BMRA vs STLN: Correlation
How closely do Biomerica, Inc. (BMRA) and Starling Oncology, Inc. (STLN) trade together? Their weekly returns over three years give a correlation of 0.34, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BMRA and STLN?
Across a 3-year window, the weekly returns of BMRA and STLN correlate at 0.34, moderate. Recent behaviour matches the longer record: 0.40 over 1 year against 0.34 over 3. Stretching to 5 years gives 0.24, with an annualized covariance of 3859.3 %².
By 3-year correlation, STLN places #5 of the 10 assets tracked against BMRA. Their recent paths diverged sharply: over the last 12 months STLN outperformed by 116.5 percentage points (-33.3% for BMRA against +83.2% for STLN).
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.
BMRA vs STLN: side by side
| BMRA (Biomerica, Inc.) | STLN (Starling Oncology, Inc.) | |
|---|---|---|
| 1-year return | -33.3% | +83.2% |
| 5-year return | -94.0% | -36.1% |
| Volatility (ann.) | 97.9% | 116.5% |
| Beta vs S&P 500 | 1.49 | 1.39 |
| Max drawdown (3Y) | -88.7% | -94.8% |
| Market cap | – | $0.6B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BMRA | STLN |
|---|---|---|
| 2022 | -13.9% | -83.1% |
| 2023 | -62.7% | +23.6% |
| 2024 | -76.0% | -84.9% |
| 2025 | +5.0% | +1052.1% |
| 2026 | -16.7% | +78.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BMRA and STLN good diversifiers for each other?
Reasonably. At 0.34, BMRA and STLN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between BMRA and STLN?
As of 2026-08-27, the correlation of weekly returns between BMRA and STLN is 0.34 over 3 years, 0.40 over 1 year and 0.24 over 5 years.
Is STLN a good diversifier for BMRA?
Reasonably. At 0.34, BMRA and STLN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.34 mean?
A reading of 0.34 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/bmra-vs-stln.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bmra-vs-stln/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BMRA correlations · STLN correlations
