NRT vs PRLB: Correlation
North European Oil Royality Trust (NRT) and Proto Labs, Inc. (PRLB) show a negative relationship: their 3-year correlation of weekly returns is -0.29.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NRT and PRLB?
Across a 3-year window, the weekly returns of NRT and PRLB correlate at -0.29, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at -0.15 versus -0.29 over 3 years. Stretching to 5 years gives -0.21, with an annualized covariance of -740.4 %².
Among the 62 assets we track against NRT, PRLB sits near the bottom by co-movement, at rank #62. Correlation aside, the last 12 months split them widely, with NRT ahead by 27.6 points (+85.2% versus +57.6%).
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 PRLB: side by side
| NRT (North European Oil Royality Trust) | PRLB (Proto Labs, Inc.) | |
|---|---|---|
| 1-year return | +85.2% | +57.6% |
| 5-year return | +131.5% | +10.1% |
| Volatility (ann.) | 51.6% | 50.3% |
| Beta vs S&P 500 | -0.42 | 1.52 |
| Max drawdown (3Y) | -66.1% | -33.6% |
| Market cap | $0.1B | $1.9B |
| P/E (trailing) | 8.4 | 62.6 |
| Dividend yield | 11.95% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NRT | PRLB |
|---|---|---|
| 2022 | +41.9% | -50.3% |
| 2023 | -46.5% | +52.6% |
| 2024 | -25.3% | +0.3% |
| 2025 | +88.4% | +29.4% |
| 2026 | +41.9% | +58.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NRT and PRLB good diversifiers for each other?
By historical standards, yes. A correlation of -0.29 means the two rarely move for the same reasons.
FAQ
What is the correlation between NRT and PRLB?
As of 2026-08-27, the correlation of weekly returns between NRT and PRLB is -0.29 over 3 years, -0.15 over 1 year and -0.21 over 5 years.
Is PRLB a good diversifier for NRT?
By historical standards, yes. A correlation of -0.29 means the two rarely move for the same reasons.
What does a correlation of -0.29 mean?
On the −1 to +1 scale, -0.29 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/nrt-vs-prlb.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/nrt-vs-prlb/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: NRT correlations · PRLB correlations
