ETB vs. MAIPX

Last updated Jun 5, 2026

ETB (Eaton Vance Tax-Managed Buy-Write Income Fund) and MAIPX (MAI Managed Volatility Fund) are both Options Trading funds. Over the past 10 years, ETB returned 8.49%/yr vs 7.29%/yr for MAIPX. A 0.59 correlation means they provide meaningful diversification when combined. ETB charges 0.01%/yr vs 0.99%/yr for MAIPX.

Performance

ETB vs. MAIPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Eaton Vance Tax-Managed Buy-Write Income Fund (ETB) and MAI Managed Volatility Fund (MAIPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ETB achieves a 4.96% return, which is significantly lower than MAIPX's 5.81% return. Over the past 10 years, ETB has outperformed MAIPX with an annualized return of 8.49%, while MAIPX has yielded a comparatively lower 7.29% annualized return.

ETB

• 1D: -0.06%
• 1M: 1.02%
• YTD: 4.96%
• 6M: 5.97%
• 1Y: 20.11%
• 3Y*: 15.32%
• 5Y*: 7.63%
• 10Y*: 8.49%

MAIPX

• 1D: -0.11%
• 1M: 1.63%
• YTD: 5.81%
• 6M: 6.00%
• 1Y: 13.62%
• 3Y*: 10.14%
• 5Y*: 7.52%
• 10Y*: 7.29%

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

ETB vs. MAIPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ETB Eaton Vance Tax-Managed Buy-Write Income Fund	4.96%	11.16%	26.22%	7.50%	-16.59%	23.68%	0.43%	32.40%	-12.75%	9.52%
MAIPX MAI Managed Volatility Fund	5.81%	10.28%	8.64%	10.58%	-3.59%	12.81%	4.39%	16.13%	-2.76%	8.66%

Correlation

The correlation between ETB and MAIPX is 0.65, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.64
Correlation (10Y) Calculated over the trailing 10-year period	0.57
Correlation (All Time) Calculated using the full available price history since Oct 1, 2010	0.59

The correlation between ETB and MAIPX has been stable across timeframes, ranging from 0.57 to 0.66 - a consistent structural relationship.

Return for Risk

ETB vs. MAIPX — Risk / Return Rank

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

ETB

ETB Risk / Return Rank: 44
ETB Sharpe Ratio Rank: 41
ETB Sortino Ratio Rank: 41
ETB Omega Ratio Rank: 42
ETB Calmar Ratio Rank: 36
ETB Martin Ratio Rank: 59

MAIPX

MAIPX Risk / Return Rank: 92
MAIPX Sharpe Ratio Rank: 90
MAIPX Sortino Ratio Rank: 92
MAIPX Omega Ratio Rank: 91
MAIPX Calmar Ratio Rank: 89
MAIPX Martin Ratio Rank: 97

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.

ETB vs. MAIPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Eaton Vance Tax-Managed Buy-Write Income Fund (ETB) and MAI Managed Volatility Fund (MAIPX). 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.

	ETB	MAIPX	Difference
Sharpe ratio: Return per unit of total volatility	1.81	2.94	-1.13
Sortino ratio: Return per unit of downside risk	2.61	4.58	-1.97
Omega ratio: Gain probability vs. loss probability	1.34	1.68	-0.35
Calmar ratio: Return relative to maximum drawdown	2.20	4.46	-2.25
Martin ratio: Return relative to average drawdown	11.57	26.34	-14.77
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ETB vs. MAIPX - Sharpe Ratio Comparison

The current ETB Sharpe Ratio is 1.81, which is lower than the MAIPX Sharpe Ratio of 2.94. The chart below compares the historical Sharpe Ratios of ETB and MAIPX, 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

	ETB	MAIPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.81	2.94	-1.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.47	0.85	-0.38
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.47	0.67	-0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.67	-0.27

Drawdowns

ETB vs. MAIPX - Drawdown Comparison

The maximum ETB drawdown since its inception was -51.09%, which is greater than MAIPX's maximum drawdown of -25.69%. Use the drawdown chart below to compare losses from any high point for ETB and MAIPX.

Drawdown Indicators

	ETB	MAIPX	Difference
Max Drawdown Largest peak-to-trough decline	-51.09%	-25.69%	-25.40%
Max Drawdown (1Y) Largest decline over 1 year	-9.16%	-3.10%	-6.06%
Max Drawdown (3Y) Largest decline over 3 years	-20.09%	-11.77%	-8.32%
Max Drawdown (5Y) Largest decline over 5 years	-23.43%	-11.77%	-11.66%
Max Drawdown (10Y) Largest decline over 10 years	-45.08%	-25.69%	-19.39%
Current Drawdown Current decline from peak	-0.77%	-0.23%	-0.54%
Average Drawdown Average peak-to-trough decline	-6.72%	-1.42%	-5.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.74%	0.52%	+1.22%

Volatility

ETB vs. MAIPX - Volatility Comparison

Eaton Vance Tax-Managed Buy-Write Income Fund (ETB) has a higher volatility of 2.57% compared to MAI Managed Volatility Fund (MAIPX) at 0.91%. This indicates that ETB's price experiences larger fluctuations and is considered to be riskier than MAIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ETB	MAIPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.57%	0.91%	+1.66%
Volatility (6M) Calculated over the trailing 6-month period	9.04%	3.94%	+5.10%
Volatility (1Y) Calculated over the trailing 1-year period	11.14%	4.70%	+6.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.26%	8.85%	+7.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.01%	10.97%	+7.04%

ETB vs. MAIPX - Expense Ratio Comparison

ETB has a 0.01% expense ratio, which is lower than MAIPX's 0.99% expense ratio.

Dividends

ETB vs. MAIPX - Dividend Comparison

ETB's dividend yield for the trailing twelve months is around 8.20%, more than MAIPX's 1.14% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ETB Eaton Vance Tax-Managed Buy-Write Income Fund	8.20%	8.31%	8.21%	8.62%	9.63%	7.57%	8.64%	7.90%	9.64%	7.75%	7.85%	7.77%
MAIPX MAI Managed Volatility Fund	1.14%	1.33%	2.20%	4.59%	2.26%	0.00%	0.32%	1.74%	2.89%	2.12%	0.80%	4.17%

Frequently Asked Questions

Can I hold both ETB and MAIPX in my portfolio?

ETB and MAIPX have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ETB or MAIPX?

ETB has higher volatility (2.57%) compared to MAIPX (0.91%). In terms of maximum drawdown, ETB dropped -51.09% vs MAIPX's -25.69%.

Which has better risk-adjusted returns?

MAIPX currently has the higher Sharpe Ratio (2.94 vs 1.81), 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.