TWCIX vs. ACLAX

Last updated Apr 1, 2026

Compare and contrast key facts about American Century Select Fund (TWCIX) and American Century Mid Cap Value Fund A Class (ACLAX).

TWCIX is managed by American Century. It was launched on Jun 30, 1971. ACLAX is managed by American Century. It was launched on Mar 31, 2004.

Performance

TWCIX vs. ACLAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Select Fund (TWCIX) and American Century Mid Cap Value Fund A Class (ACLAX). The values are adjusted to include any dividend payments, if applicable.

TWCIX vs. ACLAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TWCIX American Century Select Fund	-12.29%	16.30%	26.15%	39.93%	-28.82%	25.47%	33.99%	36.30%	-3.54%	28.90%
ACLAX American Century Mid Cap Value Fund A Class	0.93%	8.52%	8.18%	5.93%	-1.53%	23.01%	1.44%	28.55%	-12.93%	11.31%

Returns By Period

In the year-to-date period, TWCIX achieves a -12.29% return, which is significantly lower than ACLAX's 0.93% return. Over the past 10 years, TWCIX has outperformed ACLAX with an annualized return of 14.46%, while ACLAX has yielded a comparatively lower 8.37% annualized return.

TWCIX

• 1D: -0.45%
• 1M: -8.75%
• YTD: -12.29%
• 6M: -10.54%
• 1Y: 13.57%
• 3Y*: 15.91%
• 5Y*: 9.81%
• 10Y*: 14.46%

ACLAX

• 1D: -0.34%
• 1M: -7.89%
• YTD: 0.93%
• 6M: 0.87%
• 1Y: 7.39%
• 3Y*: 7.47%
• 5Y*: 6.30%
• 10Y*: 8.37%

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

TWCIX vs. ACLAX - Expense Ratio Comparison

TWCIX has a 0.94% expense ratio, which is lower than ACLAX's 1.22% expense ratio.

ACLAX

American Century Mid Cap Value Fund A Class

TWCIX

American Century Select Fund

Return for Risk

TWCIX vs. ACLAX — Risk / Return Rank

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

TWCIX

TWCIX Risk / Return Rank: 27
TWCIX Sharpe Ratio Rank: 26
TWCIX Sortino Ratio Rank: 29
TWCIX Omega Ratio Rank: 28
TWCIX Calmar Ratio Rank: 26
TWCIX Martin Ratio Rank: 25

ACLAX

ACLAX Risk / Return Rank: 21
ACLAX Sharpe Ratio Rank: 21
ACLAX Sortino Ratio Rank: 21
ACLAX Omega Ratio Rank: 18
ACLAX Calmar Ratio Rank: 23
ACLAX Martin Ratio Rank: 23

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.

TWCIX vs. ACLAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Select Fund (TWCIX) and American Century Mid Cap Value Fund A Class (ACLAX). 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.

	TWCIX	ACLAX	Difference
Sharpe ratio Return per unit of total volatility	0.61	0.53	+0.08
Sortino ratio Return per unit of downside risk	1.03	0.87	+0.17
Omega ratio Gain probability vs. loss probability	1.14	1.11	+0.03
Calmar ratio Return relative to maximum drawdown	0.74	0.67	+0.06
Martin ratio Return relative to average drawdown	2.69	2.51	+0.18
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TWCIX vs. ACLAX - Sharpe Ratio Comparison

The current TWCIX Sharpe Ratio is 0.61, which is comparable to the ACLAX Sharpe Ratio of 0.53. The chart below compares the historical Sharpe Ratios of TWCIX and ACLAX, 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

	TWCIX	ACLAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.61	0.53	+0.08
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.46	0.43	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.69	0.48	+0.21
Sharpe Ratio (All Time) Calculated using the full available price history	0.57	0.47	+0.10

Correlation

The correlation between TWCIX and ACLAX is 0.73, 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

TWCIX vs. ACLAX - Dividend Comparison

TWCIX's dividend yield for the trailing twelve months is around 11.44%, less than ACLAX's 14.04% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TWCIX American Century Select Fund	11.44%	10.04%	3.67%	5.21%	10.36%	8.25%	6.26%	5.42%	9.05%	6.30%	3.43%	6.16%
ACLAX American Century Mid Cap Value Fund A Class	14.04%	14.24%	8.53%	5.01%	14.77%	15.72%	1.62%	1.23%	14.17%	9.25%	3.82%	10.86%

Drawdowns

TWCIX vs. ACLAX - Drawdown Comparison

The maximum TWCIX drawdown since its inception was -57.31%, which is greater than ACLAX's maximum drawdown of -51.37%. Use the drawdown chart below to compare losses from any high point for TWCIX and ACLAX.

Drawdown Indicators

	TWCIX	ACLAX	Difference
Max Drawdown Largest peak-to-trough decline	-57.31%	-51.37%	-5.94%
Max Drawdown (1Y) Largest decline over 1 year	-14.66%	-10.99%	-3.67%
Max Drawdown (5Y) Largest decline over 5 years	-31.24%	-17.55%	-13.69%
Max Drawdown (10Y) Largest decline over 10 years	-31.24%	-39.24%	+8.00%
Current Drawdown Current decline from peak	-14.66%	-8.01%	-6.65%
Average Drawdown Average peak-to-trough decline	-12.42%	-6.29%	-6.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.01%	2.95%	+1.06%

Volatility

TWCIX vs. ACLAX - Volatility Comparison

American Century Select Fund (TWCIX) has a higher volatility of 5.75% compared to American Century Mid Cap Value Fund A Class (ACLAX) at 3.69%. This indicates that TWCIX's price experiences larger fluctuations and is considered to be riskier than ACLAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TWCIX	ACLAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.75%	3.69%	+2.06%
Volatility (6M) Calculated over the trailing 6-month period	12.15%	8.51%	+3.64%
Volatility (1Y) Calculated over the trailing 1-year period	22.70%	15.58%	+7.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.43%	14.63%	+6.80%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.94%	17.48%	+3.46%