VMFVX vs. FIUSX

Last updated Jun 23, 2026

VMFVX (Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares) and FIUSX (Delaware Opportunity Fund) are both Mid Cap Value Equities funds. Over the past 10 years, VMFVX returned 10.69%/yr vs 11.14%/yr for FIUSX. Their correlation of 0.94 suggests significant overlap in exposure. VMFVX charges 0.08%/yr vs 1.15%/yr for FIUSX.

Performance

VMFVX vs. FIUSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares (VMFVX) and Delaware Opportunity Fund (FIUSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VMFVX achieves a 10.96% return, which is significantly lower than FIUSX's 18.90% return. Both investments have delivered pretty close results over the past 10 years, with VMFVX having a 10.69% annualized return and FIUSX not far ahead at 11.14%.

VMFVX

• 1D: 0.89%
• 1M: 3.13%
• YTD: 10.96%
• 6M: 8.89%
• 1Y: 22.11%
• 3Y*: 13.31%
• 5Y*: 9.31%
• 10Y*: 10.69%

FIUSX

• 1D: 0.44%
• 1M: 1.86%
• YTD: 18.90%
• 6M: 17.21%
• 1Y: 34.42%
• 3Y*: 18.83%
• 5Y*: 11.89%
• 10Y*: 11.14%

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

VMFVX vs. FIUSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VMFVX Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares	10.96%	7.57%	10.59%	16.49%	-7.03%	30.54%	3.68%	26.18%	-11.90%	12.27%
FIUSX Delaware Opportunity Fund	18.90%	12.60%	14.07%	11.68%	-9.62%	30.95%	0.88%	29.58%	-15.71%	18.67%

Correlation

The correlation between VMFVX and FIUSX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jan 3, 2011	0.94

The correlation between VMFVX and FIUSX has been stable across timeframes, ranging from 0.93 to 0.95 - a consistent structural relationship.

Return for Risk

VMFVX vs. FIUSX — Risk / Return Rank

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

VMFVX

VMFVX Risk / Return Rank: 32
VMFVX Sharpe Ratio Rank: 30
VMFVX Sortino Ratio Rank: 33
VMFVX Omega Ratio Rank: 28
VMFVX Calmar Ratio Rank: 36
VMFVX Martin Ratio Rank: 35

FIUSX

FIUSX Risk / Return Rank: 85
FIUSX Sharpe Ratio Rank: 82
FIUSX Sortino Ratio Rank: 82
FIUSX Omega Ratio Rank: 73
FIUSX Calmar Ratio Rank: 94
FIUSX Martin Ratio Rank: 94

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.

VMFVX vs. FIUSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares (VMFVX) and Delaware Opportunity Fund (FIUSX). 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.

	VMFVX	FIUSX	Difference
Sharpe ratio: Return per unit of total volatility	1.47	2.48	-1.01
Sortino ratio: Return per unit of downside risk	2.22	3.55	-1.33
Omega ratio: Gain probability vs. loss probability	1.26	1.44	-0.18
Calmar ratio: Return relative to maximum drawdown	2.13	5.17	-3.03
Martin ratio: Return relative to average drawdown	7.36	19.13	-11.77

VMFVX vs. FIUSX - Sharpe Ratio Comparison

The current VMFVX Sharpe Ratio is 1.47, which is lower than the FIUSX Sharpe Ratio of 2.48. The chart below compares the historical Sharpe Ratios of VMFVX and FIUSX, 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

VMFVX vs. FIUSX - Drawdown Comparison

The maximum VMFVX drawdown since its inception was -45.79%, smaller than the maximum FIUSX drawdown of -56.30%. Use the drawdown chart below to compare losses from any high point for VMFVX and FIUSX.

Drawdown Indicators

	VMFVX	FIUSX	Difference
Max Drawdown Largest peak-to-trough decline	-45.79%	-56.30%	+10.51%
Max Drawdown (1Y) Largest decline over 1 year	-10.52%	-6.75%	-3.77%
Max Drawdown (3Y) Largest decline over 3 years	-22.46%	-21.69%	-0.77%
Max Drawdown (5Y) Largest decline over 5 years	-22.46%	-21.69%	-0.77%
Max Drawdown (10Y) Largest decline over 10 years	-45.79%	-46.38%	+0.59%
Current Drawdown Current decline from peak	-0.97%	-1.07%	+0.10%
Average Drawdown Average peak-to-trough decline	-5.47%	-9.44%	+3.97%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.04%	1.82%	+1.22%

Volatility

VMFVX vs. FIUSX - Volatility Comparison

Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares (VMFVX) and Delaware Opportunity Fund (FIUSX) have volatilities of 4.23% and 4.37%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VMFVX	FIUSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.23%	4.37%	-0.14%
Volatility (6M) Calculated over the trailing 6-month period	10.68%	10.74%	-0.06%
Volatility (1Y) Calculated over the trailing 1-year period	15.25%	14.06%	+1.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.45%	18.18%	+1.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.89%	20.59%	+1.30%

VMFVX vs. FIUSX - Expense Ratio Comparison

VMFVX has a 0.08% expense ratio, which is lower than FIUSX's 1.15% expense ratio.

Dividends

VMFVX vs. FIUSX - Dividend Comparison

VMFVX's dividend yield for the trailing twelve months is around 1.70%, less than FIUSX's 9.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIUSX Delaware Opportunity Fund	9.70%	11.53%	12.68%	2.85%	8.96%	5.62%	1.60%	40.65%	12.11%	6.00%	4.23%	1.14%
VMFVX Vanguard S&P Mid-Cap 400 Value Index Fund Institutional Shares	1.70%	1.88%	1.81%	1.58%	2.04%	1.81%	2.48%	1.94%	2.01%	1.56%	1.42%	1.73%

Frequently Asked Questions

Can I hold both VMFVX and FIUSX in my portfolio?

With a correlation of 0.93, VMFVX and FIUSX 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, VMFVX or FIUSX?

FIUSX has higher volatility (4.37%) compared to VMFVX (4.23%). In terms of maximum drawdown, VMFVX dropped -45.79% vs FIUSX's -56.30%.

Which has better risk-adjusted returns?

FIUSX currently has the higher Sharpe Ratio (2.48 vs 1.47), 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.