JL vs MBBC: Correlation
How closely do J-Long Group Limited - Class A (JL) and Marathon Bancorp, Inc. (MBBC) trade together? Their weekly returns over three years give a correlation of 0.47, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are JL and MBBC?
Over the past 3 years, JL and MBBC moved with a correlation of 0.47, which is moderate. The link has loosened recently: the 1-year correlation (0.02) runs below the 3-year figure (0.47). Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is 6352.3 %².
Among the 58 assets we track against JL, MBBC ranks #8 by 3-year correlation. The last year tells two different stories: MBBC led by 64.7 percentage points, -16.4% for JL against +48.3% for MBBC. Note the risk asymmetry: JL runs 18.5 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.
JL vs MBBC: side by side
| JL (J-Long Group Limited - Class A) | MBBC (Marathon Bancorp, Inc.) | |
|---|---|---|
| 1-year return | -16.4% | +48.3% |
| 5-year return | n/a | +103.0% |
| Volatility (ann.) | 580.0% | 31.3% |
| Beta vs S&P 500 | -1.02 | -0.07 |
| Max drawdown (3Y) | -98.6% | -28.3% |
| Market cap | – | – |
| P/E (trailing) | 6.5 | 36.7 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | JL | MBBC |
|---|---|---|
| 2022 | – | +4.7% |
| 2023 | – | -17.0% |
| 2024 | – | +49.9% |
| 2025 | +67.1% | +19.2% |
| 2026 | -20.1% | +26.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are JL and MBBC good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between JL and MBBC?
Using weekly returns as of 2026-08-27: 0.47 over 3 years, with 0.02 over the last year and n/a over 5 years.
Is MBBC a good diversifier for JL?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.47 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/jl-vs-mbbc.json
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[](https://www.pairbook.io/pair/jl-vs-mbbc/)
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Related comparisons
Hubs: JL correlations · MBBC correlations
