BIAF vs RDIB: Correlation
bioAffinity Technologies, Inc. (BIAF) and Reading International Inc - Class B Voting (RDIB) show a moderate relationship: their 3-year correlation of weekly returns is 0.48.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BIAF and RDIB?
Over the past 3 years, BIAF and RDIB moved with a correlation of 0.48, which is moderate. The link has tightened recently: the 1-year correlation (0.81) runs above the 3-year figure (0.48). Over 5 years the correlation is 0.45, and the annualized covariance of weekly returns is 27430.3 %².
Among the 24 assets we track against BIAF, RDIB ranks #11 by 3-year correlation. Correlation aside, the last 12 months split them widely, with RDIB ahead by 44.8 points (-32.0% versus +12.8%). Note the risk asymmetry: BIAF runs 8.3 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.
BIAF vs RDIB: side by side
| BIAF (bioAffinity Technologies, Inc.) | RDIB (Reading International Inc - Class B Voting) | |
|---|---|---|
| 1-year return | -32.0% | +12.8% |
| 5-year return | n/a | -35.9% |
| Volatility (ann.) | 691.4% | 83.4% |
| Beta vs S&P 500 | -2.10 | 0.58 |
| Max drawdown (3Y) | -99.6% | -72.8% |
| Market cap | – | $0.4B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BIAF | RDIB |
|---|---|---|
| 2022 | – | -14.5% |
| 2023 | -8.1% | -29.1% |
| 2024 | -38.1% | -39.6% |
| 2025 | -95.7% | +36.5% |
| 2026 | +328.8% | +32.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BIAF and RDIB good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BIAF and RDIB?
As of 2026-08-27, the correlation of weekly returns between BIAF and RDIB is 0.48 over 3 years, 0.81 over 1 year and 0.45 over 5 years.
Is RDIB a good diversifier for BIAF?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/biaf-vs-rdib.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/biaf-vs-rdib/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BIAF correlations · RDIB correlations
