AOMIX vs. AONIX

Last updated Jun 23, 2026

AOMIX (American Century Investments One Choice Portfolio: Moderate) and AONIX (American Century Investments One Choice Portfolio: Very Conservative) are both Diversified Portfolio funds from American Century. Over the past 10 years, AOMIX returned 8.14%/yr vs 4.54%/yr for AONIX. Their correlation of 0.88 suggests significant overlap in exposure. Both charge a 0.00% expense ratio.

Performance

AOMIX vs. AONIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Investments One Choice Portfolio: Moderate (AOMIX) and American Century Investments One Choice Portfolio: Very Conservative (AONIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AOMIX achieves a 6.13% return, which is significantly higher than AONIX's 2.73% return. Over the past 10 years, AOMIX has outperformed AONIX with an annualized return of 8.14%, while AONIX has yielded a comparatively lower 4.54% annualized return.

AOMIX

• 1D: 0.71%
• 1M: 1.02%
• YTD: 6.13%
• 6M: 5.93%
• 1Y: 15.50%
• 3Y*: 11.35%
• 5Y*: 5.58%
• 10Y*: 8.14%

AONIX

• 1D: 0.33%
• 1M: 0.64%
• YTD: 2.73%
• 6M: 2.73%
• 1Y: 7.93%
• 3Y*: 6.71%
• 5Y*: 2.93%
• 10Y*: 4.54%

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

AOMIX vs. AONIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AOMIX American Century Investments One Choice Portfolio: Moderate	6.13%	12.97%	10.07%	13.04%	-16.37%	11.82%	16.08%	20.14%	-5.23%	14.27%
AONIX American Century Investments One Choice Portfolio: Very Conservative	2.73%	7.52%	5.92%	7.60%	-11.35%	6.63%	9.43%	11.96%	-0.93%	6.46%

Correlation

The correlation between AOMIX and AONIX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since Oct 1, 2004	0.88

The correlation between AOMIX and AONIX has been stable across timeframes, ranging from 0.86 to 0.91 - a consistent structural relationship.

Return for Risk

AOMIX vs. AONIX — Risk / Return Rank

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

AOMIX

AOMIX Risk / Return Rank: 44
AOMIX Sharpe Ratio Rank: 44
AOMIX Sortino Ratio Rank: 43
AOMIX Omega Ratio Rank: 44
AOMIX Calmar Ratio Rank: 38
AOMIX Martin Ratio Rank: 48

AONIX

AONIX Risk / Return Rank: 51
AONIX Sharpe Ratio Rank: 52
AONIX Sortino Ratio Rank: 55
AONIX Omega Ratio Rank: 55
AONIX Calmar Ratio Rank: 39
AONIX Martin Ratio Rank: 52

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.

AOMIX vs. AONIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Investments One Choice Portfolio: Moderate (AOMIX) and American Century Investments One Choice Portfolio: Very Conservative (AONIX). 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.

	AOMIX	AONIX	Difference
Sharpe ratio: Return per unit of total volatility	1.80	1.96	-0.16
Sortino ratio: Return per unit of downside risk	2.55	2.85	-0.31
Omega ratio: Gain probability vs. loss probability	1.33	1.37	-0.04
Calmar ratio: Return relative to maximum drawdown	2.23	2.27	-0.03
Martin ratio: Return relative to average drawdown	9.43	10.02	-0.58

AOMIX vs. AONIX - Sharpe Ratio Comparison

The current AOMIX Sharpe Ratio is 1.80, which is comparable to the AONIX Sharpe Ratio of 1.96. The chart below compares the historical Sharpe Ratios of AOMIX and AONIX, 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

AOMIX vs. AONIX - Drawdown Comparison

The maximum AOMIX drawdown since its inception was -38.62%, which is greater than AONIX's maximum drawdown of -15.27%. Use the drawdown chart below to compare losses from any high point for AOMIX and AONIX.

Drawdown Indicators

	AOMIX	AONIX	Difference
Max Drawdown Largest peak-to-trough decline	-38.62%	-15.27%	-23.35%
Max Drawdown (1Y) Largest decline over 1 year	-6.91%	-3.51%	-3.40%
Max Drawdown (3Y) Largest decline over 3 years	-10.84%	-5.08%	-5.76%
Max Drawdown (5Y) Largest decline over 5 years	-23.24%	-15.27%	-7.97%
Max Drawdown (10Y) Largest decline over 10 years	-24.91%	-15.27%	-9.64%
Current Drawdown Current decline from peak	-0.35%	-0.25%	-0.10%
Average Drawdown Average peak-to-trough decline	-4.90%	-1.98%	-2.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.63%	0.79%	+0.84%

Volatility

AOMIX vs. AONIX - Volatility Comparison

American Century Investments One Choice Portfolio: Moderate (AOMIX) has a higher volatility of 3.22% compared to American Century Investments One Choice Portfolio: Very Conservative (AONIX) at 1.55%. This indicates that AOMIX's price experiences larger fluctuations and is considered to be riskier than AONIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AOMIX	AONIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.22%	1.55%	+1.67%
Volatility (6M) Calculated over the trailing 6-month period	7.02%	3.27%	+3.75%
Volatility (1Y) Calculated over the trailing 1-year period	8.57%	4.06%	+4.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.58%	5.42%	+5.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.31%	5.26%	+6.05%

AOMIX vs. AONIX - Expense Ratio Comparison

AOMIX has a 0.00% expense ratio, which is lower than AONIX's 0.00% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

AOMIX vs. AONIX - Dividend Comparison

AOMIX's dividend yield for the trailing twelve months is around 6.80%, more than AONIX's 4.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AOMIX American Century Investments One Choice Portfolio: Moderate	6.80%	6.69%	2.53%	2.29%	10.49%	9.55%	8.48%	6.61%	8.27%	2.11%	3.64%	7.11%
AONIX American Century Investments One Choice Portfolio: Very Conservative	4.46%	3.82%	3.10%	2.80%	7.19%	6.36%	3.46%	3.57%	5.83%	3.08%	2.16%	2.79%

Frequently Asked Questions

Can I hold both AOMIX and AONIX in my portfolio?

With a correlation of 0.91, AOMIX and AONIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, AOMIX or AONIX?

AOMIX has higher volatility (3.22%) compared to AONIX (1.55%). In terms of maximum drawdown, AOMIX dropped -38.62% vs AONIX's -15.27%.

Which has better risk-adjusted returns?

AONIX currently has the higher Sharpe Ratio (1.96 vs 1.80), 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.