MABDX vs. MAMEX

Last updated Apr 1, 2026

Compare and contrast key facts about Mutual of America Bond Fund (MABDX) and Mutual of America Mid-Cap Equity Index Fund (MAMEX).

MABDX is managed by Mutual of America. It was launched on Nov 29, 2021. MAMEX is managed by Mutual of America. It was launched on Nov 29, 2021.

Performance

MABDX vs. MAMEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Mutual of America Bond Fund (MABDX) and Mutual of America Mid-Cap Equity Index Fund (MAMEX). The values are adjusted to include any dividend payments, if applicable.

MABDX vs. MAMEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
MABDX Mutual of America Bond Fund	-0.39%	7.58%	0.53%	4.08%	-12.96%	-2.98%	914.19%
MAMEX Mutual of America Mid-Cap Equity Index Fund	-0.45%	7.40%	13.08%	13.99%	-13.59%	23.35%	925.33%

Returns By Period

In the year-to-date period, MABDX achieves a -0.39% return, which is significantly higher than MAMEX's -0.45% return.

MABDX

• 1D: 0.49%
• 1M: -1.83%
• YTD: -0.39%
• 6M: 0.86%
• 1Y: 4.27%
• 3Y*: 3.02%
• 5Y*: -0.31%
• 10Y*: —

MAMEX

• 1D: -2.44%
• 1M: -8.80%
• YTD: -0.45%
• 6M: 1.26%
• 1Y: 13.94%
• 3Y*: 10.08%
• 5Y*: 5.30%
• 10Y*: —

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

MABDX vs. MAMEX - Expense Ratio Comparison

MABDX has a 0.43% expense ratio, which is higher than MAMEX's 0.16% expense ratio.

MABDX

Mutual of America Bond Fund

MAMEX

Mutual of America Mid-Cap Equity Index Fund

Return for Risk

MABDX vs. MAMEX — Risk / Return Rank

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

MABDX

MABDX Risk / Return Rank: 64
MABDX Sharpe Ratio Rank: 62
MABDX Sortino Ratio Rank: 61
MABDX Omega Ratio Rank: 45
MABDX Calmar Ratio Rank: 82
MABDX Martin Ratio Rank: 68

MAMEX

MAMEX Risk / Return Rank: 24
MAMEX Sharpe Ratio Rank: 29
MAMEX Sortino Ratio Rank: 33
MAMEX Omega Ratio Rank: 31
MAMEX Calmar Ratio Rank: 13
MAMEX Martin Ratio Rank: 14

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.

MABDX vs. MAMEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Mutual of America Bond Fund (MABDX) and Mutual of America Mid-Cap Equity Index Fund (MAMEX). 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.

	MABDX	MAMEX	Difference
Sharpe ratio Return per unit of total volatility	1.14	0.72	+0.41
Sortino ratio Return per unit of downside risk	1.62	1.18	+0.44
Omega ratio Gain probability vs. loss probability	1.20	1.16	+0.04
Calmar ratio Return relative to maximum drawdown	2.03	0.35	+1.68
Martin ratio Return relative to average drawdown	6.43	1.45	+4.99
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MABDX vs. MAMEX - Sharpe Ratio Comparison

The current MABDX Sharpe Ratio is 1.14, which is higher than the MAMEX Sharpe Ratio of 0.72. The chart below compares the historical Sharpe Ratios of MABDX and MAMEX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	MABDX	MAMEX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.14	0.72	+0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.06	0.27	-0.33
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.16	-0.03

Correlation

The correlation between MABDX and MAMEX is 0.05, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

MABDX vs. MAMEX - Dividend Comparison

MABDX's dividend yield for the trailing twelve months is around 4.12%, less than MAMEX's 11.90% yield.

	TTM	2025	2024	2023	2022	2021
MABDX Mutual of America Bond Fund	4.12%	4.10%	3.26%	2.42%	1.66%	1.77%
MAMEX Mutual of America Mid-Cap Equity Index Fund	11.90%	11.85%	9.07%	7.67%	14.01%	12.96%

Drawdowns

MABDX vs. MAMEX - Drawdown Comparison

The maximum MABDX drawdown since its inception was -23.20%, smaller than the maximum MAMEX drawdown of -42.17%. Use the drawdown chart below to compare losses from any high point for MABDX and MAMEX.

Drawdown Indicators

	MABDX	MAMEX	Difference
Max Drawdown Largest peak-to-trough decline	-23.20%	-42.17%	+18.97%
Max Drawdown (1Y) Largest decline over 1 year	-2.65%	-14.16%	+11.51%
Max Drawdown (5Y) Largest decline over 5 years	-18.51%	-24.39%	+5.88%
Current Drawdown Current decline from peak	-10.01%	-8.84%	-1.17%
Average Drawdown Average peak-to-trough decline	-12.06%	-7.68%	-4.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.84%	4.14%	-3.30%

Volatility

MABDX vs. MAMEX - Volatility Comparison

The current volatility for Mutual of America Bond Fund (MABDX) is 1.35%, while Mutual of America Mid-Cap Equity Index Fund (MAMEX) has a volatility of 4.62%. This indicates that MABDX experiences smaller price fluctuations and is considered to be less risky than MAMEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MABDX	MAMEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.35%	4.62%	-3.27%
Volatility (6M) Calculated over the trailing 6-month period	2.65%	11.83%	-9.18%
Volatility (1Y) Calculated over the trailing 1-year period	4.34%	21.79%	-17.45%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.31%	22.02%	-15.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	381.49%	389.19%	-7.70%