EOS vs. EOI

Last updated Jun 23, 2026

EOS (Eaton Vance Enhanced Equity Income Fund II) and EOI (Eaton Vance Enhanced Equity Income Fund) are both mutual funds - EOS is a Derivative Income fund actively managed by Eaton Vance, while EOI is a Large Cap Blend Equities fund managed by Eaton Vance. Over the past 10 years, EOS returned 13.63%/yr vs 12.50%/yr for EOI. A 0.76 correlation means they provide meaningful diversification when combined. EOS charges 1.09%/yr vs 0.01%/yr for EOI.

Performance

EOS vs. EOI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Eaton Vance Enhanced Equity Income Fund II (EOS) and Eaton Vance Enhanced Equity Income Fund (EOI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, EOS achieves a -3.08% return, which is significantly lower than EOI's -2.28% return. Over the past 10 years, EOS has outperformed EOI with an annualized return of 13.63%, while EOI has yielded a comparatively lower 12.50% annualized return.

EOS

• 1D: -1.45%
• 1M: -2.96%
• YTD: -3.08%
• 6M: -0.45%
• 1Y: 2.71%
• 3Y*: 17.02%
• 5Y*: 7.44%
• 10Y*: 13.63%

EOI

• 1D: -0.62%
• 1M: -1.60%
• YTD: -2.28%
• 6M: -0.98%
• 1Y: 4.18%
• 3Y*: 15.60%
• 5Y*: 9.54%
• 10Y*: 12.50%

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

EOS vs. EOI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
EOS Eaton Vance Enhanced Equity Income Fund II	-3.08%	5.77%	38.69%	22.59%	-26.50%	20.30%	29.45%	30.32%	2.77%	27.89%
EOI Eaton Vance Enhanced Equity Income Fund	-2.28%	7.21%	35.73%	20.67%	-19.78%	32.93%	9.59%	31.97%	-4.26%	26.31%

Correlation

The correlation between EOS and EOI is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (10Y) Calculated over the trailing 10-year period	0.73
Correlation (All Time) Calculated using the full available price history since Jan 27, 2005	0.76

The correlation between EOS and EOI has been stable across timeframes, ranging from 0.73 to 0.82 - a consistent structural relationship.

Return for Risk

EOS vs. EOI — Risk / Return Rank

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

EOS

EOS Risk / Return Rank: 4
EOS Sharpe Ratio Rank: 4
EOS Sortino Ratio Rank: 4
EOS Omega Ratio Rank: 4
EOS Calmar Ratio Rank: 4
EOS Martin Ratio Rank: 4

EOI

EOI Risk / Return Rank: 5
EOI Sharpe Ratio Rank: 5
EOI Sortino Ratio Rank: 5
EOI Omega Ratio Rank: 5
EOI Calmar Ratio Rank: 5
EOI Martin Ratio Rank: 5

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.

EOS vs. EOI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Eaton Vance Enhanced Equity Income Fund II (EOS) and Eaton Vance Enhanced Equity Income Fund (EOI). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	EOS	EOI	Difference
Sharpe ratio: Return per unit of total volatility	0.18	0.32	-0.14
Sortino ratio: Return per unit of downside risk	0.36	0.54	-0.17
Omega ratio: Gain probability vs. loss probability	1.04	1.07	-0.02
Calmar ratio: Return relative to maximum drawdown	0.16	0.34	-0.18
Martin ratio: Return relative to average drawdown	0.51	1.09	-0.58

EOS vs. EOI - Sharpe Ratio Comparison

The current EOS Sharpe Ratio is 0.18, which is lower than the EOI Sharpe Ratio of 0.32. The chart below compares the historical Sharpe Ratios of EOS and EOI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

EOS vs. EOI - Drawdown Comparison

The maximum EOS drawdown since its inception was -55.74%, roughly equal to the maximum EOI drawdown of -53.72%. Use the drawdown chart below to compare losses from any high point for EOS and EOI.

Drawdown Indicators

	EOS	EOI	Difference
Max Drawdown Largest peak-to-trough decline	-55.74%	-53.72%	-2.02%
Max Drawdown (1Y) Largest decline over 1 year	-17.12%	-12.52%	-4.60%
Max Drawdown (3Y) Largest decline over 3 years	-24.31%	-23.15%	-1.16%
Max Drawdown (5Y) Largest decline over 5 years	-34.32%	-26.82%	-7.50%
Max Drawdown (10Y) Largest decline over 10 years	-41.12%	-40.01%	-1.11%
Current Drawdown Current decline from peak	-5.31%	-4.81%	-0.50%
Average Drawdown Average peak-to-trough decline	-7.82%	-7.38%	-0.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.36%	3.86%	+1.50%

Volatility

EOS vs. EOI - Volatility Comparison

Eaton Vance Enhanced Equity Income Fund II (EOS) has a higher volatility of 4.79% compared to Eaton Vance Enhanced Equity Income Fund (EOI) at 3.85%. This indicates that EOS's price experiences larger fluctuations and is considered to be riskier than EOI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	EOS	EOI	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.79%	3.85%	+0.94%
Volatility (6M) Calculated over the trailing 6-month period	12.30%	10.78%	+1.52%
Volatility (1Y) Calculated over the trailing 1-year period	15.52%	13.18%	+2.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.76%	18.68%	+1.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.75%	19.90%	+0.85%

EOS vs. EOI - Expense Ratio Comparison

EOS has a 1.09% expense ratio, which is higher than EOI's 0.01% expense ratio.

Dividends

EOS vs. EOI - Dividend Comparison

EOS's dividend yield for the trailing twelve months is around 8.40%, which matches EOI's 8.32% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
EOI Eaton Vance Enhanced Equity Income Fund	8.32%	7.81%	7.38%	7.93%	8.80%	5.83%	6.66%	6.78%	8.01%	7.15%	8.36%	7.73%
EOS Eaton Vance Enhanced Equity Income Fund II	8.40%	7.81%	7.17%	7.38%	9.69%	5.60%	5.01%	6.65%	7.16%	6.90%	8.20%	7.70%

Frequently Asked Questions

Can I hold both EOS and EOI in my portfolio?

EOS and EOI have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, EOS or EOI?

EOS has higher volatility (4.79%) compared to EOI (3.85%). In terms of maximum drawdown, EOS dropped -55.74% vs EOI's -53.72%.

Which has better risk-adjusted returns?

EOI currently has the higher Sharpe Ratio (0.32 vs 0.18), 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.