ECO vs. TAN

Last updated Jun 3, 2026

ECO (Okeanis Eco Tankers Corp) is a stock, while TAN (Invesco Solar ETF) is Alternative Energy Equities fund tracking the MAC Global Solar Energy Index. Over the past year, ECO returned 135.11% vs 127.12% for TAN. At a 0.09 correlation, their price movements are largely independent.

Performance

ECO vs. TAN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Okeanis Eco Tankers Corp (ECO) and Invesco Solar ETF (TAN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ECO achieves a 52.20% return, which is significantly higher than TAN's 47.13% return.

ECO

• 1D: -0.86%
• 1M: -9.18%
• YTD: 52.20%
• 6M: 42.40%
• 1Y: 135.11%
• 3Y*: —
• 5Y*: —
• 10Y*: —

TAN

• 1D: 1.60%
• 1M: 21.93%
• YTD: 47.13%
• 6M: 51.73%
• 1Y: 127.12%
• 3Y*: 0.29%
• 5Y*: -0.77%
• 10Y*: 13.81%

*Multi-year figures are annualized to reflect compound growth (CAGR)

ECO vs. TAN - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
ECO Okeanis Eco Tankers Corp	52.20%	71.94%	-11.70%	-1.51%
TAN Invesco Solar ETF	47.13%	48.31%	-37.61%	16.54%

Correlation

The correlation between ECO and TAN is -0.00, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.00
Correlation (All Time) Calculated using the full available price history since Dec 11, 2023	0.09

Return for Risk

ECO vs. TAN — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

ECO

ECO Risk / Return Rank: 94
ECO Sharpe Ratio Rank: 95
ECO Sortino Ratio Rank: 94
ECO Omega Ratio Rank: 90
ECO Calmar Ratio Rank: 95
ECO Martin Ratio Rank: 96

TAN

TAN Risk / Return Rank: 89
TAN Sharpe Ratio Rank: 93
TAN Sortino Ratio Rank: 87
TAN Omega Ratio Rank: 80
TAN Calmar Ratio Rank: 96
TAN Martin Ratio Rank: 91

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

ECO vs. TAN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Okeanis Eco Tankers Corp (ECO) and Invesco Solar ETF (TAN). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	ECO	TAN	Difference
Sharpe ratio Return per unit of total volatility	3.35	3.44	-0.09
Sortino ratio Return per unit of downside risk	3.88	3.94	-0.06
Omega ratio Gain probability vs. loss probability	1.44	1.48	-0.04
Calmar ratio Return relative to maximum drawdown	7.61	9.06	-1.45
Martin ratio Return relative to average drawdown	22.54	22.01	+0.53
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ECO vs. TAN - Sharpe Ratio Comparison

The current ECO Sharpe Ratio is 3.35, which is comparable to the TAN Sharpe Ratio of 3.44. The chart below compares the historical Sharpe Ratios of ECO and TAN, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	ECO	TAN	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.35	3.44	-0.09
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.02	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.37	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.95	-0.12	+1.06

Drawdowns

ECO vs. TAN - Drawdown Comparison

The maximum ECO drawdown since its inception was -46.15%, smaller than the maximum TAN drawdown of -95.29%. Use the drawdown chart below to compare losses from any high point for ECO and TAN.

Drawdown Indicators

	ECO	TAN	Difference
Max Drawdown Largest peak-to-trough decline	-46.15%	-95.29%	+49.14%
Max Drawdown (1Y) Largest decline over 1 year	-17.66%	-13.62%	-4.04%
Max Drawdown (3Y) Largest decline over 3 years	—	-64.40%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-73.95%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-78.53%	—
Current Drawdown Current decline from peak	-12.09%	-66.81%	+54.72%
Average Drawdown Average peak-to-trough decline	-15.22%	-78.51%	+63.29%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.97%	5.61%	+0.36%

Volatility

ECO vs. TAN - Volatility Comparison

Okeanis Eco Tankers Corp (ECO) and Invesco Solar ETF (TAN) have volatilities of 12.26% and 11.81%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ECO	TAN	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.26%	11.81%	+0.45%
Volatility (6M) Calculated over the trailing 6-month period	29.98%	25.30%	+4.68%
Volatility (1Y) Calculated over the trailing 1-year period	40.57%	37.21%	+3.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	42.02%	39.74%	+2.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	42.02%	37.98%	+4.04%

Dividends

ECO vs. TAN - Dividend Comparison

ECO's dividend yield for the trailing twelve months is around 11.04%, while TAN has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ECO Okeanis Eco Tankers Corp	10.38%	6.26%	15.57%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TAN Invesco Solar ETF	0.00%	0.00%	0.50%	0.09%	0.00%	0.00%	0.09%	0.30%	0.69%	1.77%	5.04%	1.60%

Frequently Asked Questions

Can I hold both ECO and TAN in my portfolio?

ECO and TAN have a correlation of -0.00, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ECO or TAN?

ECO has higher volatility (12.26%) compared to TAN (11.81%). In terms of maximum drawdown, ECO dropped -46.15% vs TAN's -95.29%.

Which has better risk-adjusted returns?

TAN currently has the higher Sharpe Ratio (3.44 vs 3.35), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.