BJ vs MDAI: Correlation
How closely do BJ's Wholesale Club Holdings, Inc. (BJ) and Spectral AI, Inc. (MDAI) trade together? Their weekly returns over three years give a correlation of -0.24, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BJ and MDAI?
Across a 3-year window, the weekly returns of BJ and MDAI correlate at -0.24, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.25 lands near the 3-year figure. Stretching to 5 years gives -0.17, with an annualized covariance of -653.7 %².
Among the 43 assets we track against BJ, MDAI ranks #31 by 3-year correlation. The last year tells two different stories: BJ led by 15.5 percentage points, -6.9% for BJ against -22.4% for MDAI. Risk is not evenly split, since MDAI carries 4.0 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.
BJ vs MDAI: side by side
| BJ (BJ's Wholesale Club Holdings, Inc.) | MDAI (Spectral AI, Inc.) | |
|---|---|---|
| 1-year return | -6.9% | -22.4% |
| 5-year return | +59.5% | -83.2% |
| Volatility (ann.) | 26.4% | 105.0% |
| Beta vs S&P 500 | -0.14 | 1.03 |
| Max drawdown (3Y) | -30.1% | -93.5% |
| Market cap | $11.4B | $0.1B |
| P/E (trailing) | 20.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BJ | MDAI |
|---|---|---|
| 2022 | -1.2% | +3.0% |
| 2023 | +0.8% | -75.6% |
| 2024 | +34.0% | +15.0% |
| 2025 | +0.8% | -49.8% |
| 2026 | +0.5% | +14.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BJ and MDAI good diversifiers for each other?
Yes. With a correlation of -0.24, BJ and MDAI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BJ and MDAI?
Using weekly returns as of 2026-08-27: -0.24 over 3 years, with -0.25 over the last year and -0.17 over 5 years.
Is MDAI a good diversifier for BJ?
Yes. With a correlation of -0.24, BJ and MDAI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.24 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bj-vs-mdai.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/bj-vs-mdai/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BJ correlations · MDAI correlations
