MURMX vs. MAMEX

Last updated Apr 1, 2026

Compare and contrast key facts about Mutual of America 2045 Retirement Fund (MURMX) and Mutual of America Mid-Cap Equity Index Fund (MAMEX).

MURMX 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

MURMX vs. MAMEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Mutual of America 2045 Retirement Fund (MURMX) and Mutual of America Mid-Cap Equity Index Fund (MAMEX). The values are adjusted to include any dividend payments, if applicable.

MURMX vs. MAMEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
MURMX Mutual of America 2045 Retirement Fund	-3.82%	17.76%	13.85%	15.43%	-16.20%	17.37%	891.67%
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, MURMX achieves a -3.82% return, which is significantly lower than MAMEX's -0.45% return.

MURMX

• 1D: -1.42%
• 1M: -8.05%
• YTD: -3.82%
• 6M: -1.20%
• 1Y: 14.32%
• 3Y*: 12.11%
• 5Y*: 6.46%
• 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)

MURMX vs. MAMEX - Expense Ratio Comparison

MURMX has a 0.08% expense ratio, which is lower than MAMEX's 0.16% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

MAMEX

Mutual of America Mid-Cap Equity Index Fund

MURMX

Mutual of America 2045 Retirement Fund

Return for Risk

MURMX vs. MAMEX — Risk / Return Rank

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

MURMX

MURMX Risk / Return Rank: 46
MURMX Sharpe Ratio Rank: 56
MURMX Sortino Ratio Rank: 61
MURMX Omega Ratio Rank: 58
MURMX Calmar Ratio Rank: 25
MURMX Martin Ratio Rank: 32

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.

MURMX vs. MAMEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Mutual of America 2045 Retirement Fund (MURMX) 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.

	MURMX	MAMEX	Difference
Sharpe ratio Return per unit of total volatility	1.06	0.72	+0.34
Sortino ratio Return per unit of downside risk	1.61	1.18	+0.43
Omega ratio Gain probability vs. loss probability	1.23	1.16	+0.07
Calmar ratio Return relative to maximum drawdown	0.75	0.35	+0.40
Martin ratio Return relative to average drawdown	3.55	1.45	+2.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MURMX vs. MAMEX - Sharpe Ratio Comparison

The current MURMX Sharpe Ratio is 1.06, which is higher than the MAMEX Sharpe Ratio of 0.72. The chart below compares the historical Sharpe Ratios of MURMX 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

	MURMX	MAMEX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.06	0.72	+0.34
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.44	0.27	+0.16
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	0.16	0.00

Correlation

The correlation between MURMX and MAMEX is 0.91, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

MURMX vs. MAMEX - Dividend Comparison

MURMX's dividend yield for the trailing twelve months is around 9.14%, less than MAMEX's 11.90% yield.

	TTM	2025	2024	2023	2022	2021
MURMX Mutual of America 2045 Retirement Fund	9.14%	8.79%	8.17%	2.95%	11.94%	4.69%
MAMEX Mutual of America Mid-Cap Equity Index Fund	11.90%	11.85%	9.07%	7.67%	14.01%	12.96%

Drawdowns

MURMX vs. MAMEX - Drawdown Comparison

The maximum MURMX drawdown since its inception was -32.65%, smaller than the maximum MAMEX drawdown of -42.17%. Use the drawdown chart below to compare losses from any high point for MURMX and MAMEX.

Drawdown Indicators

	MURMX	MAMEX	Difference
Max Drawdown Largest peak-to-trough decline	-32.65%	-42.17%	+9.52%
Max Drawdown (1Y) Largest decline over 1 year	-10.31%	-14.16%	+3.85%
Max Drawdown (5Y) Largest decline over 5 years	-23.56%	-24.39%	+0.83%
Current Drawdown Current decline from peak	-8.34%	-8.84%	+0.50%
Average Drawdown Average peak-to-trough decline	-5.62%	-7.68%	+2.06%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.66%	4.14%	-1.48%

Volatility

MURMX vs. MAMEX - Volatility Comparison

The current volatility for Mutual of America 2045 Retirement Fund (MURMX) is 3.49%, while Mutual of America Mid-Cap Equity Index Fund (MAMEX) has a volatility of 4.62%. This indicates that MURMX 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

	MURMX	MAMEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.49%	4.62%	-1.13%
Volatility (6M) Calculated over the trailing 6-month period	8.19%	11.83%	-3.64%
Volatility (1Y) Calculated over the trailing 1-year period	15.22%	21.79%	-6.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.72%	22.02%	-5.30%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	386.54%	389.19%	-2.65%