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Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) Fund Overview

Educational signal · not a buy or sell recommendation · How to read this

$618.18 +$4.56 (+0.74%)
P/E Ratio: 25.76|

P/E 25.76 means the share price is 25.76 times one year of earnings per share. Beta 1.00: the stock has moved roughly in step with the S&P 500.

Data from FMP · Methodology

For informational purposes only. Not financial advice. Machine-generated analysis by Stock Expert AI — model gemini-2.0-flash, generated Mar 16, 2026. Editorial oversight is systemic, not page-by-page. Editorially accountable: Sedat ANAK, Founder and Editor-in-Chief. Data sources: Financial Modeling Prep, Yahoo Finance, SEC EDGAR

Quick Answer

Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) trades at $618.18. Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) aims to replicate the performance of the S&P 500 index through a passive, full-replication investment strategy. Sector: Financials.

Price as of · Last analyzed: Mar 16, 2026
Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) aims to replicate the performance of the S&P 500 index through a passive, full-replication investment strategy. The fund provides investors with exposure to a substantial portion of the largest publicly traded companies in the United States.

Analyst Coverage for VIIIX: VIIIX does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage.

▶ Watch the VIIIX film Every key number, told as a short cinematic story — just press play. ~2 min

Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) Financial Services Profile

HeadquartersValley Forge, US
IPO Year1997

Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) offers institutional investors a passively managed fund designed to mirror the S&P 500's performance. Utilizing a full-replication strategy, VIIIX provides broad exposure to large-cap U.S. equities, making it a core holding for diversified portfolios seeking market-matching returns within the asset management sector.

Data Provenance | Financial Data Quantitative Analysis Analysis: Mar 16, 2026

What Is the Investment Thesis for VIIIX?

AI-written as of Mar 16, 2026 — figures and tone reflect the data available then, not today's score.

The fund's full-replication strategy ensures close tracking of the S&P 500, providing diversification across a wide range of large-cap U.S. equities. With a beta of 1.00, VIIIX's volatility is expected to align with the overall market. Key value drivers include Vanguard's reputation for low-cost investing and efficient fund management. The absence of a dividend yield may be a drawback for some income-seeking investors, but the fund's focus on capital appreciation aligns with the long-term growth potential of the S&P 500. Ongoing market trends, such as the increasing popularity of passive investing and the continued growth of the U.S. economy, support the fund's long-term prospects. Potential risks include market downturns and increased competition from other index funds.

Based on FMP financials and quantitative analysis

VIIIX Key Highlights

AI-written as of Mar 16, 2026 — figures and tone reflect the data available then, not today's score.

Market capitalization of $333.21 billion, indicating substantial assets under management and broad market exposure.

  • Beta of 1.00, suggesting the fund's volatility is expected to be similar to the overall market.
  • Full-replication strategy, ensuring close tracking of the S&P 500 index.
  • Low-cost structure, consistent with Vanguard's philosophy of providing cost-effective investment solutions.
  • Designed for institutional investors seeking a core equity holding with diversification benefits.

Who Are VIIIX's Competitors?

VIIIX is benchmarked below against 8 industry peers on price, market cap, and our AI MoonshotScore.

Company Price Change Market Cap MoonshotScore
AFMBX American Funds American Balanced Fund $39.86 +0.40% $284B —
BND Vanguard Total Bond Market ETF $69.92 -0.02% $385B —
FNPFX American Funds New Perspective Fund $75.78 +0.65% $174B —
PREIX T. Rowe Price Equity Index 500 Fund $200.39 +0.74% $41.0B —
VB Vanguard Small-Cap ETF $287.95 -0.36% $185B —
BLK BlackRock, Inc. $1052.65 -0.66% $164B 51 5-pillar
BX Blackstone Inc. $109.56 -1.96% $135B 68 5-pillar
APOS Apollo Global Management, Inc. $25.57 -0.08% $74.8B 56 5-pillar

AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance

What Are VIIIX's Key Strengths?

Low expense ratio

  • Close tracking of the S&P 500
  • Strong brand reputation of Vanguard
  • Large assets under management

What Are VIIIX's Weaknesses?

No active management, limiting potential for outperformance

  • Lack of dividend yield may be unattractive to some investors
  • Susceptible to market downturns
  • Limited flexibility in investment strategy

What Are the Key Risks for VIIIX?

Rich valuation — a P/E of 25.76 runs well above the Financial Services sector’s ~17.20x, leaving little room for a miss.

  • Market downturns and economic recessions, negatively impacting fund performance.
  • Increased competition from other index funds, potentially leading to lower fees and reduced market share.
  • Changes in the regulatory environment, potentially increasing compliance costs.
  • Risk of tracking error, although minimized by the full-replication strategy.
  • Concentration risk, as the fund's performance is heavily reliant on the performance of the S&P 500.

What Are VIIIX's Competitive Advantages?

  • Low-cost structure, providing a competitive advantage over higher-fee funds.
  • Strong brand reputation of Vanguard, known for its commitment to low-cost investing.
  • Full-replication strategy, ensuring close tracking of the S&P 500.
  • Large assets under management, providing economies of scale.

What Does VIIIX Do?

Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) is a passively managed index fund offered by Vanguard, one of the world's largest investment management companies. The fund's primary objective is to closely track the performance of the Standard & Poor's 500 Index (S&P 500), a widely recognized benchmark for large-capitalization U.S. stocks. VIIIX employs a full-replication strategy, meaning it invests in all or substantially all of the stocks included in the S&P 500, weighted in proportion to their representation in the index. This approach aims to minimize tracking error and deliver returns that closely mirror the index's performance. Vanguard, founded in 1975 by John C. Bogle, pioneered the concept of low-cost index investing. The company's philosophy centers on providing investors with simple, transparent, and cost-effective investment solutions. VIIIX embodies this philosophy by offering institutional investors a low-cost way to gain exposure to the broad U.S. equity market. The fund is designed for institutional investors seeking a core equity holding that provides diversification and market-matching returns. VIIIX is subject to certain investment limitations. With respect to 75% of its total assets, the fund may not purchase more than 10% of the outstanding voting securities of any one issuer, nor may it purchase securities of any issuer if, as a result, more than 5% of the fund’s total assets would be invested in that issuer’s securities. These limitations are in place to ensure diversification and mitigate concentration risk. The fund's investment strategy is strictly passive, meaning the fund manager does not actively select stocks or attempt to outperform the index. Instead, the fund is rebalanced periodically to maintain its alignment with the S&P 500.

What Products and Services Does VIIIX Offer?

  • Tracks the performance of the Standard & Poor’s 500 Index.
  • Provides exposure to large-capitalization U.S. stocks.
  • Employs a full-replication strategy to mirror the index.
  • Offers a low-cost investment option for institutional investors.
  • Provides diversification across a broad range of companies.
  • Rebalances periodically to maintain alignment with the S&P 500.
  • Aims to minimize tracking error and deliver market-matching returns.

How Does VIIIX Make Money?

  • Generates revenue through management fees charged to investors.
  • Operates as a passively managed index fund.
  • Focuses on minimizing expenses to maximize returns for investors.

What Industry Does VIIIX Operate In?

The asset management industry is characterized by increasing competition and a growing demand for passive investment strategies. Index funds like VIIIX have gained popularity due to their low cost, transparency, and ability to deliver market-matching returns. The S&P 500, which VIIIX tracks, represents a significant portion of the overall U.S. equity market. The competitive landscape includes other index fund providers and actively managed funds that seek to outperform the market. VIIIX's position within this landscape is defined by its low-cost structure and Vanguard's strong brand reputation.

Who Are VIIIX's Key Customers?

  • Institutional investors, such as pension funds, endowments, and foundations.
  • Large corporations seeking to invest their cash reserves.
  • Other financial institutions and investment managers.
Model self-rating on this text: 85% (not a measure of the evidence) Updated: Mar 16, 2026

Research confidence

Low

Thin evidence — scoring coverage unknown. Treat this as a starting point, not a conclusion.

  • ● Scoring coverage unknown
  • ● Price is current
  • ● No filing on record
  • ● No analyst coverage
  • ● This is a fund, not an operating company

MoonshotScore History

Recorded daily since 2026-08-23 · 41 snapshots

2026-08-23 44
2026-08-31 44
2026-09-08 44
2026-09-16 44
2026-09-24 44
2026-10-04 44

What changed?

The score has stayed at 44.

Over the same 30 days the stock moved -0.5%.

VIIIX Financials

Bull Case vs Bear Case

Bull Case

  • Low expense ratio
  • Close tracking of the S&P 500
  • Strong brand reputation of Vanguard
  • Large assets under management

Bear Case

  • No active management, limiting potential for outperformance
  • Lack of dividend yield may be unattractive to some investors
  • Susceptible to market downturns
  • Limited flexibility in investment strategy

AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · March 2026

VIIIX Latest News

No recent news available for VIIIX.

VIIIX Analyst Consensus

Consensus Rating

Aggregated Buy/Hold/Sell recommendations collected by Financial Modeling Prep for VIIIX.

Price Targets

Wall Street price target analysis for VIIIX.

VIIIX MoonshotScore

MoonshotScore is Stock Expert AI's proprietary 0-100 research rating, not a buy or sell recommendation. No MoonshotScore is published for VIIIX; grades run from A+ (80-100) to F (below 30).

Vanguard Institutional Index Fund Institutional Plus Shares Financials Stock: Key Questions Answered

What do analysts say about VIIIX stock?

As a passively managed index fund, VIIIX does not have specific analyst ratings in the same way as individual stocks. However, analysts generally view index funds tracking the S&P 500 as a core component of a diversified portfolio. Key valuation metrics are not applicable to VIIIX, as its performance is directly tied to the S&P 500.

What are the main risks for VIIIX?

The primary risk for VIIIX is market risk, as the fund's performance is directly tied to the performance of the S&P 500.

Disclaimer: This content is for informational purposes only and does not constitute investment advice. Always do your own research and consult a financial advisor.

Official Resources

Price as of Analysis updated

MoonshotScore is not published for this security.

Data Sources & Methodology
Figures come from Financial Modeling Prep (FMP). If FMP has no figure for a ticker, a price or fundamental may come from a Yahoo Finance fallback, or a price from an Alpaca fallback. SEC EDGAR is used only for filing links and company identity details (legal name, address), never for figures. AI analysis by Stock Expert AI proprietary algorithms. Technical indicators via industry-standard calculations. Last updated: .
Data Provenance
Sources: Financial Modeling Prep (FMP) — Primary · Yahoo Finance — Fallback · Alpaca — Tertiary
Last fetched:
Cache TTL: Quote 5min · Profile 7d · Financials 7d · Insider 48h
How we use AI: Numbers are pulled directly from FMP & Yahoo Finance — our AI writes the analysis, it never edits the figures.
Data provided as-is for educational purposes. Not financial advice. Methodology

Data provided for informational purposes only.

Analysis Notes
  • The information provided is based on publicly available data and sources believed to be reliable. However, no guarantee is made as to the accuracy or completeness of the information.
Data Sources
Financial Modeling Prep (FMP)Stock Expert AI proprietary analysis