ANOIX vs. ^GSPC

Last updated Apr 2, 2026

Compare and contrast key facts about American Century Small Cap Growth Fund (ANOIX) and S&P 500 Index (^GSPC).

ANOIX is managed by American Century. It was launched on Jun 1, 2001.

Performance

ANOIX vs. ^GSPC - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Small Cap Growth Fund (ANOIX) and S&P 500 Index (^GSPC). The values are adjusted to include any dividend payments, if applicable.

ANOIX vs. ^GSPC - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ANOIX American Century Small Cap Growth Fund	-3.22%	9.00%	14.90%	17.13%	-26.41%	7.80%	51.07%	36.75%	-4.84%	25.83%
^GSPC S&P 500 Index	-3.95%	16.39%	23.31%	24.23%	-19.44%	26.89%	16.26%	28.88%	-6.24%	19.42%

Returns By Period

In the year-to-date period, ANOIX achieves a -3.22% return, which is significantly higher than ^GSPC's -3.95% return. Both investments have delivered pretty close results over the past 10 years, with ANOIX having a 12.69% annualized return and ^GSPC not far behind at 12.24%.

ANOIX

• 1D: 4.53%
• 1M: -6.78%
• YTD: -3.22%
• 6M: -0.55%
• 1Y: 15.10%
• 3Y*: 9.55%
• 5Y*: 1.68%
• 10Y*: 12.69%

^GSPC

• 1D: 0.72%
• 1M: -4.45%
• YTD: -3.95%
• 6M: -2.02%
• 1Y: 16.73%
• 3Y*: 16.96%
• 5Y*: 10.34%
• 10Y*: 12.24%

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

Return for Risk

ANOIX vs. ^GSPC — Risk / Return Rank

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

ANOIX

ANOIX Risk / Return Rank: 27
ANOIX Sharpe Ratio Rank: 22
ANOIX Sortino Ratio Rank: 26
ANOIX Omega Ratio Rank: 21
ANOIX Calmar Ratio Rank: 35
ANOIX Martin Ratio Rank: 34

^GSPC

^GSPC Risk / Return Rank: 67
^GSPC Sharpe Ratio Rank: 63
^GSPC Sortino Ratio Rank: 64
^GSPC Omega Ratio Rank: 69
^GSPC Calmar Ratio Rank: 60
^GSPC Martin Ratio Rank: 77

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.

ANOIX vs. ^GSPC - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Small Cap Growth Fund (ANOIX) and S&P 500 Index (^GSPC). 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.

	ANOIX	^GSPC	Difference
Sharpe ratio Return per unit of total volatility	0.63	0.92	-0.29
Sortino ratio Return per unit of downside risk	1.06	1.41	-0.35
Omega ratio Gain probability vs. loss probability	1.13	1.21	-0.08
Calmar ratio Return relative to maximum drawdown	1.03	1.41	-0.38
Martin ratio Return relative to average drawdown	3.84	6.61	-2.77
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ANOIX vs. ^GSPC - Sharpe Ratio Comparison

The current ANOIX Sharpe Ratio is 0.63, which is lower than the ^GSPC Sharpe Ratio of 0.92. The chart below compares the historical Sharpe Ratios of ANOIX and ^GSPC, 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

	ANOIX	^GSPC	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.63	0.92	-0.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.07	0.61	-0.54
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.55	0.68	-0.13
Sharpe Ratio (All Time) Calculated using the full available price history	0.40	0.46	-0.06

Correlation

The correlation between ANOIX and ^GSPC is 0.84, 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.

Drawdowns

ANOIX vs. ^GSPC - Drawdown Comparison

The maximum ANOIX drawdown since its inception was -59.47%, roughly equal to the maximum ^GSPC drawdown of -56.78%. Use the drawdown chart below to compare losses from any high point for ANOIX and ^GSPC.

Drawdown Indicators

	ANOIX	^GSPC	Difference
Max Drawdown Largest peak-to-trough decline	-59.47%	-56.78%	-2.69%
Max Drawdown (1Y) Largest decline over 1 year	-13.86%	-12.14%	-1.72%
Max Drawdown (5Y) Largest decline over 5 years	-37.15%	-25.43%	-11.72%
Max Drawdown (10Y) Largest decline over 10 years	-39.07%	-33.92%	-5.15%
Current Drawdown Current decline from peak	-8.53%	-5.78%	-2.75%
Average Drawdown Average peak-to-trough decline	-12.06%	-10.75%	-1.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.72%	2.60%	+1.12%

Volatility

ANOIX vs. ^GSPC - Volatility Comparison

American Century Small Cap Growth Fund (ANOIX) has a higher volatility of 9.03% compared to S&P 500 Index (^GSPC) at 5.37%. This indicates that ANOIX's price experiences larger fluctuations and is considered to be riskier than ^GSPC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ANOIX	^GSPC	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.03%	5.37%	+3.66%
Volatility (6M) Calculated over the trailing 6-month period	15.13%	9.55%	+5.58%
Volatility (1Y) Calculated over the trailing 1-year period	23.93%	18.33%	+5.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.87%	16.90%	+5.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.24%	18.05%	+5.19%