ECO vs TEN: Correlation
How closely do Okeanis Eco Tankers Corp. (ECO) and Tsakos Energy Navigation Ltd (TEN) trade together? Their weekly returns over three years give a correlation of 0.70, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ECO and TEN?
Over the past 3 years, ECO and TEN moved with a correlation of 0.70, which is strong. The link has tightened recently: the 1-year correlation (0.81) runs above the 3-year figure (0.70). Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is 1141.0 %².
Few assets follow ECO as closely as TEN, which ranks #3 of 13 tracked partners. Their recent paths diverged sharply: over the last 12 months ECO outperformed by 91.6 percentage points (+189.8% for ECO against +98.2% for TEN).
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.
ECO vs TEN: side by side
| ECO (Okeanis Eco Tankers Corp.) | TEN (Tsakos Energy Navigation Ltd) | |
|---|---|---|
| 1-year return | +189.8% | +98.2% |
| 5-year return | n/a | +584.9% |
| Volatility (ann.) | 44.3% | 36.7% |
| Beta vs S&P 500 | 0.52 | 0.66 |
| Max drawdown (3Y) | -46.1% | -52.6% |
| Market cap | $2.6B | $1.3B |
| P/E (trailing) | 5.8 | 6.6 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ECO | TEN |
|---|---|---|
| 2022 | – | +138.5% |
| 2023 | – | +38.1% |
| 2024 | -11.7% | -16.0% |
| 2025 | +64.2% | +33.1% |
| 2026 | +128.8% | +92.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ECO and TEN good diversifiers for each other?
To a limited degree. At 0.70 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 ECO and TEN?
As of 2026-08-27, the correlation of weekly returns between ECO and TEN is 0.70 over 3 years, 0.81 over 1 year and n/a over 5 years.
Is TEN a good diversifier for ECO?
To a limited degree. At 0.70 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 0.70 mean?
A reading of 0.70 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/eco-vs-ten.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/eco-vs-ten/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ECO correlations · TEN correlations
