BIIB trailing returns
Biogen Inc.'s 10-year annualized return is -3.5% per year (-29.7% cumulative). How Biogen Inc. (BIIB) has performed over the last day, week, month and year, over 5, 10 and 20 years, and since inception, through July 24, 2026 — cumulative and annualized, with dividends on or off.
Trailing returns by period#
To 2026-07-24. Annualized (CAGR) for windows of a year or more.
| Period | Path | Annualized | Cumulative |
|---|---|---|---|
| 1 day | — | +0.8% | |
| 1 week | — | -1.8% | |
| 1 month | — | +1.3% | |
| YTD | — | +14.9% | |
| 1 year | +54.4% | +54.4% | |
| 5 years | -9.1% | -37.9% | |
| 10 years | -3.5% | -29.7% | |
| 20 years | +8.3% | +390.8% | |
| Since inception (1991) | +12.7% | +6370.1% |
Growth of BIIB#
Actual index level (solid); dashed lines are each window's constant-rate path from start to today.
Methodology#
Trailing returns measure from the closest close about N years before the latest close (2026-07-24). Cumulative return is the total change over the window; annualized return is the compound annual growth rate (CAGR), shown for windows of a year or more. Total return reinvests dividends (from BIIB's split- and dividend-adjusted closes); price return excludes them. See the year-by-year returns for the calendar breakdown. Past performance does not predict future returns; not investment advice.
See also: S&P 500 · Nasdaq-100 · Dow Jones · Russell 2000 · US Bond Market · Gold · Silver · Bitcoin · Ethereum
FAQ
- What is Biogen Inc.'s 10-year return?
- Over the last 10 years, Biogen Inc. (BIIB) returned about -3.5% a year annualized (-29.7% cumulative total return).
- What is Biogen Inc.'s 20-year annualized return?
- Over the last 20 years, Biogen Inc. (BIIB) compounded at about +8.3% a year (+390.8% cumulative).
- What is Biogen Inc.'s return since inception?
- Since 1991, Biogen Inc. (BIIB) has compounded at about +12.7% a year — +6370.1% in total.