ACLAX vs. NAMAX

Last updated Aug 1, 2026

ACLAX (American Century Mid Cap Value Fund A Class) and NAMAX (Columbia Select Mid Cap Value Fund) are both Mid Cap Value Equities funds. Over the past 10 years, ACLAX returned 9.10%/yr vs 11.45%/yr for NAMAX. Their correlation of 0.94 means they have usually moved in the same direction. ACLAX charges 1.22%/yr vs 0.88%/yr for NAMAX.

Performance

ACLAX vs. NAMAX - Performance Comparison

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

Returns By Period

In the year-to-date period, ACLAX achieves a 15.36% return, which is significantly lower than NAMAX's 25.51% return. Over the past 10 years, ACLAX has underperformed NAMAX with an annualized return of 9.10%, while NAMAX has yielded a comparatively higher 11.45% annualized return.

ACLAX

• 1D: -0.76%
• 1M: 2.24%
• 6M: 10.70%
• YTD: 15.36%
• 1Y: 20.95%
• 3Y*: 11.01%
• 5Y*: 8.35%
• 10Y*: 9.10%
• ALL TIME*: 9.06%

NAMAX

• 1D: 0.00%
• 1M: 1.47%
• 6M: 19.86%
• YTD: 25.51%
• 1Y: 37.74%
• 3Y*: 18.16%
• 5Y*: 12.37%
• 10Y*: 11.45%
• ALL TIME*: 10.10%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
ACLAX American Century Mid Cap Value Fund A Class	$0.00	$0.00	$0.00
NAMAX Columbia Select Mid Cap Value Fund	$0.00	$0.00	$0.00

ACLAX vs. NAMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACLAX American Century Mid Cap Value Fund A Class	15.36%	8.52%	8.18%	5.93%	-1.53%	23.01%	1.44%	28.55%	-12.93%	11.31%
NAMAX Columbia Select Mid Cap Value Fund	25.51%	13.77%	13.14%	9.65%	-9.33%	32.28%	6.90%	31.56%	-18.46%	13.71%

Correlation

The correlation between ACLAX and NAMAX is 0.83, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.83
Correlation (3Y) Balances recent behavior with more history.	0.87
Correlation (5Y) Shows whether the relationship held over a longer period.	0.90
Correlation (10Y) Provides a long-term view across more market conditions.	0.92
Correlation (All Time) Calculated using the full available price history since Jan 13, 2005	0.94

The correlation between ACLAX and NAMAX shifts across timeframes, from 0.83 (1 year) to 0.94 (all time), reflecting how their relationship changes across market environments.

Return for Risk

ACLAX vs. NAMAX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

ACLAX

ACLAX Risk / Return Rank: 68
ACLAX Sharpe Ratio Rank: 71
ACLAX Sortino Ratio Rank: 74
ACLAX Omega Ratio Rank: 67
ACLAX Calmar Ratio Rank: 71
ACLAX Martin Ratio Rank: 57

NAMAX

NAMAX Risk / Return Rank: 92
NAMAX Sharpe Ratio Rank: 94
NAMAX Sortino Ratio Rank: 91
NAMAX Omega Ratio Rank: 86
NAMAX Calmar Ratio Rank: 95
NAMAX Martin Ratio Rank: 96

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

ACLAX vs. NAMAX - Risk-Adjusted Trends Comparison

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

	ACLAX	NAMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.65	2.49	-0.84
Sortino ratio: Return per unit of downside risk	2.51	3.51	-1.00
Omega ratio: Gain probability vs. loss probability	1.29	1.43	-0.14
Calmar ratio: Return relative to maximum drawdown	2.29	4.14	-1.85
Martin ratio: Return relative to average drawdown	7.44	16.48	-9.04

ACLAX vs. NAMAX - Sharpe Ratio Comparison

The current ACLAX Sharpe Ratio is 1.65, which is lower than the NAMAX Sharpe Ratio of 2.49. The chart below compares the historical Sharpe Ratios of ACLAX and NAMAX, 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

ACLAX vs. NAMAX - Drawdown Comparison

The maximum ACLAX drawdown since its inception was -51.37%, smaller than the maximum NAMAX drawdown of -60.44%. Use the drawdown chart below to compare losses from any high point for ACLAX and NAMAX.

Drawdown Indicators

	ACLAX	NAMAX	Difference
Max Drawdown Largest peak-to-trough decline	-51.37%	-60.44%	+9.07%
Max Drawdown (1Y) Largest decline over 1 year	-8.50%	-8.49%	-0.01%
Max Drawdown (3Y) Largest decline over 3 years	-14.67%	-20.90%	+6.23%
Max Drawdown (5Y) Largest decline over 5 years	-17.55%	-20.90%	+3.35%
Max Drawdown (10Y) Largest decline over 10 years	-39.24%	-43.24%	+4.00%
Current Drawdown Current decline from peak	-1.17%	-1.21%	+0.04%
Average Drawdown Average peak-to-trough decline	-6.22%	-8.45%	+2.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.61%	2.14%	+0.47%

Volatility

ACLAX vs. NAMAX - Volatility Comparison

American Century Mid Cap Value Fund A Class (ACLAX) has a higher volatility of 3.40% compared to Columbia Select Mid Cap Value Fund (NAMAX) at 2.90%. This indicates that ACLAX's price experiences larger fluctuations and is considered to be riskier than NAMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACLAX	NAMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.40%	2.90%	+0.50%
Volatility (6M) Calculated over the trailing 6-month period	8.61%	10.79%	-2.18%
Volatility (1Y) Calculated over the trailing 1-year period	11.82%	14.17%	-2.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.59%	17.97%	-3.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.41%	20.00%	-2.59%

ACLAX vs. NAMAX - Expense Ratio Comparison

ACLAX has a 1.22% expense ratio, which is higher than NAMAX's 0.88% expense ratio.

Dividends

ACLAX vs. NAMAX - Dividend Comparison

ACLAX's dividend yield for the trailing twelve months is around 12.51%, more than NAMAX's 5.94% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACLAX American Century Mid Cap Value Fund A Class	12.51%	14.24%	8.53%	5.01%	14.77%	15.72%	1.62%	1.23%	14.17%	9.25%	3.82%	10.86%
NAMAX Columbia Select Mid Cap Value Fund	5.94%	6.71%	7.07%	0.74%	6.39%	8.99%	3.22%	3.38%	27.38%	21.08%	8.07%	17.05%

Frequently Asked Questions

Can I hold both ACLAX and NAMAX in my portfolio?

ACLAX and NAMAX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACLAX or NAMAX?

ACLAX has higher volatility (3.40%) compared to NAMAX (2.90%). In terms of maximum drawdown, ACLAX dropped -51.37% vs NAMAX's -60.44%.

Which has better risk-adjusted returns?

NAMAX currently has the higher Sharpe Ratio (2.49 vs 1.65), 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.