VIEIX vs. VEMPX

Last updated Aug 4, 2026

VIEIX (Vanguard Extended Market Index Fund Institutional Shares) and VEMPX (Vanguard Extended Market Index Fund Institutional Plus Shares) are both Mid Cap Blend Equities funds from Vanguard tracking the Spliced Extended Market Index. Both are passively managed. Over the past 10 years, VIEIX returned 11.74%/yr vs 11.75%/yr for VEMPX. Their 1.00 correlation means they have historically moved very closely together. VIEIX charges 0.04%/yr vs 0.04%/yr for VEMPX.

Performance

VIEIX vs. VEMPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Extended Market Index Fund Institutional Shares (VIEIX) and Vanguard Extended Market Index Fund Institutional Plus Shares (VEMPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with VIEIX having a 13.51% return and VEMPX slightly higher at 13.52%. Both investments have delivered pretty close results over the past 10 years, with VIEIX having a 11.74% annualized return and VEMPX not far ahead at 11.75%.

VIEIX

• 1D: -0.41%
• 1M: -3.02%
• 6M: 10.17%
• YTD: 13.51%
• 1Y: 23.28%
• 3Y*: 15.99%
• 5Y*: 6.11%
• 10Y*: 11.74%
• ALL TIME*: 9.03%

VEMPX

• 1D: -0.41%
• 1M: -3.02%
• 6M: 10.17%
• YTD: 13.52%
• 1Y: 23.28%
• 3Y*: 16.00%
• 5Y*: 6.12%
• 10Y*: 11.75%
• ALL TIME*: 11.34%

*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)
VEMPX Vanguard Extended Market Index Fund Institutional Plus Shares	$0.00	$0.00	$0.00
VIEIX Vanguard Extended Market Index Fund Institutional Shares	$0.00	$0.00	$0.00

VIEIX vs. VEMPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VIEIX Vanguard Extended Market Index Fund Institutional Shares	13.51%	11.42%	15.49%	26.97%	-26.46%	12.46%	32.24%	28.05%	-9.36%	18.12%
VEMPX Vanguard Extended Market Index Fund Institutional Plus Shares	13.52%	11.43%	15.50%	26.98%	-26.45%	12.48%	32.24%	28.06%	-9.35%	18.13%

Correlation

The correlation between VIEIX and VEMPX is 1.00 - they have historically moved very closely together. At this level, their price movements offset little of one another.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	1.00
Correlation (3Y) Balances recent behavior with more history.	1.00
Correlation (5Y) Shows whether the relationship held over a longer period.	1.00
Correlation (10Y) Provides a long-term view across more market conditions.	1.00
Correlation (All Time) Calculated using the full available price history since Dec 13, 2010	1.00

The correlation between VIEIX and VEMPX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

VIEIX vs. VEMPX - Sectors Allocation Comparison

Sectors	VIEIX	VEMPX
Industrials	21.1%	19.6%
Technology	19.7%	19.2%
Financial Services	14.2%	13.7%
Healthcare	14.2%	13.6%
Consumer Cyclical	9.4%	8.5%
Real Estate	5.8%	5.6%
Energy	4.2%	4.3%
Basic Materials	3.9%	4.7%
Communication Services	3.1%	2.8%
Consumer Defensive	2.6%	2.6%
Utilities	1.8%	1.8%

Return for Risk

VIEIX vs. VEMPX — Risk / Return Rank

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

VIEIX

VIEIX Risk / Return Rank: 40
VIEIX Sharpe Ratio Rank: 34
VIEIX Sortino Ratio Rank: 35
VIEIX Omega Ratio Rank: 32
VIEIX Calmar Ratio Rank: 51
VIEIX Martin Ratio Rank: 45

VEMPX

VEMPX Risk / Return Rank: 39
VEMPX Sharpe Ratio Rank: 34
VEMPX Sortino Ratio Rank: 35
VEMPX Omega Ratio Rank: 31
VEMPX Calmar Ratio Rank: 51
VEMPX Martin Ratio Rank: 45

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.

VIEIX vs. VEMPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Extended Market Index Fund Institutional Shares (VIEIX) and Vanguard Extended Market Index Fund Institutional Plus Shares (VEMPX). 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.

	VIEIX	VEMPX	Difference
Sharpe ratio: Return per unit of total volatility	1.17	1.17	0.00
Sortino ratio: Return per unit of downside risk	1.72	1.72	0.00
Omega ratio: Gain probability vs. loss probability	1.21	1.21	0.00
Calmar ratio: Return relative to maximum drawdown	2.03	2.03	0.00
Martin ratio: Return relative to average drawdown	6.88	6.89	0.00

VIEIX vs. VEMPX - Sharpe Ratio Comparison

The current VIEIX Sharpe Ratio is 1.17, which is comparable to the VEMPX Sharpe Ratio of 1.17. The chart below compares the historical Sharpe Ratios of VIEIX and VEMPX, 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

VIEIX vs. VEMPX - Drawdown Comparison

The maximum VIEIX drawdown since its inception was -58.03%, which is greater than VEMPX's maximum drawdown of -41.62%. Use the drawdown chart below to compare losses from any high point for VIEIX and VEMPX.

Drawdown Indicators

	VIEIX	VEMPX	Difference
Max Drawdown Largest peak-to-trough decline	-58.03%	-41.62%	-16.41%
Max Drawdown (1Y) Largest decline over 1 year	-10.25%	-10.25%	0.00%
Max Drawdown (3Y) Largest decline over 3 years	-26.84%	-26.83%	-0.01%
Max Drawdown (5Y) Largest decline over 5 years	-36.32%	-36.32%	0.00%
Max Drawdown (10Y) Largest decline over 10 years	-41.62%	-41.62%	0.00%
Current Drawdown Current decline from peak	-4.13%	-4.13%	0.00%
Average Drawdown Average peak-to-trough decline	-13.77%	-7.90%	-5.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.02%	3.02%	0.00%

Volatility

VIEIX vs. VEMPX - Volatility Comparison

Vanguard Extended Market Index Fund Institutional Shares (VIEIX) and Vanguard Extended Market Index Fund Institutional Plus Shares (VEMPX) have volatilities of 3.88% and 3.88%, 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

	VIEIX	VEMPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.88%	3.88%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	13.31%	13.31%	0.00%
Volatility (1Y) Calculated over the trailing 1-year period	17.81%	17.81%	0.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.40%	22.40%	0.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.34%	22.34%	0.00%

VIEIX vs. VEMPX - Expense Ratio Comparison

VIEIX has a 0.04% expense ratio, which is higher than VEMPX's 0.04% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VIEIX vs. VEMPX - Dividend Comparison

VIEIX's dividend yield for the trailing twelve months is around 1.04%, which matches VEMPX's 1.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VEMPX Vanguard Extended Market Index Fund Institutional Plus Shares	1.05%	1.15%	1.11%	1.27%	1.17%	1.15%	1.09%	1.32%	1.68%	1.27%	1.46%	1.39%
VIEIX Vanguard Extended Market Index Fund Institutional Shares	1.04%	1.14%	1.10%	1.26%	1.16%	1.14%	1.08%	1.31%	1.67%	1.27%	1.45%	1.37%

Frequently Asked Questions

Can I hold both VIEIX and VEMPX in my portfolio?

With a correlation of 1.00, VIEIX and VEMPX 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, VIEIX or VEMPX?

VEMPX has higher volatility (3.88%) compared to VIEIX (3.88%). In terms of maximum drawdown, VIEIX dropped -58.03% vs VEMPX's -41.62%.

Which has better risk-adjusted returns?

VEMPX currently has the higher Sharpe Ratio (1.17 vs 1.17), 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.