CSTL vs VCYT: Correlation
How closely do Castle Biosciences, Inc. (CSTL) and Veracyte, Inc. (VCYT) trade together? Their weekly returns over three years give a correlation of 0.48, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CSTL and VCYT?
On 3 years of weekly data the CSTL/VCYT correlation comes out at 0.48, moderate. The past 12 months show a weaker link (0.32) than the 3-year average (0.48). The 5-year figure is 0.48, and annualized covariance runs at 1658.6 %².
Within CSTL's tracked universe of 12 assets, VCYT comes in at #5 by 3-year correlation. Twelve-month performance is nearly a tie, at +53.8% for CSTL and +58.2% for VCYT.
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.
CSTL vs VCYT: side by side
| CSTL (Castle Biosciences, Inc.) | VCYT (Veracyte, Inc.) | |
|---|---|---|
| 1-year return | +53.8% | +58.2% |
| 5-year return | -54.0% | -7.1% |
| Volatility (ann.) | 64.2% | 53.3% |
| Beta vs S&P 500 | 0.79 | 1.37 |
| Max drawdown (3Y) | -57.8% | -50.1% |
| Market cap | $1.0B | $3.6B |
| P/E (trailing) | – | 31.6 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CSTL | VCYT |
|---|---|---|
| 2022 | -45.1% | -42.4% |
| 2023 | -8.3% | +15.9% |
| 2024 | +23.5% | +43.9% |
| 2025 | +46.0% | +6.3% |
| 2026 | -11.9% | +7.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CSTL and VCYT good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CSTL and VCYT?
The CSTL/VCYT correlation stands at 0.48 on a 3-year window (1 year: 0.32, 5 years: 0.48), computed from weekly returns as of 2026-08-27.
Is VCYT a good diversifier for CSTL?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.48 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/cstl-vs-vcyt.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cstl-vs-vcyt/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CSTL correlations · VCYT correlations
