IDYA vs RCUS: Correlation
Measured on weekly returns over the past three years, IDEAYA Biosciences, Inc. (IDYA) and Arcus Biosciences, Inc. (RCUS) carry a correlation of 0.58, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDYA and RCUS?
On 3 years of weekly data the IDYA/RCUS correlation comes out at 0.58, moderate. The relationship has been stable: the 1-year correlation (0.61) sits close to the 3-year figure. The 5-year figure is 0.39, and annualized covariance runs at 1546.9 %².
Within IDYA's tracked universe of 23 assets, RCUS comes in at #5 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months RCUS outperformed by 122.6 percentage points (+67.1% for IDYA against +189.7% for RCUS).
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.
IDYA vs RCUS: side by side
| IDYA (IDEAYA Biosciences, Inc.) | RCUS (Arcus Biosciences, Inc.) | |
|---|---|---|
| 1-year return | +67.1% | +189.7% |
| 5-year return | +82.5% | +3.1% |
| Volatility (ann.) | 45.3% | 59.0% |
| Beta vs S&P 500 | 1.37 | 1.71 |
| Max drawdown (3Y) | -69.2% | -69.5% |
| Market cap | $4.0B | $3.8B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IDYA | RCUS |
|---|---|---|
| 2022 | -23.1% | -48.9% |
| 2023 | +95.8% | -7.6% |
| 2024 | -27.8% | -22.0% |
| 2025 | +34.5% | +60.0% |
| 2026 | +20.8% | +28.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IDYA and RCUS good diversifiers for each other?
Only partially. A correlation of 0.58 means IDYA and RCUS share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between IDYA and RCUS?
Using weekly returns as of 2026-08-27: 0.58 over 3 years, with 0.61 over the last year and 0.39 over 5 years.
Is RCUS a good diversifier for IDYA?
Only partially. A correlation of 0.58 means IDYA and RCUS share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.58 mean?
A reading of 0.58 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/idya-vs-rcus.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/idya-vs-rcus/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IDYA correlations · RCUS correlations
