AROIX vs. TWCGX

Last updated Jun 4, 2026

AROIX (American Century Investments One Choice 2045 Portfolio) and TWCGX (American Century Growth Fund) are both mutual funds - AROIX is a Target Retirement Date fund managed by American Century, while TWCGX is a Large Cap Growth Equities fund managed by American Century. Over the past 10 years, AROIX returned 8.92%/yr vs 17.03%/yr for TWCGX. Their correlation of 0.91 suggests significant overlap in exposure. AROIX charges 0.86%/yr vs 0.94%/yr for TWCGX.

Performance

AROIX vs. TWCGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Investments One Choice 2045 Portfolio (AROIX) and American Century Growth Fund (TWCGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AROIX achieves a 6.84% return, which is significantly lower than TWCGX's 8.57% return. Over the past 10 years, AROIX has underperformed TWCGX with an annualized return of 8.92%, while TWCGX has yielded a comparatively higher 17.03% annualized return.

AROIX

• 1D: 0.16%
• 1M: 3.05%
• YTD: 6.84%
• 6M: 7.25%
• 1Y: 17.46%
• 3Y*: 12.97%
• 5Y*: 5.99%
• 10Y*: 8.92%

TWCGX

• 1D: -0.51%
• 1M: 7.77%
• YTD: 8.57%
• 6M: 7.58%
• 1Y: 26.68%
• 3Y*: 21.99%
• 5Y*: 13.42%
• 10Y*: 17.03%

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

AROIX vs. TWCGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AROIX American Century Investments One Choice 2045 Portfolio	6.84%	14.11%	10.43%	14.33%	-17.05%	12.30%	16.40%	22.68%	-4.65%	15.45%
TWCGX American Century Growth Fund	8.57%	15.28%	26.20%	43.31%	-31.39%	27.86%	35.23%	35.39%	-1.27%	30.06%

Correlation

The correlation between AROIX and TWCGX is 0.78, 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	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.86
Correlation (All Time) Calculated using the full available price history since Sep 2, 2004	0.91

The correlation between AROIX and TWCGX shifts across timeframes, from 0.78 (1 year) to 0.91 (all time), reflecting how their relationship changes across market environments.

Return for Risk

AROIX vs. TWCGX — Risk / Return Rank

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

AROIX

AROIX Risk / Return Rank: 47
AROIX Sharpe Ratio Rank: 48
AROIX Sortino Ratio Rank: 48
AROIX Omega Ratio Rank: 49
AROIX Calmar Ratio Rank: 41
AROIX Martin Ratio Rank: 51

TWCGX

TWCGX Risk / Return Rank: 29
TWCGX Sharpe Ratio Rank: 37
TWCGX Sortino Ratio Rank: 33
TWCGX Omega Ratio Rank: 34
TWCGX Calmar Ratio Rank: 20
TWCGX Martin Ratio Rank: 21

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.

AROIX vs. TWCGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Investments One Choice 2045 Portfolio (AROIX) and American Century Growth Fund (TWCGX). 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.

	AROIX	TWCGX	Difference
Sharpe ratio: Return per unit of total volatility	2.05	1.76	+0.29
Sortino ratio: Return per unit of downside risk	2.93	2.40	+0.53
Omega ratio: Gain probability vs. loss probability	1.38	1.31	+0.08
Calmar ratio: Return relative to maximum drawdown	2.44	1.66	+0.78
Martin ratio: Return relative to average drawdown	10.51	5.50	+5.01
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AROIX vs. TWCGX - Sharpe Ratio Comparison

The current AROIX Sharpe Ratio is 2.05, which is comparable to the TWCGX Sharpe Ratio of 1.76. The chart below compares the historical Sharpe Ratios of AROIX and TWCGX, 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

	AROIX	TWCGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.05	1.76	+0.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.52	0.62	-0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.71	0.80	-0.09
Sharpe Ratio (All Time) Calculated using the full available price history	0.54	0.53	+0.01

Drawdowns

AROIX vs. TWCGX - Drawdown Comparison

The maximum AROIX drawdown since its inception was -48.96%, smaller than the maximum TWCGX drawdown of -59.60%. Use the drawdown chart below to compare losses from any high point for AROIX and TWCGX.

Drawdown Indicators

	AROIX	TWCGX	Difference
Max Drawdown Largest peak-to-trough decline	-48.96%	-59.60%	+10.64%
Max Drawdown (1Y) Largest decline over 1 year	-7.27%	-16.69%	+9.42%
Max Drawdown (3Y) Largest decline over 3 years	-11.85%	-24.20%	+12.35%
Max Drawdown (5Y) Largest decline over 5 years	-24.34%	-34.92%	+10.58%
Max Drawdown (10Y) Largest decline over 10 years	-27.72%	-34.92%	+7.20%
Current Drawdown Current decline from peak	0.00%	-0.51%	+0.51%
Average Drawdown Average peak-to-trough decline	-6.21%	-15.30%	+9.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.68%	5.01%	-3.33%

Volatility

AROIX vs. TWCGX - Volatility Comparison

The current volatility for American Century Investments One Choice 2045 Portfolio (AROIX) is 2.58%, while American Century Growth Fund (TWCGX) has a volatility of 3.44%. This indicates that AROIX experiences smaller price fluctuations and is considered to be less risky than TWCGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AROIX	TWCGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.58%	3.44%	-0.86%
Volatility (6M) Calculated over the trailing 6-month period	6.92%	11.92%	-5.00%
Volatility (1Y) Calculated over the trailing 1-year period	8.66%	15.72%	-7.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.65%	21.59%	-9.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.63%	21.31%	-8.68%

AROIX vs. TWCGX - Expense Ratio Comparison

AROIX has a 0.86% expense ratio, which is lower than TWCGX's 0.94% expense ratio.

Dividends

AROIX vs. TWCGX - Dividend Comparison

AROIX's dividend yield for the trailing twelve months is around 11.38%, less than TWCGX's 15.79% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AROIX American Century Investments One Choice 2045 Portfolio	11.38%	12.16%	4.90%	2.20%	5.83%	7.55%	6.26%	9.02%	11.33%	1.59%	4.04%	8.02%
TWCGX American Century Growth Fund	15.79%	17.14%	5.96%	4.81%	4.86%	9.83%	5.33%	5.60%	14.07%	10.28%	4.64%	6.80%

Frequently Asked Questions

Can I hold both AROIX and TWCGX in my portfolio?

AROIX and TWCGX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AROIX or TWCGX?

TWCGX has higher volatility (3.44%) compared to AROIX (2.58%). In terms of maximum drawdown, AROIX dropped -48.96% vs TWCGX's -59.60%.

Which has better risk-adjusted returns?

AROIX currently has the higher Sharpe Ratio (2.05 vs 1.76), 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.