FMIMX vs. VMCPX

Last updated Jun 4, 2026

FMIMX (FMI Common Stock Fund) and VMCPX (Vanguard Mid-Cap Index Fund Institutional Plus Shares) are both Mid Cap Blend Equities funds. Over the past 10 years, FMIMX returned 11.03%/yr vs 11.60%/yr for VMCPX. Their correlation of 0.89 suggests significant overlap in exposure. FMIMX charges 1.01%/yr vs 0.03%/yr for VMCPX.

Performance

FMIMX vs. VMCPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FMI Common Stock Fund (FMIMX) and Vanguard Mid-Cap Index Fund Institutional Plus Shares (VMCPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FMIMX achieves a 8.99% return, which is significantly lower than VMCPX's 10.55% return. Over the past 10 years, FMIMX has underperformed VMCPX with an annualized return of 11.03%, while VMCPX has yielded a comparatively higher 11.60% annualized return.

FMIMX

• 1D: 0.41%
• 1M: 4.03%
• YTD: 8.99%
• 6M: 8.45%
• 1Y: 11.27%
• 3Y*: 12.60%
• 5Y*: 8.72%
• 10Y*: 11.03%

VMCPX

• 1D: 0.90%
• 1M: 3.68%
• YTD: 10.55%
• 6M: 10.22%
• 1Y: 18.76%
• 3Y*: 16.85%
• 5Y*: 8.12%
• 10Y*: 11.60%

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

FMIMX vs. VMCPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FMIMX FMI Common Stock Fund	8.99%	2.12%	10.38%	24.85%	-5.95%	30.52%	5.79%	24.80%	-8.77%	13.92%
VMCPX Vanguard Mid-Cap Index Fund Institutional Plus Shares	10.55%	11.70%	14.68%	16.55%	-18.68%	24.54%	18.20%	31.06%	-9.23%	19.28%

Correlation

The correlation between FMIMX and VMCPX is 0.81, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.86
Correlation (All Time) Calculated using the full available price history since Dec 14, 2010	0.89

The correlation between FMIMX and VMCPX has been stable across timeframes, ranging from 0.81 to 0.89 - a consistent structural relationship.

Return for Risk

FMIMX vs. VMCPX — Risk / Return Rank

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

FMIMX

FMIMX Risk / Return Rank: 10
FMIMX Sharpe Ratio Rank: 10
FMIMX Sortino Ratio Rank: 11
FMIMX Omega Ratio Rank: 10
FMIMX Calmar Ratio Rank: 10
FMIMX Martin Ratio Rank: 8

VMCPX

VMCPX Risk / Return Rank: 36
VMCPX Sharpe Ratio Rank: 32
VMCPX Sortino Ratio Rank: 31
VMCPX Omega Ratio Rank: 29
VMCPX Calmar Ratio Rank: 41
VMCPX Martin Ratio Rank: 44

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.

FMIMX vs. VMCPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FMI Common Stock Fund (FMIMX) and Vanguard Mid-Cap Index Fund Institutional Plus Shares (VMCPX). 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.

	FMIMX	VMCPX	Difference
Sharpe ratio: Return per unit of total volatility	0.78	1.62	-0.83
Sortino ratio: Return per unit of downside risk	1.29	2.31	-1.02
Omega ratio: Gain probability vs. loss probability	1.15	1.28	-0.14
Calmar ratio: Return relative to maximum drawdown	0.97	2.45	-1.47
Martin ratio: Return relative to average drawdown	2.43	9.30	-6.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FMIMX vs. VMCPX - Sharpe Ratio Comparison

The current FMIMX Sharpe Ratio is 0.78, which is lower than the VMCPX Sharpe Ratio of 1.62. The chart below compares the historical Sharpe Ratios of FMIMX and VMCPX, 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

	FMIMX	VMCPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.78	1.62	-0.83
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.47	0.46	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.57	0.62	-0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	0.63	-0.11

Drawdowns

FMIMX vs. VMCPX - Drawdown Comparison

The maximum FMIMX drawdown since its inception was -59.09%, which is greater than VMCPX's maximum drawdown of -39.30%. Use the drawdown chart below to compare losses from any high point for FMIMX and VMCPX.

Drawdown Indicators

	FMIMX	VMCPX	Difference
Max Drawdown Largest peak-to-trough decline	-59.09%	-39.30%	-19.79%
Max Drawdown (1Y) Largest decline over 1 year	-13.80%	-8.13%	-5.67%
Max Drawdown (3Y) Largest decline over 3 years	-21.31%	-18.93%	-2.38%
Max Drawdown (5Y) Largest decline over 5 years	-21.31%	-27.54%	+6.23%
Max Drawdown (10Y) Largest decline over 10 years	-38.07%	-39.30%	+1.23%
Current Drawdown Current decline from peak	-4.54%	0.00%	-4.54%
Average Drawdown Average peak-to-trough decline	-10.45%	-5.22%	-5.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.52%	2.13%	+3.39%

Volatility

FMIMX vs. VMCPX - Volatility Comparison

FMI Common Stock Fund (FMIMX) has a higher volatility of 4.56% compared to Vanguard Mid-Cap Index Fund Institutional Plus Shares (VMCPX) at 2.97%. This indicates that FMIMX's price experiences larger fluctuations and is considered to be riskier than VMCPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FMIMX	VMCPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.56%	2.97%	+1.59%
Volatility (6M) Calculated over the trailing 6-month period	12.31%	9.29%	+3.02%
Volatility (1Y) Calculated over the trailing 1-year period	17.14%	12.30%	+4.84%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.66%	17.63%	+1.03%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.26%	18.92%	+0.34%

FMIMX vs. VMCPX - Expense Ratio Comparison

FMIMX has a 1.01% expense ratio, which is higher than VMCPX's 0.03% expense ratio.

Dividends

FMIMX vs. VMCPX - Dividend Comparison

FMIMX's dividend yield for the trailing twelve months is around 12.15%, more than VMCPX's 1.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FMIMX FMI Common Stock Fund	12.15%	13.24%	2.01%	2.84%	6.65%	12.44%	0.76%	4.93%	10.17%	11.82%	4.92%	10.77%
VMCPX Vanguard Mid-Cap Index Fund Institutional Plus Shares	1.36%	1.53%	1.50%	1.52%	1.61%	1.13%	1.45%	1.49%	1.84%	1.37%	1.47%	1.50%

Frequently Asked Questions

Can I hold both FMIMX and VMCPX in my portfolio?

FMIMX and VMCPX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FMIMX or VMCPX?

FMIMX has higher volatility (4.56%) compared to VMCPX (2.97%). In terms of maximum drawdown, FMIMX dropped -59.09% vs VMCPX's -39.30%.

Which has better risk-adjusted returns?

VMCPX currently has the higher Sharpe Ratio (1.62 vs 0.78), 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.