BIIB vs GRX: Correlation
Biogen (BIIB) and The Gabelli Healthcare & Wellness Trust (GRX) show a moderate relationship: their 3-year correlation of weekly returns is 0.47.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BIIB and GRX?
Over the past 3 years, BIIB and GRX moved with a correlation of 0.47, which is moderate. Recent behaviour matches the longer record: 0.46 over 1 year against 0.47 over 3. Over 5 years the correlation is 0.32, and the annualized covariance of weekly returns is 211.6 %².
Among the 32 assets we track against BIIB, GRX ranks #10 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months BIIB outperformed by 48.1 percentage points (+62.4% for BIIB against +14.3% for GRX). Risk is not evenly split, since BIIB carries 2.0 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
BIIB vs GRX: side by side
| BIIB (Biogen) | GRX (The Gabelli Healthcare & Wellness Trust) | |
|---|---|---|
| 1-year return | +62.4% | +14.3% |
| 5-year return | -35.7% | +1.5% |
| Volatility (ann.) | 30.1% | 15.1% |
| Beta vs S&P 500 | 0.53 | 0.46 |
| Max drawdown (3Y) | -57.7% | -17.9% |
| Market cap | $32.7B | – |
| P/E (trailing) | 39.2 | 67.0 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | BIIB | GRX |
|---|---|---|
| 2022 | +15.4% | -20.0% |
| 2023 | -6.6% | -3.3% |
| 2024 | -40.9% | +9.6% |
| 2025 | +15.1% | +7.0% |
| 2026 | +25.9% | +8.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BIIB and GRX good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BIIB and GRX?
The BIIB/GRX correlation stands at 0.47 on a 3-year window (1 year: 0.46, 5 years: 0.32), computed from weekly returns as of 2026-08-27.
Is GRX a good diversifier for BIIB?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.47 mean?
A reading of 0.47 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: BIIB correlations · GRX correlations
