GILD vs BIIB: which was the better investment?
Gilead Sciences, Inc. against Biogen Inc. on real daily total-return data — every dividend reinvested, from Jan 22, 1992 to Jul 15, 2026.
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Frequently asked questions
Did GILD beat BIIB?
Yes — measured from Jan 22, 1992 to Jul 15, 2026 with dividends reinvested, GILD came out ahead: $3,000,502 versus $670,567 from a $10,000 start. That gap compounds from a 18.0% annual return against 13.0%.
What would $10,000 in GILD be worth today?
$10,000 invested in Gilead Sciences, Inc. (GILD) on Jan 22, 1992 would be worth about $3,000,502 as of Jul 15, 2026, a total return of 29905.0% (18.0% per year). The same $10,000 in BIIB would be worth $670,567.
Which was riskier — GILD or BIIB?
GILD swung with an annualized volatility of 46.3% and a worst peak-to-trough drop of -70.8%; BIIB ran at 55.4% volatility with a -87.3% maximum drawdown. Risk-adjusted (Sharpe ratio), that is 0.35 for GILD vs 0.20 for BIIB.
What data is this comparison based on?
Daily adjusted closing prices covering Jan 22, 1992 through Jul 15, 2026 — the full period where both assets have price history. Adjusted prices include dividends and splits, so these are total returns. The page refreshes with new market data every day.
Can I change the dates, amounts, or add monthly investing?
Yes — the interactive tool on this page is pre-loaded with GILD vs BIIB. You can set any start and end date, change the starting amount, add monthly contributions, or build a multi-asset portfolio and compare it against any benchmark.