MARMX vs. FRKMX

Last updated Apr 1, 2026

Compare and contrast key facts about Mutual of America Retirement Income Fund (MARMX) and Fidelity Managed Retirement Income Fund Class K (FRKMX).

MARMX is managed by Mutual of America. It was launched on Nov 29, 2021. FRKMX is managed by BlackRock. It was launched on Aug 1, 2019.

Performance

MARMX vs. FRKMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Mutual of America Retirement Income Fund (MARMX) and Fidelity Managed Retirement Income Fund Class K (FRKMX). The values are adjusted to include any dividend payments, if applicable.

MARMX vs. FRKMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
MARMX Mutual of America Retirement Income Fund	-1.88%	10.54%	5.88%	7.79%	-11.40%	3.49%	890.98%
FRKMX Fidelity Managed Retirement Income Fund Class K	-0.48%	9.91%	4.40%	8.17%	-11.57%	2.88%	7.36%

Returns By Period

In the year-to-date period, MARMX achieves a -1.88% return, which is significantly lower than FRKMX's -0.48% return.

MARMX

• 1D: -0.26%
• 1M: -3.84%
• YTD: -1.88%
• 6M: -0.21%
• 1Y: 7.50%
• 3Y*: 6.21%
• 5Y*: 2.53%
• 10Y*: —

FRKMX

• 1D: 0.26%
• 1M: -3.17%
• YTD: -0.48%
• 6M: 0.79%
• 1Y: 7.15%
• 3Y*: 6.03%
• 5Y*: 2.48%
• 10Y*: —

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

MARMX vs. FRKMX - Expense Ratio Comparison

MARMX has a 0.13% expense ratio, which is lower than FRKMX's 0.35% expense ratio.

FRKMX

Fidelity Managed Retirement Income Fund Class K

MARMX

Mutual of America Retirement Income Fund

Return for Risk

MARMX vs. FRKMX — Risk / Return Rank

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

MARMX

MARMX Risk / Return Rank: 70
MARMX Sharpe Ratio Rank: 76
MARMX Sortino Ratio Rank: 81
MARMX Omega Ratio Rank: 74
MARMX Calmar Ratio Rank: 57
MARMX Martin Ratio Rank: 61

FRKMX

FRKMX Risk / Return Rank: 83
FRKMX Sharpe Ratio Rank: 83
FRKMX Sortino Ratio Rank: 83
FRKMX Omega Ratio Rank: 80
FRKMX Calmar Ratio Rank: 85
FRKMX Martin Ratio Rank: 84

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.

MARMX vs. FRKMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Mutual of America Retirement Income Fund (MARMX) and Fidelity Managed Retirement Income Fund Class K (FRKMX). 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.

	MARMX	FRKMX	Difference
Sharpe ratio Return per unit of total volatility	1.40	1.59	-0.19
Sortino ratio Return per unit of downside risk	2.08	2.20	-0.13
Omega ratio Gain probability vs. loss probability	1.28	1.32	-0.03
Calmar ratio Return relative to maximum drawdown	1.38	2.13	-0.74
Martin ratio Return relative to average drawdown	5.92	8.58	-2.66
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MARMX vs. FRKMX - Sharpe Ratio Comparison

The current MARMX Sharpe Ratio is 1.40, which is comparable to the FRKMX Sharpe Ratio of 1.59. The chart below compares the historical Sharpe Ratios of MARMX and FRKMX, 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

	MARMX	FRKMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.40	1.59	-0.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.38	0.48	-0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.15	0.69	-0.54

Correlation

The correlation between MARMX and FRKMX is 0.75, 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

MARMX vs. FRKMX - Dividend Comparison

MARMX's dividend yield for the trailing twelve months is around 4.40%, more than FRKMX's 3.27% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019
MARMX Mutual of America Retirement Income Fund	4.40%	4.32%	4.16%	1.55%	5.73%	2.03%	0.00%	0.00%
FRKMX Fidelity Managed Retirement Income Fund Class K	3.27%	3.11%	3.12%	2.92%	4.66%	3.65%	2.56%	1.85%

Drawdowns

MARMX vs. FRKMX - Drawdown Comparison

The maximum MARMX drawdown since its inception was -16.21%, roughly equal to the maximum FRKMX drawdown of -16.04%. Use the drawdown chart below to compare losses from any high point for MARMX and FRKMX.

Drawdown Indicators

	MARMX	FRKMX	Difference
Max Drawdown Largest peak-to-trough decline	-16.21%	-16.04%	-0.17%
Max Drawdown (1Y) Largest decline over 1 year	-4.10%	-3.42%	-0.68%
Max Drawdown (5Y) Largest decline over 5 years	-15.94%	-16.04%	+0.10%
Current Drawdown Current decline from peak	-3.92%	-3.17%	-0.75%
Average Drawdown Average peak-to-trough decline	-4.41%	-3.64%	-0.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.14%	0.85%	+0.29%

Volatility

MARMX vs. FRKMX - Volatility Comparison

The current volatility for Mutual of America Retirement Income Fund (MARMX) is 1.55%, while Fidelity Managed Retirement Income Fund Class K (FRKMX) has a volatility of 1.96%. This indicates that MARMX experiences smaller price fluctuations and is considered to be less risky than FRKMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MARMX	FRKMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.55%	1.96%	-0.41%
Volatility (6M) Calculated over the trailing 6-month period	3.55%	2.86%	+0.69%
Volatility (1Y) Calculated over the trailing 1-year period	6.11%	4.58%	+1.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.50%	5.22%	+2.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	399.92%	5.13%	+394.79%