average+18.3%
Return per unit of risk1.78
Median daily dollar volume$200M
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Everything on this page is computed from daily adjusted closing prices. It contains no earnings, balance-sheet, guidance or ownership data, and it is not a valuation. Nothing here is tailored to your circumstances or a recommendation to buy or sell. Past performance does not predict future results.