FATKX vs. MUROX

Last updated Jun 5, 2026

FATKX (Fidelity Freedom 2020 Fund Class K6) and MUROX (Mutual of America 2055 Retirement Fund) are both Target Retirement Date funds. Over the past 5 years, FATKX returned 5.94%/yr vs 8.51%/yr for MUROX. A 0.77 correlation means they provide meaningful diversification when combined. FATKX charges 0.42%/yr vs 0.11%/yr for MUROX.

Performance

FATKX vs. MUROX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Freedom 2020 Fund Class K6 (FATKX) and Mutual of America 2055 Retirement Fund (MUROX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FATKX achieves a 6.91% return, which is significantly lower than MUROX's 9.54% return.

FATKX

• 1D: -0.31%
• 1M: 1.76%
• YTD: 6.91%
• 6M: 7.62%
• 1Y: 16.54%
• 3Y*: 13.49%
• 5Y*: 5.94%
• 10Y*: —

MUROX

• 1D: -0.62%
• 1M: 2.67%
• YTD: 9.54%
• 6M: 9.86%
• 1Y: 23.67%
• 3Y*: 16.89%
• 5Y*: 8.51%
• 10Y*: —

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

FATKX vs. MUROX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
FATKX Fidelity Freedom 2020 Fund Class K6	6.91%	15.14%	11.68%	13.16%	-15.93%	9.13%	13.09%
MUROX Mutual of America 2055 Retirement Fund	9.54%	18.33%	14.65%	15.94%	-16.52%	18.58%	943.28%

Correlation

The correlation between FATKX and MUROX is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (All Time) Calculated using the full available price history since Jan 3, 2020	0.77

The correlation between FATKX and MUROX has been stable across timeframes, ranging from 0.76 to 0.82 - a consistent structural relationship.

Return for Risk

FATKX vs. MUROX — Risk / Return Rank

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

FATKX

FATKX Risk / Return Rank: 73
FATKX Sharpe Ratio Rank: 74
FATKX Sortino Ratio Rank: 74
FATKX Omega Ratio Rank: 75
FATKX Calmar Ratio Rank: 69
FATKX Martin Ratio Rank: 74

MUROX

MUROX Risk / Return Rank: 64
MUROX Sharpe Ratio Rank: 58
MUROX Sortino Ratio Rank: 63
MUROX Omega Ratio Rank: 56
MUROX Calmar Ratio Rank: 66
MUROX Martin Ratio Rank: 79

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.

FATKX vs. MUROX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Freedom 2020 Fund Class K6 (FATKX) and Mutual of America 2055 Retirement Fund (MUROX). 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.

	FATKX	MUROX	Difference
Sharpe ratio: Return per unit of total volatility	2.47	2.20	+0.28
Sortino ratio: Return per unit of downside risk	3.57	3.25	+0.32
Omega ratio: Gain probability vs. loss probability	1.49	1.40	+0.09
Calmar ratio: Return relative to maximum drawdown	3.15	3.04	+0.10
Martin ratio: Return relative to average drawdown	13.76	14.37	-0.61
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FATKX vs. MUROX - Sharpe Ratio Comparison

The current FATKX Sharpe Ratio is 2.47, which is comparable to the MUROX Sharpe Ratio of 2.20. The chart below compares the historical Sharpe Ratios of FATKX and MUROX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FATKX	MUROX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.47	2.20	+0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.66	0.55	+0.12
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.17	+0.66

Drawdowns

FATKX vs. MUROX - Drawdown Comparison

The maximum FATKX drawdown since its inception was -22.44%, smaller than the maximum MUROX drawdown of -33.58%. Use the drawdown chart below to compare losses from any high point for FATKX and MUROX.

Drawdown Indicators

	FATKX	MUROX	Difference
Max Drawdown Largest peak-to-trough decline	-22.44%	-33.58%	+11.14%
Max Drawdown (1Y) Largest decline over 1 year	-5.48%	-8.77%	+3.29%
Max Drawdown (3Y) Largest decline over 3 years	-7.64%	-15.72%	+8.08%
Max Drawdown (5Y) Largest decline over 5 years	-22.44%	-23.84%	+1.40%
Current Drawdown Current decline from peak	-0.31%	-0.62%	+0.31%
Average Drawdown Average peak-to-trough decline	-4.38%	-5.57%	+1.19%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.25%	1.78%	-0.53%

Volatility

FATKX vs. MUROX - Volatility Comparison

The current volatility for Fidelity Freedom 2020 Fund Class K6 (FATKX) is 2.66%, while Mutual of America 2055 Retirement Fund (MUROX) has a volatility of 3.31%. This indicates that FATKX experiences smaller price fluctuations and is considered to be less risky than MUROX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FATKX	MUROX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.66%	3.31%	-0.65%
Volatility (6M) Calculated over the trailing 6-month period	5.80%	9.74%	-3.94%
Volatility (1Y) Calculated over the trailing 1-year period	6.97%	12.14%	-5.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.01%	17.55%	-8.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.28%	379.48%	-370.20%

FATKX vs. MUROX - Expense Ratio Comparison

FATKX has a 0.42% expense ratio, which is higher than MUROX's 0.11% expense ratio.

Dividends

FATKX vs. MUROX - Dividend Comparison

FATKX's dividend yield for the trailing twelve months is around 7.93%, more than MUROX's 7.25% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FATKX Fidelity Freedom 2020 Fund Class K6	7.93%	7.70%	8.73%	2.94%	10.06%	12.30%	6.93%	6.79%	7.43%	3.18%
MUROX Mutual of America 2055 Retirement Fund	7.25%	7.95%	6.25%	2.08%	10.92%	3.20%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FATKX and MUROX in my portfolio?

FATKX and MUROX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FATKX or MUROX?

MUROX has higher volatility (3.31%) compared to FATKX (2.66%). In terms of maximum drawdown, FATKX dropped -22.44% vs MUROX's -33.58%.

Which has better risk-adjusted returns?

FATKX currently has the higher Sharpe Ratio (2.47 vs 2.20), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.