ECO vs TEN

For growth investors, Okeanis Eco Tankers Corp.

(ECO) is the stronger pick with -0. 4% revenue growth year-over-year, versus -9. 6% for Tsakos Energy Navigation Limited (TEN). Tsakos Energy Navigation Limited (TEN) offers the better valuation at 8. 7x trailing P/E (6. 6x forward), making it the more compelling value choice. Analysts rate Okeanis Eco Tankers Corp. (ECO) a "Buy" — based on 1 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Tsakos Energy Navigation Limited (TEN) is the cheapest at 8.

7x versus Okeanis Eco Tankers Corp. at 15. 0x. On forward P/E, Okeanis Eco Tankers Corp. is actually cheaper at 6. 2x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Tsakos Energy Navigation Limited wins at 0. 09x versus Okeanis Eco Tankers Corp. 's 1. 60x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Okeanis Eco Tankers Corp.

(ECO) delivered a total return of +748. 9%, compared to +415. 4% for Tsakos Energy Navigation Limited (TEN). Over 10 years, the gap is even starker: ECO returned +944. 3% versus TEN's +77. 4%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Okeanis Eco Tankers Corp.

(ECO) is the lower-risk stock at 0. 33β versus Tsakos Energy Navigation Limited's 0. 33β — meaning TEN is approximately 2% more volatile than ECO relative to the S&P 500. On balance sheet safety, Tsakos Energy Navigation Limited (TEN) carries a lower debt/equity ratio of 100% versus 106% for Okeanis Eco Tankers Corp. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Okeanis Eco Tankers Corp.

(ECO) is pulling ahead at -0. 4% versus -9. 6% for Tsakos Energy Navigation Limited (TEN). On earnings-per-share growth, the picture is similar: Okeanis Eco Tankers Corp. grew EPS 11. 5% year-over-year, compared to -44. 4% for Tsakos Energy Navigation Limited. Over a 3-year CAGR, TEN leads at 13. 8% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Okeanis Eco Tankers Corp.

(ECO) is the more profitable company, earning 31. 4% net margin versus 21. 9% for Tsakos Energy Navigation Limited — meaning it keeps 31. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ECO leads at 41. 5% versus 34. 6% for TEN. At the gross margin level — before operating expenses — ECO leads at 57. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Tsakos Energy Navigation Limited (TEN) is the more undervalued stock at a PEG of 0. 09x versus Okeanis Eco Tankers Corp. 's 1. 60x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Okeanis Eco Tankers Corp. (ECO) trades at 6. 2x forward P/E versus 6. 6x for Tsakos Energy Navigation Limited — 0. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TEN: 13. 6% to $50. 00.

All stocks in this comparison pay dividends.

Tsakos Energy Navigation Limited (TEN) offers the highest yield at 5. 5%, versus 3. 8% for Okeanis Eco Tankers Corp. (ECO).

For long-horizon retirement investors, Okeanis Eco Tankers Corp.

(ECO) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 33), 3. 8% yield, +944. 3% 10Y return). Both have compounded well over 10 years (ECO: +944. 3%, TEN: +77. 4%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (ECO (Industrials) and TEN (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.