ECO vs TEN vs TNK vs INSW

For growth investors, Okeanis Eco Tankers Corp.

(ECO) is the stronger pick with -0. 4% revenue growth year-over-year, versus -22. 6% for Teekay Tankers Ltd. (TNK). Teekay Tankers Ltd. (TNK) offers the better valuation at 8. 0x trailing P/E (6. 0x 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, Teekay Tankers Ltd.

(TNK) is the cheapest at 8. 0x versus Okeanis Eco Tankers Corp. at 15. 0x. On forward P/E, Teekay Tankers Ltd. is actually cheaper at 6. 0x. 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: INSW returned +1015% 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 International Seaways, Inc. 's 0. 43β — meaning INSW is approximately 32% more volatile than ECO relative to the S&P 500. On balance sheet safety, Teekay Tankers Ltd. (TNK) carries a lower debt/equity ratio of 3% 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 -22. 6% for Teekay Tankers Ltd. (TNK). 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.

Teekay Tankers Ltd.

(TNK) is the more profitable company, earning 36. 9% net margin versus 21. 9% for Tsakos Energy Navigation Limited — meaning it keeps 36. 9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ECO leads at 41. 5% versus 22. 6% for TNK. 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, Teekay Tankers Ltd. (TNK) trades at 6. 0x forward P/E versus 8. 5x for International Seaways, Inc. — 2. 5x 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 2. 4% for Teekay Tankers Ltd. (TNK).

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) and TNK (Energy) and INSW (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.