CGEM vs IDYA: Correlation
How closely do Cullinan Therapeutics, Inc. (CGEM) and IDEAYA Biosciences, Inc. (IDYA) trade together? Their weekly returns over three years give a correlation of 0.46, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CGEM and IDYA?
On 3 years of weekly data the CGEM/IDYA correlation comes out at 0.46, moderate. The relationship has been stable: the 1-year correlation (0.38) sits close to the 3-year figure. The 5-year figure is 0.38, and annualized covariance runs at 1514.3 %².
In CGEM's tracked universe of 13 assets, IDYA sits right near the top at #1. Correlation aside, the last 12 months split them widely, with CGEM ahead by 117.9 points (+185.0% versus +67.1%). One caveat on sizing: CGEM is 1.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
CGEM vs IDYA: side by side
| CGEM (Cullinan Therapeutics, Inc.) | IDYA (IDEAYA Biosciences, Inc.) | |
|---|---|---|
| 1-year return | +185.0% | +67.1% |
| 5-year return | -23.5% | +82.5% |
| Volatility (ann.) | 72.4% | 45.3% |
| Beta vs S&P 500 | 1.20 | 1.37 |
| Max drawdown (3Y) | -80.4% | -69.2% |
| Market cap | $1.4B | $4.0B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CGEM | IDYA |
|---|---|---|
| 2022 | -31.6% | -23.1% |
| 2023 | -3.4% | +95.8% |
| 2024 | +19.5% | -27.8% |
| 2025 | -15.0% | +34.5% |
| 2026 | +118.4% | +20.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CGEM and IDYA good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.46 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CGEM and IDYA?
The CGEM/IDYA correlation stands at 0.46 on a 3-year window (1 year: 0.38, 5 years: 0.38), computed from weekly returns as of 2026-08-27.
Is IDYA a good diversifier for CGEM?
Yes, to a useful degree: a correlation of 0.46 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.46 mean?
A reading of 0.46 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/cgem-vs-idya.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cgem-vs-idya/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CGEM correlations · IDYA correlations
