NRT vs REI: Correlation
How closely do North European Oil Royality Trust (NRT) and Ring Energy, Inc. (REI) trade together? Their weekly returns over three years give a correlation of 0.41, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NRT and REI?
Across a 3-year window, the weekly returns of NRT and REI correlate at 0.41, moderate. The relationship has been stable: the 1-year correlation (0.39) sits close to the 3-year figure. Stretching to 5 years gives 0.40, with an annualized covariance of 1154.7 %².
By 3-year correlation, REI places #5 of the 62 assets tracked against NRT. Correlation aside, the last 12 months split them widely, with NRT ahead by 51.6 points (+85.2% versus +33.6%).
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.
NRT vs REI: side by side
| NRT (North European Oil Royality Trust) | REI (Ring Energy, Inc.) | |
|---|---|---|
| 1-year return | +85.2% | +33.6% |
| 5-year return | +131.5% | -36.4% |
| Volatility (ann.) | 51.6% | 54.5% |
| Beta vs S&P 500 | -0.42 | 0.37 |
| Max drawdown (3Y) | -66.1% | -65.6% |
| Market cap | $0.1B | $0.4B |
| P/E (trailing) | 8.4 | – |
| Dividend yield | 11.95% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NRT | REI |
|---|---|---|
| 2022 | +41.9% | +7.9% |
| 2023 | -46.5% | -40.7% |
| 2024 | -25.3% | -6.8% |
| 2025 | +88.4% | -36.0% |
| 2026 | +41.9% | +69.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NRT and REI good diversifiers for each other?
Reasonably. At 0.41, NRT and REI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between NRT and REI?
Using weekly returns as of 2026-08-27: 0.41 over 3 years, with 0.39 over the last year and 0.40 over 5 years.
Is REI a good diversifier for NRT?
Reasonably. At 0.41, NRT and REI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.41 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/nrt-vs-rei.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/nrt-vs-rei/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NRT correlations · REI correlations
