AOVIX vs. VOO

Last updated Apr 1, 2026

Compare and contrast key facts about American Century Investments One Choice Portfolio: Very Aggressive (AOVIX) and Vanguard S&P 500 ETF (VOO).

AOVIX is managed by American Century. It was launched on Sep 29, 2004. VOO is a passively managed fund by Vanguard that tracks the performance of the S&P 500 Index. It was launched on Sep 7, 2010.

Performance

AOVIX vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Investments One Choice Portfolio: Very Aggressive (AOVIX) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

AOVIX vs. VOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AOVIX American Century Investments One Choice Portfolio: Very Aggressive	-5.00%	17.35%	14.44%	17.31%	-19.64%	15.85%	21.15%	27.57%	-8.09%	20.64%
VOO Vanguard S&P 500 ETF	-4.42%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	21.77%

Returns By Period

In the year-to-date period, AOVIX achieves a -5.00% return, which is significantly lower than VOO's -4.42% return. Over the past 10 years, AOVIX has underperformed VOO with an annualized return of 9.89%, while VOO has yielded a comparatively higher 14.05% annualized return.

AOVIX

• 1D: -0.30%
• 1M: -9.64%
• YTD: -5.00%
• 6M: -3.02%
• 1Y: 13.59%
• 3Y*: 11.92%
• 5Y*: 5.86%
• 10Y*: 9.89%

VOO

• 1D: 2.86%
• 1M: -5.01%
• YTD: -4.42%
• 6M: -1.84%
• 1Y: 17.67%
• 3Y*: 18.27%
• 5Y*: 11.75%
• 10Y*: 14.05%

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

AOVIX vs. VOO - Expense Ratio Comparison

AOVIX has a 0.00% expense ratio, which is lower than VOO's 0.03% 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%.

VOO

Vanguard S&P 500 ETF

AOVIX

American Century Investments One Choice Portfolio: Very Aggressive

Return for Risk

AOVIX vs. VOO — Risk / Return Rank

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

AOVIX

AOVIX Risk / Return Rank: 40
AOVIX Sharpe Ratio Rank: 39
AOVIX Sortino Ratio Rank: 39
AOVIX Omega Ratio Rank: 40
AOVIX Calmar Ratio Rank: 38
AOVIX Martin Ratio Rank: 43

VOO

VOO Risk / Return Rank: 65
VOO Sharpe Ratio Rank: 59
VOO Sortino Ratio Rank: 62
VOO Omega Ratio Rank: 66
VOO Calmar Ratio Rank: 65
VOO Martin Ratio Rank: 75

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.

AOVIX vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Investments One Choice Portfolio: Very Aggressive (AOVIX) and Vanguard S&P 500 ETF (VOO). 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.

	AOVIX	VOO	Difference
Sharpe ratio Return per unit of total volatility	0.81	0.98	-0.17
Sortino ratio Return per unit of downside risk	1.23	1.50	-0.27
Omega ratio Gain probability vs. loss probability	1.18	1.23	-0.05
Calmar ratio Return relative to maximum drawdown	1.00	1.53	-0.53
Martin ratio Return relative to average drawdown	4.42	7.29	-2.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AOVIX vs. VOO - Sharpe Ratio Comparison

The current AOVIX Sharpe Ratio is 0.81, which is comparable to the VOO Sharpe Ratio of 0.98. The chart below compares the historical Sharpe Ratios of AOVIX and VOO, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	AOVIX	VOO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.81	0.98	-0.17
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.37	0.70	-0.33
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	0.78	-0.20
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.83	-0.38

Correlation

The correlation between AOVIX and VOO is 0.95, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

AOVIX vs. VOO - Dividend Comparison

AOVIX's dividend yield for the trailing twelve months is around 8.64%, more than VOO's 1.19% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AOVIX American Century Investments One Choice Portfolio: Very Aggressive	8.64%	8.21%	1.98%	1.59%	12.63%	9.86%	8.31%	9.10%	10.18%	1.81%	4.63%	13.85%
VOO Vanguard S&P 500 ETF	1.19%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%

Drawdowns

AOVIX vs. VOO - Drawdown Comparison

The maximum AOVIX drawdown since its inception was -54.18%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for AOVIX and VOO.

Drawdown Indicators

	AOVIX	VOO	Difference
Max Drawdown Largest peak-to-trough decline	-54.18%	-33.99%	-20.19%
Max Drawdown (1Y) Largest decline over 1 year	-11.71%	-11.98%	+0.27%
Max Drawdown (5Y) Largest decline over 5 years	-29.07%	-24.52%	-4.55%
Max Drawdown (10Y) Largest decline over 10 years	-34.60%	-33.99%	-0.61%
Current Drawdown Current decline from peak	-10.13%	-6.29%	-3.84%
Average Drawdown Average peak-to-trough decline	-8.41%	-3.72%	-4.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.65%	2.52%	+0.13%

Volatility

AOVIX vs. VOO - Volatility Comparison

American Century Investments One Choice Portfolio: Very Aggressive (AOVIX) and Vanguard S&P 500 ETF (VOO) have volatilities of 5.24% and 5.29%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AOVIX	VOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.24%	5.29%	-0.05%
Volatility (6M) Calculated over the trailing 6-month period	9.34%	9.44%	-0.10%
Volatility (1Y) Calculated over the trailing 1-year period	16.61%	18.10%	-1.49%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.92%	16.82%	-0.90%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.14%	17.99%	-0.85%