BIIB vs ZCMD: Correlation
Biogen (BIIB) and Zhongchao Inc. - Class A (ZCMD) show a negative relationship: their 3-year correlation of weekly returns is -0.20.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BIIB and ZCMD?
Over the past 3 years, BIIB and ZCMD moved with a correlation of -0.20, which is negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.14 lands near the 3-year figure. Over 5 years the correlation is -0.10, and the annualized covariance of weekly returns is -858.2 %².
Among the 32 assets we track against BIIB, ZCMD ranks #27 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months BIIB outperformed by 162.3 percentage points (+62.4% for BIIB against -99.9% for ZCMD). Risk is not evenly split, since ZCMD carries 4.7 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 ZCMD: side by side
| BIIB (Biogen) | ZCMD (Zhongchao Inc. - Class A) | |
|---|---|---|
| 1-year return | +62.4% | -99.9% |
| 5-year return | -35.7% | -100.0% |
| Volatility (ann.) | 30.1% | 141.8% |
| Beta vs S&P 500 | 0.53 | 0.59 |
| Max drawdown (3Y) | -57.7% | -100.0% |
| Market cap | $32.7B | – |
| P/E (trailing) | 39.2 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | BIIB | ZCMD |
|---|---|---|
| 2022 | +15.4% | -35.4% |
| 2023 | -6.6% | -69.5% |
| 2024 | -40.9% | -53.8% |
| 2025 | +15.1% | -72.2% |
| 2026 | +25.9% | -99.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BIIB and ZCMD good diversifiers for each other?
Yes. With a correlation of -0.20, BIIB and ZCMD have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BIIB and ZCMD?
As of 2026-08-27, the correlation of weekly returns between BIIB and ZCMD is -0.20 over 3 years, -0.14 over 1 year and -0.10 over 5 years.
Is ZCMD a good diversifier for BIIB?
Yes. With a correlation of -0.20, BIIB and ZCMD have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.20 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/biib-vs-zcmd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/biib-vs-zcmd/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BIIB correlations · ZCMD correlations
