IRIX vs MBBC: Correlation
Measured on weekly returns over the past three years, IRIDEX Corporation (IRIX) and Marathon Bancorp, Inc. (MBBC) carry a correlation of 0.30, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IRIX and MBBC?
Across a 3-year window, the weekly returns of IRIX and MBBC correlate at 0.30, moderate. Recent behaviour matches the longer record: 0.21 over 1 year against 0.30 over 3. Stretching to 5 years gives 0.27, with an annualized covariance of 578.9 %².
MBBC is one of the assets that tracks IRIX most closely: it ranks #3 out of the 10 assets we track against IRIX. Their recent paths diverged sharply: over the last 12 months MBBC outperformed by 93.5 percentage points (-45.2% for IRIX against +48.3% for MBBC). Note the risk asymmetry: IRIX runs 1.9 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.
IRIX vs MBBC: side by side
| IRIX (IRIDEX Corporation) | MBBC (Marathon Bancorp, Inc.) | |
|---|---|---|
| 1-year return | -45.2% | +48.3% |
| 5-year return | -90.8% | +103.0% |
| Volatility (ann.) | 60.9% | 31.3% |
| Beta vs S&P 500 | 0.50 | -0.07 |
| Max drawdown (3Y) | -79.9% | -28.3% |
| Market cap | – | – |
| P/E (trailing) | – | 36.7 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IRIX | MBBC |
|---|---|---|
| 2022 | -67.1% | +4.7% |
| 2023 | +39.8% | -17.0% |
| 2024 | -40.2% | +49.9% |
| 2025 | -32.1% | +19.2% |
| 2026 | -37.5% | +26.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IRIX and MBBC good diversifiers for each other?
A fair diversifier. At 0.30, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between IRIX and MBBC?
As of 2026-08-27, the correlation of weekly returns between IRIX and MBBC is 0.30 over 3 years, 0.21 over 1 year and 0.27 over 5 years.
Is MBBC a good diversifier for IRIX?
A fair diversifier. At 0.30, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.30 mean?
On the −1 to +1 scale, 0.30 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/irix-vs-mbbc.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/irix-vs-mbbc/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: IRIX correlations · MBBC correlations
