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VEMPX vs. VIIIX
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Correlation

The correlation between VEMPX and VIIIX is 0.88, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.


-0.50.00.51.00.9

Performance

VEMPX vs. VIIIX - Performance Comparison

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

-5.00%0.00%5.00%10.00%15.00%20.00%SeptemberOctoberNovemberDecember2025
15.60%
11.00%
VEMPX
VIIIX

Key characteristics

Sharpe Ratio

VEMPX:

1.28

VIIIX:

1.77

Sortino Ratio

VEMPX:

1.81

VIIIX:

2.37

Omega Ratio

VEMPX:

1.23

VIIIX:

1.32

Calmar Ratio

VEMPX:

1.34

VIIIX:

2.75

Martin Ratio

VEMPX:

6.34

VIIIX:

10.90

Ulcer Index

VEMPX:

3.65%

VIIIX:

2.13%

Daily Std Dev

VEMPX:

18.11%

VIIIX:

13.13%

Max Drawdown

VEMPX:

-41.62%

VIIIX:

-55.18%

Current Drawdown

VEMPX:

-2.76%

VIIIX:

-1.21%

Returns By Period

In the year-to-date period, VEMPX achieves a 5.68% return, which is significantly higher than VIIIX's 3.30% return. Over the past 10 years, VEMPX has underperformed VIIIX with an annualized return of 10.23%, while VIIIX has yielded a comparatively higher 12.41% annualized return.


VEMPX

YTD

5.68%

1M

5.68%

6M

15.60%

1Y

26.60%

5Y*

11.30%

10Y*

10.23%

VIIIX

YTD

3.30%

1M

3.30%

6M

11.00%

1Y

25.30%

5Y*

13.09%

10Y*

12.41%

*Annualized

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.


VEMPX vs. VIIIX - Expense Ratio Comparison

VEMPX has a 0.04% expense ratio, which is higher than VIIIX's 0.02% 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%.


VEMPX
Vanguard Extended Market Index Fund Institutional Plus Shares
Expense ratio chart for VEMPX: current value at 0.04% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.04%
Expense ratio chart for VIIIX: current value at 0.02% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.02%

Risk-Adjusted Performance

VEMPX vs. VIIIX — Risk-Adjusted Performance Rank

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

VEMPX
The Risk-Adjusted Performance Rank of VEMPX is 6868
Overall Rank
The Sharpe Ratio Rank of VEMPX is 6666
Sharpe Ratio Rank
The Sortino Ratio Rank of VEMPX is 6767
Sortino Ratio Rank
The Omega Ratio Rank of VEMPX is 6262
Omega Ratio Rank
The Calmar Ratio Rank of VEMPX is 7474
Calmar Ratio Rank
The Martin Ratio Rank of VEMPX is 7070
Martin Ratio Rank

VIIIX
The Risk-Adjusted Performance Rank of VIIIX is 8686
Overall Rank
The Sharpe Ratio Rank of VIIIX is 8585
Sharpe Ratio Rank
The Sortino Ratio Rank of VIIIX is 8383
Sortino Ratio Rank
The Omega Ratio Rank of VIIIX is 8484
Omega Ratio Rank
The Calmar Ratio Rank of VIIIX is 8989
Calmar Ratio Rank
The Martin Ratio Rank of VIIIX is 8989
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

VEMPX vs. VIIIX - Risk-Adjusted Performance Comparison

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


Sharpe ratio
The chart of Sharpe ratio for VEMPX, currently valued at 1.28, compared to the broader market-1.000.001.002.003.004.001.281.77
The chart of Sortino ratio for VEMPX, currently valued at 1.81, compared to the broader market0.002.004.006.008.0010.0012.001.812.37
The chart of Omega ratio for VEMPX, currently valued at 1.23, compared to the broader market1.002.003.004.001.231.32
The chart of Calmar ratio for VEMPX, currently valued at 1.34, compared to the broader market0.005.0010.0015.0020.001.342.75
The chart of Martin ratio for VEMPX, currently valued at 6.34, compared to the broader market0.0020.0040.0060.0080.006.3410.90
VEMPX
VIIIX

The current VEMPX Sharpe Ratio is 1.28, which is comparable to the VIIIX Sharpe Ratio of 1.77. The chart below compares the historical Sharpe Ratios of VEMPX and VIIIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.


Rolling 12-month Sharpe Ratio0.001.002.003.004.00SeptemberOctoberNovemberDecember2025
1.28
1.77
VEMPX
VIIIX

Dividends

VEMPX vs. VIIIX - Dividend Comparison

VEMPX's dividend yield for the trailing twelve months is around 1.05%, less than VIIIX's 1.24% yield.


TTM20242023202220212020201920182017201620152014
VEMPX
Vanguard Extended Market Index Fund Institutional Plus Shares
1.05%1.11%1.28%1.17%1.15%1.09%1.32%1.68%1.27%1.46%1.39%1.36%
VIIIX
Vanguard Institutional Index Fund Institutional Plus Shares
1.24%1.28%1.49%1.75%1.30%1.60%1.93%2.14%1.84%2.09%2.47%2.46%

Drawdowns

VEMPX vs. VIIIX - Drawdown Comparison

The maximum VEMPX drawdown since its inception was -41.62%, smaller than the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for VEMPX and VIIIX. For additional features, visit the drawdowns tool.


-15.00%-10.00%-5.00%0.00%SeptemberOctoberNovemberDecember2025
-2.76%
-1.21%
VEMPX
VIIIX

Volatility

VEMPX vs. VIIIX - Volatility Comparison

Vanguard Extended Market Index Fund Institutional Plus Shares (VEMPX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) have volatilities of 4.63% and 4.55%, 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.


2.00%3.00%4.00%5.00%6.00%7.00%8.00%SeptemberOctoberNovemberDecember2025
4.63%
4.55%
VEMPX
VIIIX
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Disclaimer

The information contained herein does not constitute investment advice and made available for educational purposes only. Prices and returns on equities are listed without consideration of fees, commissions, taxes, penalties, or interest payable due to purchasing, holding, or selling.

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