AAATX vs. FXAIX

Last updated Jun 23, 2026

AAATX (American Funds 2010 Target Date Retirement Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - AAATX is a Target Retirement Date fund managed by American Funds, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, AAATX returned 6.17%/yr vs 15.58%/yr for FXAIX. Their correlation of 0.87 suggests significant overlap in exposure. AAATX charges 0.34%/yr vs 0.02%/yr for FXAIX.

Performance

AAATX vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds 2010 Target Date Retirement Fund (AAATX) and Fidelity 500 Index Fund (FXAIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AAATX achieves a 3.68% return, which is significantly lower than FXAIX's 10.19% return. Over the past 10 years, AAATX has underperformed FXAIX with an annualized return of 6.17%, while FXAIX has yielded a comparatively higher 15.58% annualized return.

AAATX

• 1D: 0.16%
• 1M: 0.40%
• YTD: 3.68%
• 6M: 3.81%
• 1Y: 10.86%
• 3Y*: 9.70%
• 5Y*: 5.24%
• 10Y*: 6.17%

FXAIX

• 1D: 1.09%
• 1M: 0.47%
• YTD: 10.19%
• 6M: 9.68%
• 1Y: 27.18%
• 3Y*: 20.98%
• 5Y*: 14.10%
• 10Y*: 15.58%

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

AAATX vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AAATX American Funds 2010 Target Date Retirement Fund	3.68%	12.73%	7.83%	8.44%	-9.50%	9.02%	8.84%	13.51%	-2.85%	9.97%
FXAIX Fidelity 500 Index Fund	10.19%	17.84%	25.01%	26.29%	-18.14%	28.71%	18.42%	31.48%	-4.43%	21.82%

Correlation

The correlation between AAATX and FXAIX is 0.80, 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	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.81
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since May 4, 2011	0.87

The correlation between AAATX and FXAIX has been stable across timeframes, ranging from 0.79 to 0.87 - a consistent structural relationship.

Return for Risk

AAATX vs. FXAIX — Risk / Return Rank

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

AAATX

AAATX Risk / Return Rank: 61
AAATX Sharpe Ratio Rank: 66
AAATX Sortino Ratio Rank: 69
AAATX Omega Ratio Rank: 69
AAATX Calmar Ratio Rank: 46
AAATX Martin Ratio Rank: 55

FXAIX

FXAIX Risk / Return Rank: 66
FXAIX Sharpe Ratio Rank: 64
FXAIX Sortino Ratio Rank: 59
FXAIX Omega Ratio Rank: 61
FXAIX Calmar Ratio Rank: 68
FXAIX 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.

AAATX vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds 2010 Target Date Retirement Fund (AAATX) and Fidelity 500 Index Fund (FXAIX). 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.

	AAATX	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	2.18	2.17	+0.01
Sortino ratio: Return per unit of downside risk	3.15	2.93	+0.22
Omega ratio: Gain probability vs. loss probability	1.42	1.39	+0.03
Calmar ratio: Return relative to maximum drawdown	2.47	3.04	-0.57
Martin ratio: Return relative to average drawdown	10.49	13.75	-3.26

AAATX vs. FXAIX - Sharpe Ratio Comparison

The current AAATX Sharpe Ratio is 2.18, which is comparable to the FXAIX Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of AAATX and FXAIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

AAATX vs. FXAIX - Drawdown Comparison

The maximum AAATX drawdown since its inception was -40.44%, which is greater than FXAIX's maximum drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for AAATX and FXAIX.

Drawdown Indicators

	AAATX	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-40.44%	-33.79%	-6.65%
Max Drawdown (1Y) Largest decline over 1 year	-4.42%	-8.89%	+4.47%
Max Drawdown (3Y) Largest decline over 3 years	-5.57%	-18.76%	+13.19%
Max Drawdown (5Y) Largest decline over 5 years	-14.99%	-24.50%	+9.51%
Max Drawdown (10Y) Largest decline over 10 years	-15.13%	-33.79%	+18.66%
Current Drawdown Current decline from peak	-0.47%	-1.36%	+0.89%
Average Drawdown Average peak-to-trough decline	-4.34%	-3.79%	-0.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.04%	1.96%	-0.92%

Volatility

AAATX vs. FXAIX - Volatility Comparison

The current volatility for American Funds 2010 Target Date Retirement Fund (AAATX) is 1.80%, while Fidelity 500 Index Fund (FXAIX) has a volatility of 4.77%. This indicates that AAATX experiences smaller price fluctuations and is considered to be less risky than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AAATX	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.80%	4.77%	-2.97%
Volatility (6M) Calculated over the trailing 6-month period	4.04%	9.91%	-5.87%
Volatility (1Y) Calculated over the trailing 1-year period	5.00%	12.47%	-7.47%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.55%	17.01%	-10.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.69%	18.11%	-11.42%

AAATX vs. FXAIX - Expense Ratio Comparison

AAATX has a 0.34% expense ratio, which is higher than FXAIX's 0.02% expense ratio.

Dividends

AAATX vs. FXAIX - Dividend Comparison

AAATX's dividend yield for the trailing twelve months is around 6.60%, more than FXAIX's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AAATX American Funds 2010 Target Date Retirement Fund	6.60%	6.84%	5.16%	3.53%	3.41%	3.78%	3.72%	3.48%	3.79%	2.51%	2.67%	4.60%
FXAIX Fidelity 500 Index Fund	1.04%	1.11%	1.25%	1.45%	1.69%	1.22%	1.60%	2.06%	2.72%	1.97%	2.52%	2.83%

Frequently Asked Questions

Can I hold both AAATX and FXAIX in my portfolio?

AAATX and FXAIX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AAATX or FXAIX?

FXAIX has higher volatility (4.77%) compared to AAATX (1.80%). In terms of maximum drawdown, AAATX dropped -40.44% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

AAATX currently has the higher Sharpe Ratio (2.18 vs 2.17), 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.