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VITNX vs. VIIIX
Performance
Return for Risk
Drawdowns
Volatility
Dividends

VITNX vs. VIIIX

Last updated Aug 5, 2026
Documentation

VITNX (Vanguard Institutional Total Stock Market Index Fund Institutional Shares) and VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) are both mutual funds - VITNX is a Large Cap Blend Equities fund tracking the CRSP US Total Market Index, while VIIIX is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 10 years, VITNX returned 14.71%/yr vs 15.25%/yr for VIIIX. Their 0.99 correlation means they have historically moved very closely together. VITNX charges 0.03%/yr vs 0.02%/yr for VIIIX.

Performance

VITNX vs. VIIIX - Performance Comparison

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

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Returns By Period

The year-to-date returns for both stocks are quite close, with VITNX having a 12.18% return and VIIIX slightly lower at 11.76%. Both investments have delivered pretty close results over the past 10 years, with VITNX having a 14.71% annualized return and VIIIX not far ahead at 15.25%.

VITNX

1D
1.52%
1M
1.32%
6M
10.66%
YTD
12.18%
1Y
21.82%
3Y*
20.95%
5Y*
12.38%
10Y*
14.71%
ALL TIME*
10.20%

VIIIX

1D
1.49%
1M
1.63%
6M
10.49%
YTD
11.76%
1Y
21.49%
3Y*
21.28%
5Y*
13.28%
10Y*
15.25%
ALL TIME*
9.49%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

PositionAvg. Volume Value (2W)Avg. Volume Value (1M)Avg. Volume Value (3M)

VIIIX

Vanguard Institutional Index Fund Institutional Plus Shares
$0.00$0.00$0.00

VITNX

Vanguard Institutional Total Stock Market Index Fund Institutional Shares
$0.00$0.00$0.00

VITNX vs. VIIIX - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
VITNX
Vanguard Institutional Total Stock Market Index Fund Institutional Shares		12.18%17.16%25.42%26.01%-19.47%25.76%20.95%30.86%-5.60%20.52%
VIIIX
Vanguard Institutional Index Fund Institutional Plus Shares		11.76%17.87%26.29%25.79%-18.14%28.69%18.41%31.48%-4.41%21.82%

Correlation

The correlation between VITNX and VIIIX 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.

0.99

Correlation (5Y)
Shows whether the relationship held over a longer period.

0.99

Correlation (10Y)
Provides a long-term view across more market conditions.

0.99

Correlation (All Time)
Calculated using the full available price history since Aug 31, 2001

0.99

The correlation between VITNX and VIIIX has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.

VITNX vs. VIIIX - Sectors Allocation Comparison

Sectors
VITNX
VIIIX

Technology

36.1%
38.6%

Financial Services

11.7%
11.4%

Industrials

10.2%
8.5%

Healthcare

9.7%
8.9%

Consumer Cyclical

9.4%
9.5%

Communication Services

9.1%
9.9%

Consumer Defensive

4.3%
4.5%

Energy

3.2%
3.0%

Real Estate

2.3%
1.8%

Utilities

2.2%
2.2%

Basic Materials

1.9%
1.7%

Technology

VITNX
36.1%
VIIIX
38.6%

Financial Services

VITNX
11.7%
VIIIX
11.4%

Industrials

VITNX
10.2%
VIIIX
8.5%

Healthcare

VITNX
9.7%
VIIIX
8.9%

Consumer Cyclical

VITNX
9.4%
VIIIX
9.5%

Communication Services

VITNX
9.1%
VIIIX
9.9%

Consumer Defensive

VITNX
4.3%
VIIIX
4.5%

Energy

VITNX
3.2%
VIIIX
3.0%

Real Estate

VITNX
2.3%
VIIIX
1.8%

Utilities

VITNX
2.2%
VIIIX
2.2%

Basic Materials

VITNX
1.9%
VIIIX
1.7%

Compare stocks, funds, or ETFs

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Vanguard Institutional Total Stock Market Index Fund Institutional Shares

Vanguard Institutional Index Fund Institutional Plus Shares

Often compared with VITNX:
VITNX vs. FXAIXVITNX vs. VTSAXVITNX vs. VITPXVITNX vs. SPYVITNX vs. VOOVITNX vs. VFFSXVITNX vs. VFIAX
Often compared with VIIIX:
VIIIX vs. VIGIXVIIIX vs. SPYVIIIX vs. OIEJXVIIIX vs. VTSNXVIIIX vs. VTIVIIIX vs. VEMPXVIIIX vs. VFIFX

Return for Risk

VITNX vs. VIIIX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.
VITNX
VITNX Risk / Return Rank: 7575
Overall Rank
VITNX Sharpe Ratio Rank: 7474
Sharpe Ratio Rank
VITNX Sortino Ratio Rank: 7070
Sortino Ratio Rank
VITNX Omega Ratio Rank: 6868
Omega Ratio Rank
VITNX Calmar Ratio Rank: 7777
Calmar Ratio Rank
VITNX Martin Ratio Rank: 8686
Martin Ratio Rank
VIIIX
VIIIX Risk / Return Rank: 7676
Overall Rank
VIIIX Sharpe Ratio Rank: 7575
Sharpe Ratio Rank
VIIIX Sortino Ratio Rank: 7171
Sortino Ratio Rank
VIIIX Omega Ratio Rank: 7070
Omega Ratio Rank
VIIIX Calmar Ratio Rank: 7777
Calmar Ratio Rank
VIIIX Martin Ratio Rank: 8585
Martin Ratio Rank
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.

VITNX vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Institutional Total Stock Market Index Fund Institutional Shares (VITNX) 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.

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.

VITNXVIIIXDifference
Sharpe ratioReturn per unit of total volatility
1.82
1.82

-0.01

Sortino ratioReturn per unit of downside risk
2.51
2.51

0.00

Omega ratioGain probability vs. loss probability

1.32

1.33

0.00

Calmar ratioReturn relative to maximum drawdown

2.67

2.63

+0.04

Martin ratioReturn relative to average drawdown

11.53

11.29

+0.24

VITNX vs. VIIIX - Sharpe Ratio Comparison

The current VITNX Sharpe Ratio is 1.82, which is comparable to the VIIIX Sharpe Ratio of 1.82. The chart below compares the historical Sharpe Ratios of VITNX and VIIIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

VITNX vs. VIIIX - Drawdown Comparison

The maximum VITNX drawdown since its inception was -55.32%, roughly equal to the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for VITNX and VIIIX.

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Drawdown Indicators

VITNXVIIIXDifference

Max Drawdown

Largest peak-to-trough decline

-55.32%

-55.18%

-0.14%

Max Drawdown (1Y)

Largest decline over 1 year

-8.92%

-8.90%

-0.02%

Max Drawdown (3Y)

Largest decline over 3 years

-19.36%

-18.75%

-0.61%

Max Drawdown (5Y)

Largest decline over 5 years

-25.32%

-24.50%

-0.82%

Max Drawdown (10Y)

Largest decline over 10 years

-34.99%

-33.79%

-1.20%

Current Drawdown

Current decline from peak

0.00%

0.00%

0.00%

Average Drawdown

Average peak-to-trough decline

-7.31%

-9.97%

+2.66%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.06%

2.07%

-0.01%

Volatility

VITNX vs. VIIIX - Volatility Comparison

Vanguard Institutional Total Stock Market Index Fund Institutional Shares (VITNX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) have volatilities of 3.77% and 3.81%, 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.

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Volatility by Period

VITNXVIIIXDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.77%

3.81%

-0.04%

Volatility (6M)

Calculated over the trailing 6-month period

10.36%

10.20%

+0.16%

Volatility (1Y)

Calculated over the trailing 1-year period

13.12%

12.85%

+0.27%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.47%

17.02%

+0.45%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.42%

18.08%

+0.34%

VITNX vs. VIIIX - Expense Ratio Comparison

VITNX has a 0.03% 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%.

Dividends

VITNX vs. VIIIX - Dividend Comparison

VITNX's dividend yield for the trailing twelve months is around 2.27%, less than VIIIX's 2.46% yield.

PositionTTM20252024202320222021202020192018201720162015
VIIIX
Vanguard Institutional Index Fund Institutional Plus Shares		2.46%2.11%3.66%2.66%3.39%4.79%3.07%2.86%2.45%1.84%2.38%2.47%
VITNX
Vanguard Institutional Total Stock Market Index Fund Institutional Shares		2.27%2.63%4.14%2.41%6.48%5.37%11.56%2.90%3.92%1.89%2.78%2.28%

Frequently Asked Questions

With a correlation of 1.00, VITNX and VIIIX 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.

VIIIX has higher volatility (3.81%) compared to VITNX (3.77%). In terms of maximum drawdown, VITNX dropped -55.32% vs VIIIX's -55.18%.

VIIIX currently has the higher Sharpe Ratio (1.82 vs 1.82), 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.

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