PTLO vs RDIB: Correlation
Portillo's Inc. (PTLO) and Reading International Inc - Class B Voting (RDIB) show a negative relationship: their 3-year correlation of weekly returns is -0.21.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PTLO and RDIB?
Across a 3-year window, the weekly returns of PTLO and RDIB correlate at -0.21, negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.23 over 1 year against -0.21 over 3. Stretching to 5 years gives -0.13, with an annualized covariance of -913.8 %².
Among the 11 assets we track against PTLO, RDIB sits near the bottom by co-movement, at rank #8. Their recent paths diverged sharply: over the last 12 months RDIB outperformed by 48.8 percentage points (-36.0% for PTLO against +12.8% for RDIB). One caveat on sizing: RDIB is 1.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
PTLO vs RDIB: side by side
| PTLO (Portillo's Inc.) | RDIB (Reading International Inc - Class B Voting) | |
|---|---|---|
| 1-year return | -36.0% | +12.8% |
| 5-year return | -84.6% | -35.9% |
| Volatility (ann.) | 52.1% | 83.4% |
| Beta vs S&P 500 | 0.82 | 0.58 |
| Max drawdown (3Y) | -79.5% | -72.8% |
| Market cap | $0.3B | $0.4B |
| P/E (trailing) | 24.9 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PTLO | RDIB |
|---|---|---|
| 2022 | -56.5% | -14.5% |
| 2023 | -2.4% | -29.1% |
| 2024 | -41.0% | -39.6% |
| 2025 | -51.7% | +36.5% |
| 2026 | -1.3% | +32.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PTLO and RDIB good diversifiers for each other?
Yes. With a correlation of -0.21, PTLO and RDIB have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between PTLO and RDIB?
As of 2026-08-27, the correlation of weekly returns between PTLO and RDIB is -0.21 over 3 years, -0.23 over 1 year and -0.13 over 5 years.
Is RDIB a good diversifier for PTLO?
Yes. With a correlation of -0.21, PTLO and RDIB have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 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/ptlo-vs-rdib.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/ptlo-vs-rdib/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PTLO correlations · RDIB correlations
