NPKI vs ORN: Correlation
NPK International Inc. (NPKI) and Orion Group Holdings, Inc. Common (ORN) show a moderate relationship: their 3-year correlation of weekly returns is 0.51.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NPKI and ORN?
Over the past 3 years, NPKI and ORN moved with a correlation of 0.51, which is moderate. Recent behaviour matches the longer record: 0.53 over 1 year against 0.51 over 3. Over 5 years the correlation is 0.36, and the annualized covariance of weekly returns is 1353.2 %².
Within NPKI's tracked universe of 15 assets, ORN comes in at #6 by 3-year correlation. Neither side won the trailing year by much: +31.6% against +34.6%. One caveat on sizing: ORN 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.
NPKI vs ORN: side by side
| NPKI (NPK International Inc.) | ORN (Orion Group Holdings, Inc. Common) | |
|---|---|---|
| 1-year return | +31.6% | +34.6% |
| 5-year return | +429.3% | +77.6% |
| Volatility (ann.) | 41.0% | 65.3% |
| Beta vs S&P 500 | 0.88 | 1.64 |
| Max drawdown (3Y) | -42.1% | -57.6% |
| Market cap | $1.2B | $0.4B |
| P/E (trailing) | 28.8 | 121.6 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NPKI | ORN |
|---|---|---|
| 2022 | +41.2% | -36.9% |
| 2023 | +60.0% | +107.6% |
| 2024 | +15.5% | +48.4% |
| 2025 | +55.4% | +35.6% |
| 2026 | +13.7% | -2.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NPKI and ORN good diversifiers for each other?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between NPKI and ORN?
As of 2026-08-27, the correlation of weekly returns between NPKI and ORN is 0.51 over 3 years, 0.53 over 1 year and 0.36 over 5 years.
Is ORN a good diversifier for NPKI?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.51 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/npki-vs-orn.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/npki-vs-orn/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: NPKI correlations · ORN correlations
