CERS vs RVT: Correlation
How closely do Cerus Corporation (CERS) and Royce Small-Cap Trust, Inc. (RVT) trade together? Their weekly returns over three years give a correlation of 0.55, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CERS and RVT?
Across a 3-year window, the weekly returns of CERS and RVT correlate at 0.55, moderate. The past 12 months show a weaker link (0.41) than the 3-year average (0.55). Stretching to 5 years gives 0.51, with an annualized covariance of 750.7 %².
Within CERS's tracked universe of 10 assets, RVT comes in at #4 by 3-year correlation. Correlation aside, the last 12 months split them widely, with CERS ahead by 80.2 points (+107.6% versus +27.4%). Note the risk asymmetry: CERS runs 3.7 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.
CERS vs RVT: side by side
| CERS (Cerus Corporation) | RVT (Royce Small-Cap Trust, Inc.) | |
|---|---|---|
| 1-year return | +107.6% | +27.4% |
| 5-year return | -57.3% | +53.9% |
| Volatility (ann.) | 71.0% | 19.1% |
| Beta vs S&P 500 | 2.01 | 0.99 |
| Max drawdown (3Y) | -52.1% | -23.5% |
| Market cap | $0.5B | $2.3B |
| P/E (trailing) | – | 6.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CERS | RVT |
|---|---|---|
| 2022 | -46.4% | -26.3% |
| 2023 | -40.8% | +18.8% |
| 2024 | -28.7% | +17.9% |
| 2025 | +33.8% | +11.5% |
| 2026 | +32.0% | +21.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CERS and RVT good diversifiers for each other?
To a limited degree. At 0.55 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CERS and RVT?
The CERS/RVT correlation stands at 0.55 on a 3-year window (1 year: 0.41, 5 years: 0.51), computed from weekly returns as of 2026-08-27.
Is RVT a good diversifier for CERS?
To a limited degree. At 0.55 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.55 mean?
A reading of 0.55 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cers-vs-rvt.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cers-vs-rvt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CERS correlations · RVT correlations
