MUROX vs. FRKMX

Last updated Jul 16, 2026

MUROX (Mutual of America 2055 Retirement Fund) and FRKMX (Fidelity Managed Retirement Income Fund Class K) are both Target Retirement Date funds. A 0.60 correlation means they provide meaningful diversification when combined. MUROX charges 0.11%/yr vs 0.35%/yr for FRKMX.

Performance

MUROX vs. FRKMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Mutual of America 2055 Retirement Fund (MUROX) and Fidelity Managed Retirement Income Fund Class K (FRKMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MUROX

• 1D: 0.46%
• 1M: -0.20%
• 6M: 7.77%
• YTD: 10.31%
• 1Y: 20.72%
• 3Y*: 15.64%
• 5Y*: 8.72%
• 10Y*: —

FRKMX

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

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

MUROX vs. FRKMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
MUROX Mutual of America 2055 Retirement Fund	10.31%	18.33%	14.65%	15.94%	-16.52%	18.58%	943.28%
FRKMX Fidelity Managed Retirement Income Fund Class K	15,640,638.04%	9.91%	4.40%	8.17%	-11.57%	2.88%	8.68%

Correlation

The correlation between MUROX and FRKMX is 0.71, 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	0.71
Correlation (3Y) Calculated over the trailing 3-year period	0.68
Correlation (5Y) Calculated over the trailing 5-year period	0.60
Correlation (All Time) Calculated using the full available price history since Jan 2, 2020	0.60

The correlation between MUROX and FRKMX shifts across timeframes, from 0.60 (5 years) to 0.71 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MUROX vs. FRKMX — Risk / Return Rank

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

MUROX

MUROX Risk / Return Rank: 69
MUROX Sharpe Ratio Rank: 64
MUROX Sortino Ratio Rank: 69
MUROX Omega Ratio Rank: 62
MUROX Calmar Ratio Rank: 69
MUROX Martin Ratio Rank: 83

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.

MUROX vs. FRKMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Mutual of America 2055 Retirement Fund (MUROX) 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.

	MUROX	FRKMX	Difference
Sharpe ratio: Return per unit of total volatility	1.75	—	—
Sortino ratio: Return per unit of downside risk	2.60	—	—
Omega ratio: Gain probability vs. loss probability	1.32	—	—
Calmar ratio: Return relative to maximum drawdown	2.52	—	—
Martin ratio: Return relative to average drawdown	11.66	—	—

Drawdowns

Drawdown Indicators

	MUROX	FRKMX	Difference
Max Drawdown Largest peak-to-trough decline	-33.58%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-8.77%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-15.72%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-23.84%	—	—
Current Drawdown Current decline from peak	-0.62%	—	—
Average Drawdown Average peak-to-trough decline	-5.48%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	1.82%	—	—

Volatility

Volatility by Period

	MUROX	FRKMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.36%	—	—
Volatility (6M) Calculated over the trailing 6-month period	9.77%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	12.68%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.60%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	375.86%	—	—

MUROX vs. FRKMX - Expense Ratio Comparison

MUROX has a 0.11% expense ratio, which is lower than FRKMX's 0.35% expense ratio.

Dividends

MUROX vs. FRKMX - Dividend Comparison

MUROX's dividend yield for the trailing twelve months is around 7.29%, 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%
MUROX Mutual of America 2055 Retirement Fund	7.29%	7.95%	6.25%	2.08%	10.92%	3.20%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MUROX and FRKMX in my portfolio?

MUROX and FRKMX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.