CLPR vs VRTX: Correlation
How closely do Clipper Realty Inc. (CLPR) and Vertex Pharmaceuticals (VRTX) trade together? Their weekly returns over three years give a correlation of -0.22, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CLPR and VRTX?
Across a 3-year window, the weekly returns of CLPR and VRTX correlate at -0.22, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at -0.01 versus -0.22 over 3 years. Stretching to 5 years gives -0.10, with an annualized covariance of -307.0 %².
Out of 12 assets tracked against CLPR, VRTX lands near the bottom at #11. The last year tells two different stories: VRTX led by 55.3 percentage points, -14.6% for CLPR against +40.7% for VRTX. Note the risk asymmetry: CLPR runs 1.5 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
CLPR vs VRTX: side by side
| CLPR (Clipper Realty Inc.) | VRTX (Vertex Pharmaceuticals) | |
|---|---|---|
| 1-year return | -14.6% | +40.7% |
| 5-year return | -40.2% | +174.5% |
| Volatility (ann.) | 45.5% | 30.3% |
| Beta vs S&P 500 | 0.61 | 0.55 |
| Max drawdown (3Y) | -52.3% | -29.1% |
| Market cap | $0.1B | $138.8B |
| P/E (trailing) | – | 31.9 |
| Dividend yield | 11.31% | 0.00% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | CLPR | VRTX |
|---|---|---|
| 2022 | -32.7% | +31.5% |
| 2023 | -9.5% | +40.9% |
| 2024 | -7.9% | -1.0% |
| 2025 | -8.0% | +12.6% |
| 2026 | -3.0% | +20.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CLPR and VRTX good diversifiers for each other?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
FAQ
What is the correlation between CLPR and VRTX?
Using weekly returns as of 2026-08-27: -0.22 over 3 years, with -0.01 over the last year and -0.10 over 5 years.
Is VRTX a good diversifier for CLPR?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
What does a correlation of -0.22 mean?
On the −1 to +1 scale, -0.22 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/clpr-vs-vrtx.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/clpr-vs-vrtx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CLPR correlations · VRTX correlations
