ATRA vs BDTX: Correlation
How closely do Atara Biotherapeutics, Inc. (ATRA) and Black Diamond Therapeutics, Inc. (BDTX) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ATRA and BDTX?
Over the past 3 years, ATRA and BDTX moved with a correlation of 0.39, which is moderate. The relationship has been stable: the 1-year correlation (0.34) sits close to the 3-year figure. Over 5 years the correlation is 0.24, and the annualized covariance of weekly returns is 4997.4 %².
Few assets follow ATRA as closely as BDTX, which ranks #3 of 13 tracked partners. Neither side won the trailing year by much: -25.1% against -20.9%. Risk is not evenly split, since ATRA carries 1.8 times the volatility of the other side.
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.
ATRA vs BDTX: side by side
| ATRA (Atara Biotherapeutics, Inc.) | BDTX (Black Diamond Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | -25.1% | -20.9% |
| 5-year return | -97.5% | -77.0% |
| Volatility (ann.) | 153.2% | 83.4% |
| Beta vs S&P 500 | 1.17 | 2.26 |
| Max drawdown (3Y) | -90.7% | -83.1% |
| Market cap | $0.1B | $0.1B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ATRA | BDTX |
|---|---|---|
| 2022 | -79.2% | -66.2% |
| 2023 | -84.4% | +56.1% |
| 2024 | +3.8% | -23.8% |
| 2025 | +35.9% | +13.6% |
| 2026 | -48.9% | -6.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ATRA and BDTX good diversifiers for each other?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ATRA and BDTX?
Using weekly returns as of 2026-08-27: 0.39 over 3 years, with 0.34 over the last year and 0.24 over 5 years.
Is BDTX a good diversifier for ATRA?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.39 mean?
A reading of 0.39 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/atra-vs-bdtx.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/atra-vs-bdtx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ATRA correlations · BDTX correlations
