MBBC vs POLA: Correlation
Measured on weekly returns over the past three years, Marathon Bancorp, Inc. (MBBC) and Polar Power, Inc. (POLA) carry a correlation of -0.25, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MBBC and POLA?
On 3 years of weekly data the MBBC/POLA correlation comes out at -0.25, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.22 lands near the 3-year figure. The 5-year figure is -0.17, and annualized covariance runs at -597.8 %².
POLA is close to the least connected end of MBBC's tracked universe, ranking #12 of 13. Their recent paths diverged sharply: over the last 12 months MBBC outperformed by 78.7 percentage points (+48.3% for MBBC against -30.4% for POLA). Risk is not evenly split, since POLA carries 2.5 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.
MBBC vs POLA: side by side
| MBBC (Marathon Bancorp, Inc.) | POLA (Polar Power, Inc.) | |
|---|---|---|
| 1-year return | +48.3% | -30.4% |
| 5-year return | +103.0% | -97.1% |
| Volatility (ann.) | 31.3% | 77.1% |
| Beta vs S&P 500 | -0.07 | 1.65 |
| Max drawdown (3Y) | -28.3% | -87.6% |
| Market cap | – | – |
| P/E (trailing) | 36.7 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | MBBC | POLA |
|---|---|---|
| 2022 | +4.7% | -64.0% |
| 2023 | -17.0% | -68.2% |
| 2024 | +49.9% | +11.5% |
| 2025 | +19.2% | -47.8% |
| 2026 | +26.6% | -13.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MBBC and POLA good diversifiers for each other?
Yes. With a correlation of -0.25, MBBC and POLA have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between MBBC and POLA?
As of 2026-08-27, the correlation of weekly returns between MBBC and POLA is -0.25 over 3 years, -0.22 over 1 year and -0.17 over 5 years.
Is POLA a good diversifier for MBBC?
Yes. With a correlation of -0.25, MBBC and POLA have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.25 mean?
A reading of -0.25 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/mbbc-vs-pola.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/mbbc-vs-pola/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: MBBC correlations · POLA correlations
