ACMVX vs. VMVAX

Last updated Aug 2, 2026

ACMVX (American Century Mid Cap Value Fund) and VMVAX (Vanguard Mid-Cap Value Index Fund Admiral Shares) are both Mid Cap Value Equities funds. Over the past 10 years, ACMVX returned 9.39%/yr vs 10.77%/yr for VMVAX. Their 0.96 correlation means they have historically moved very closely together. ACMVX charges 0.97%/yr vs 0.07%/yr for VMVAX.

Performance

ACMVX vs. VMVAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Mid Cap Value Fund (ACMVX) and Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACMVX achieves a 15.57% return, which is significantly lower than VMVAX's 16.91% return. Over the past 10 years, ACMVX has underperformed VMVAX with an annualized return of 9.39%, while VMVAX has yielded a comparatively higher 10.77% annualized return.

ACMVX

• 1D: -0.70%
• 1M: 2.29%
• 6M: 10.85%
• YTD: 15.57%
• 1Y: 21.24%
• 3Y*: 11.29%
• 5Y*: 8.63%
• 10Y*: 9.39%
• ALL TIME*: 10.01%

VMVAX

• 1D: -0.33%
• 1M: 2.54%
• 6M: 12.16%
• YTD: 16.91%
• 1Y: 26.28%
• 3Y*: 15.18%
• 5Y*: 10.18%
• 10Y*: 10.77%
• ALL TIME*: 12.53%

*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)
ACMVX American Century Mid Cap Value Fund	$0.00	$0.00	$0.00
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	$0.00	$0.00	$0.00

ACMVX vs. VMVAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACMVX American Century Mid Cap Value Fund	15.57%	8.77%	8.50%	6.18%	-1.34%	23.41%	1.63%	28.89%	-12.63%	11.57%
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	16.91%	12.06%	13.63%	10.12%	-7.89%	28.77%	2.45%	28.03%	-12.44%	17.04%

Correlation

The correlation between ACMVX and VMVAX is 0.94, 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.	0.94
Correlation (3Y) Balances recent behavior with more history.	0.95
Correlation (5Y) Shows whether the relationship held over a longer period.	0.96
Correlation (10Y) Provides a long-term view across more market conditions.	0.96
Correlation (All Time) Calculated using the full available price history since Sep 27, 2011	0.96

The correlation between ACMVX and VMVAX has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

Return for Risk

ACMVX vs. VMVAX — Risk / Return Rank

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

ACMVX

ACMVX Risk / Return Rank: 70
ACMVX Sharpe Ratio Rank: 72
ACMVX Sortino Ratio Rank: 76
ACMVX Omega Ratio Rank: 69
ACMVX Calmar Ratio Rank: 73
ACMVX Martin Ratio Rank: 60

VMVAX

VMVAX Risk / Return Rank: 89
VMVAX Sharpe Ratio Rank: 89
VMVAX Sortino Ratio Rank: 87
VMVAX Omega Ratio Rank: 83
VMVAX Calmar Ratio Rank: 92
VMVAX Martin Ratio Rank: 93

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.

ACMVX vs. VMVAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Mid Cap Value Fund (ACMVX) and Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX). 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.

	ACMVX	VMVAX	Difference
Sharpe ratio: Return per unit of total volatility	1.68	2.19	-0.52
Sortino ratio: Return per unit of downside risk	2.54	3.18	-0.64
Omega ratio: Gain probability vs. loss probability	1.29	1.39	-0.09
Calmar ratio: Return relative to maximum drawdown	2.33	3.58	-1.25
Martin ratio: Return relative to average drawdown	7.62	13.96	-6.34

ACMVX vs. VMVAX - Sharpe Ratio Comparison

The current ACMVX Sharpe Ratio is 1.68, which is comparable to the VMVAX Sharpe Ratio of 2.19. The chart below compares the historical Sharpe Ratios of ACMVX and VMVAX, 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

ACMVX vs. VMVAX - Drawdown Comparison

The maximum ACMVX drawdown since its inception was -51.19%, which is greater than VMVAX's maximum drawdown of -43.07%. Use the drawdown chart below to compare losses from any high point for ACMVX and VMVAX.

Drawdown Indicators

	ACMVX	VMVAX	Difference
Max Drawdown Largest peak-to-trough decline	-51.19%	-43.07%	-8.12%
Max Drawdown (1Y) Largest decline over 1 year	-8.49%	-6.95%	-1.54%
Max Drawdown (3Y) Largest decline over 3 years	-14.57%	-18.40%	+3.83%
Max Drawdown (5Y) Largest decline over 5 years	-17.46%	-19.75%	+2.29%
Max Drawdown (10Y) Largest decline over 10 years	-39.24%	-43.07%	+3.83%
Current Drawdown Current decline from peak	-1.11%	-1.07%	-0.04%
Average Drawdown Average peak-to-trough decline	-5.89%	-4.33%	-1.56%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.59%	1.78%	+0.81%

Volatility

ACMVX vs. VMVAX - Volatility Comparison

American Century Mid Cap Value Fund (ACMVX) has a higher volatility of 3.44% compared to Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX) at 2.69%. This indicates that ACMVX's price experiences larger fluctuations and is considered to be riskier than VMVAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACMVX	VMVAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.44%	2.69%	+0.75%
Volatility (6M) Calculated over the trailing 6-month period	8.62%	8.12%	+0.50%
Volatility (1Y) Calculated over the trailing 1-year period	11.82%	11.39%	+0.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.57%	15.88%	-1.31%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.38%	18.69%	-1.31%

ACMVX vs. VMVAX - Expense Ratio Comparison

ACMVX has a 0.97% expense ratio, which is higher than VMVAX's 0.07% expense ratio.

Dividends

ACMVX vs. VMVAX - Dividend Comparison

ACMVX's dividend yield for the trailing twelve months is around 12.69%, more than VMVAX's 1.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACMVX American Century Mid Cap Value Fund	12.69%	14.46%	8.76%	5.24%	15.00%	15.95%	1.83%	1.46%	14.51%	9.49%	4.05%	11.06%
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	1.81%	2.10%	2.11%	2.26%	2.27%	1.78%	2.36%	2.08%	2.75%	1.86%	1.91%	2.04%

Frequently Asked Questions

Can I hold both ACMVX and VMVAX in my portfolio?

With a correlation of 0.94, ACMVX and VMVAX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, ACMVX or VMVAX?

ACMVX has higher volatility (3.44%) compared to VMVAX (2.69%). In terms of maximum drawdown, ACMVX dropped -51.19% vs VMVAX's -43.07%.

Which has better risk-adjusted returns?

VMVAX currently has the higher Sharpe Ratio (2.19 vs 1.68), 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.