DAIO vs NAT: Correlation
Measured on weekly returns over the past three years, Data I/O Corporation (DAIO) and Nordic American Tankers Limited (NAT) carry a correlation of -0.23, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DAIO and NAT?
Over the past 3 years, DAIO and NAT moved with a correlation of -0.23, which is negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.32 over 1 year against -0.23 over 3. Over 5 years the correlation is -0.16, and the annualized covariance of weekly returns is -359.9 %².
Out of 16 assets tracked against DAIO, NAT lands near the bottom at #13. The last year tells two different stories: NAT led by 138.3 percentage points, -0.7% for DAIO against +137.6% for NAT.
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.
DAIO vs NAT: side by side
| DAIO (Data I/O Corporation) | NAT (Nordic American Tankers Limited) | |
|---|---|---|
| 1-year return | -0.7% | +137.6% |
| 5-year return | -48.4% | +351.2% |
| Volatility (ann.) | 43.6% | 36.0% |
| Beta vs S&P 500 | 0.74 | 0.30 |
| Max drawdown (3Y) | -52.9% | -46.3% |
| Market cap | – | – |
| P/E (trailing) | – | 25.0 |
| Dividend yield | 0.00% | 9.51% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | DAIO | NAT |
|---|---|---|
| 2022 | -13.9% | +87.9% |
| 2023 | -25.9% | +55.8% |
| 2024 | -5.8% | -33.6% |
| 2025 | +14.4% | +44.6% |
| 2026 | -6.0% | +111.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DAIO and NAT good diversifiers for each other?
Yes. With a correlation of -0.23, DAIO and NAT have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between DAIO and NAT?
Using weekly returns as of 2026-08-27: -0.23 over 3 years, with -0.32 over the last year and -0.16 over 5 years.
Is NAT a good diversifier for DAIO?
Yes. With a correlation of -0.23, DAIO and NAT have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.23 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/daio-vs-nat.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/daio-vs-nat/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: DAIO correlations · NAT correlations
