MARMX vs. FRKMX

Last updated Jul 17, 2026

MARMX (Mutual of America Retirement Income Fund) and FRKMX (Fidelity Managed Retirement Income Fund Class K) are both Target Retirement Date funds. A 0.76 correlation means they provide meaningful diversification when combined. MARMX charges 0.13%/yr vs 0.35%/yr for FRKMX.

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.

Returns By Period

MARMX

• 1D: 0.17%
• 1M: -0.03%
• 6M: 2.76%
• YTD: 3.64%
• 1Y: 9.16%
• 3Y*: 7.69%
• 5Y*: 3.05%
• 10Y*: —

FRKMX

• 1D: —
• 1M: —
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MARMX vs. FRKMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
MARMX Mutual of America Retirement Income Fund	3.64%	10.54%	5.88%	7.79%	-11.40%	3.49%	890.98%
FRKMX Fidelity Managed Retirement Income Fund Class K	15,640,638.04%	9.91%	4.40%	8.17%	-11.57%	2.88%	7.09%

Correlation

The correlation between MARMX and FRKMX is 0.77, 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	0.77
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (All Time) Calculated using the full available price history since Jun 26, 2020	0.76

The correlation between MARMX and FRKMX has been stable across timeframes, ranging from 0.76 to 0.83 - a consistent structural relationship.

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: 71
MARMX Sharpe Ratio Rank: 66
MARMX Sortino Ratio Rank: 73
MARMX Omega Ratio Rank: 68
MARMX Calmar Ratio Rank: 70
MARMX Martin Ratio Rank: 81

FRKMX

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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.

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.

	MARMX	FRKMX	Difference
Sharpe ratio: Return per unit of total volatility	1.86	—	—
Sortino ratio: Return per unit of downside risk	2.81	—	—
Omega ratio: Gain probability vs. loss probability	1.35	—	—
Calmar ratio: Return relative to maximum drawdown	2.69	—	—
Martin ratio: Return relative to average drawdown	11.86	—	—

Drawdowns

Drawdown Indicators

	MARMX	FRKMX	Difference
Max Drawdown Largest peak-to-trough decline	-16.21%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-3.92%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-5.64%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-15.94%	—	—
Current Drawdown Current decline from peak	-0.25%	—	—
Average Drawdown Average peak-to-trough decline	-4.20%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	0.85%	—	—

Volatility

Volatility by Period

	MARMX	FRKMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.36%	—	—
Volatility (6M) Calculated over the trailing 6-month period	4.58%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	5.69%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.62%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	388.97%	—	—

MARMX vs. FRKMX - Expense Ratio Comparison

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

Dividends

MARMX vs. FRKMX - Dividend Comparison

MARMX's dividend yield for the trailing twelve months is around 4.44%, less than FRKMX's 103.22% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
FRKMX Fidelity Managed Retirement Income Fund Class K	103.22%	3.11%	3.12%	2.92%	4.66%	3.65%	2.56%	1.85%
MARMX Mutual of America Retirement Income Fund	4.44%	4.32%	4.16%	1.55%	5.73%	2.03%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MARMX and FRKMX in my portfolio?

MARMX and FRKMX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.