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Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) Fund Overview

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

$9.39 -$0.06 (-0.63%)

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 18, 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 Total Bond Market Index Fund Investor Shares (VBMFX) trades at $9.39. Vanguard Total Bond Market Index Fund (VBMFX) tracks the performance of a broad range of investment-grade U.S. bonds. Sector: Unknown.

Price as of Sep 11, 2026 · Last analyzed: Mar 18, 2026
Vanguard Total Bond Market Index Fund (VBMFX) tracks the performance of a broad range of investment-grade U.S. bonds. The fund invests in government, corporate, and international dollar-denominated bonds, as well as mortgage-backed and asset-backed securities with maturities exceeding one year.

Analyst Coverage for VBMFX: VBMFX does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage. In the absence of analyst consensus, our AI model evaluates VBMFX against Unknown peers across nine fundamental dimensions and assigns a neutral fundamental signal based on the underlying data.

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

Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) Business Overview & Investment Profile

IndustryFixed Income
SectorUnknown

Vanguard Total Bond Market Index Fund mirrors the performance of the U.S. investment-grade bond market, encompassing government, corporate, and international dollar-denominated bonds. It offers investors diversified exposure to fixed-income securities, focusing on maturities greater than one year and maintaining a beta of 1.00.

Data Provenance | Financial Data Quantitative Analysis Analysis: Mar 18, 2026

What Is the Investment Thesis for VBMFX?

AI-written as of Mar 18, 2026 — figures and tone reflect the data available then, not today's score.

VBMFX offers a straightforward investment thesis centered on mirroring the performance of the broad U.S. investment-grade bond market. The fund's primary value driver is its ability to provide diversified exposure to a wide array of fixed-income securities, including government, corporate, and mortgage-backed bonds. A key growth catalyst is the continued demand for passive investment strategies, as investors seek low-cost, diversified exposure to asset classes. With a beta of 1.00, VBMFX is expected to move in line with the overall bond market. However, potential risks include interest rate fluctuations, which can impact bond values, and credit spread widening, which can negatively affect corporate bond performance.

Based on FMP financials and quantitative analysis

VBMFX Key Highlights

AI-written as of Mar 18, 2026 — figures and tone reflect the data available then, not today's score.

VBMFX tracks the Bloomberg Barclays U.S. Aggregate Float Adjusted Index, providing broad market exposure.

  • The fund invests in investment-grade bonds, mitigating credit risk.
  • VBMFX uses a sampling strategy to replicate the index, offering cost-effective management.
  • At least 80% of the fund's assets are invested in bonds held in the index, ensuring high correlation.
  • The fund's beta is 1.00, indicating its price movements generally mirror the overall bond market.

Who Are VBMFX's Competitors?

VBMFX is benchmarked below against 3 industry peers on price, market cap, and our AI MoonshotScore.

Company Price Change Market Cap MoonshotScore
AGG iShares Core U.S. Aggregate Bond ETF $95.96 -0.09% $135B
BND Vanguard Total Bond Market ETF $71.22 -0.07% $392B
FXNAX Fidelity U.S. Bond Index Fund $10.16 -0.68% $68.4B

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

What Are VBMFX's Key Strengths?

Low expense ratio

  • Broad diversification
  • Passive investment strategy
  • Strong brand reputation

What Are VBMFX's Weaknesses?

Vulnerable to interest rate risk

  • Limited upside potential compared to equities
  • Tracking error relative to the index
  • No active management to mitigate risks

What Could Drive VBMFX Stock Higher?

Potential interest rate cuts by the Federal Reserve could boost bond prices.

  • Continued demand for passive investment strategies will likely drive inflows.
  • Economic uncertainty may increase demand for fixed income assets as a safe haven.

What Are the Key Risks for VBMFX?

Rising interest rates could negatively impact bond values.

  • Credit spread widening could reduce returns on corporate bonds.
  • Inflation could erode the real value of fixed income investments.
  • Changes in the composition of the underlying index could affect fund performance.

What Are the Growth Opportunities for VBMFX?

  • Increased Adoption of Passive Investing: The ongoing shift towards passive investment strategies presents a significant growth opportunity for VBMFX. As investors increasingly prioritize low-cost, diversified exposure to asset classes, the demand for index funds like VBMFX is expected to rise. This trend is supported by the growing awareness of the challenges associated with active management and the potential for index funds to deliver competitive returns over the long term. The total market for passive investments is estimated to be in the trillions of dollars, providing a substantial runway for growth.
  • Rising Demand for Fixed Income Exposure: In periods of economic uncertainty or market volatility, investors often seek the relative safety and stability of fixed income investments. This increased demand for fixed income exposure can drive inflows into bond funds like VBMFX. As investors rebalance their portfolios to reduce risk, bond funds can benefit from increased allocations. The fixed income market is a multi-trillion dollar market, and even a small shift in asset allocation can have a significant impact on fund flows.
  • Expansion of the Underlying Index: The Bloomberg Barclays U.S. Aggregate Float Adjusted Index, which VBMFX tracks, may expand to include new types of fixed income securities or adjust its weighting methodology. These changes can enhance the diversification and representativeness of the index, making VBMFX more attractive to investors. For example, the inclusion of green bonds or other ESG-focused securities could appeal to socially responsible investors. The ongoing evolution of the fixed income market creates opportunities for the index to adapt and improve.
  • Growing Retirement Savings Market: As the global population ages and retirement savings accumulate, the demand for fixed income investments to generate income and preserve capital is expected to increase. Bond funds like VBMFX can play a key role in retirement portfolios, providing a stable source of returns and diversification away from equities. The retirement savings market is a massive and growing market, representing a significant opportunity for bond funds.
  • Technological Advancements in Trading and Portfolio Management: Technological advancements are improving the efficiency and accessibility of bond trading and portfolio management. These advancements can benefit VBMFX by reducing transaction costs, improving tracking accuracy, and enhancing the overall investor experience. For example, the use of algorithmic trading and data analytics can help the fund to optimize its portfolio and minimize deviations from the index.

What Are VBMFX's Competitive Advantages?

  • Low cost structure: VBMFX offers a competitive expense ratio, making it a noteworthy option for cost-conscious investors.
  • Brand reputation: Vanguard is a well-respected and trusted name in the investment management industry.
  • Scale: VBMFX benefits from Vanguard's large asset base, allowing it to achieve economies of scale.
  • Index tracking: The fund's passive approach provides a predictable and transparent investment strategy.

What Does VBMFX Do?

The Vanguard Total Bond Market Index Fund (VBMFX) is designed to track the performance of the Bloomberg Barclays U.S. Aggregate Float Adjusted Index, a benchmark representing a wide spectrum of public, investment-grade, taxable, fixed income securities in the United States. These securities include U.S. government, corporate, and international dollar-denominated bonds, alongside mortgage-backed and asset-backed securities. The fund focuses on bonds with maturities of more than one year, providing investors with exposure to intermediate and long-term fixed-income assets. VBMFX employs a sampling strategy, selecting investments to replicate the index's overall characteristics. At least 80% of the fund's assets are consistently invested in bonds held within the index, ensuring a high degree of correlation with the target benchmark. The fund's objective is to provide a return that closely matches the index, offering a cost-effective way to access the broad U.S. investment-grade bond market.

What Products and Services Does VBMFX Offer?

  • Tracks the performance of the Bloomberg Barclays U.S. Aggregate Float Adjusted Index.
  • Invests in a diversified portfolio of U.S. investment-grade bonds.
  • Includes government, corporate, and mortgage-backed securities.
  • Focuses on bonds with maturities of more than one year.
  • Employs a sampling strategy to replicate the index.
  • Maintains at least 80% of its assets in index bonds.

How Does VBMFX Make Money?

  • Generates revenue through management fees charged to investors.
  • Aims to replicate the performance of the underlying bond index.
  • Offers a low-cost, passive investment strategy.
  • Provides diversified exposure to the U.S. investment-grade bond market.

What Industry Does VBMFX Operate In?

VBMFX operates within the fixed income market, which is influenced by macroeconomic factors such as interest rates, inflation, and economic growth. The competitive landscape includes other bond index funds and actively managed bond funds. VBMFX's strength lies in its low-cost, passive approach, appealing to investors seeking broad market exposure. The fund's performance is closely tied to the overall health and stability of the U.S. bond market. Demand for bond funds generally increases during periods of economic uncertainty or when investors seek to diversify their portfolios.

Who Are VBMFX's Key Customers?

  • Individual investors seeking fixed income exposure.
  • Institutional investors looking for diversified bond portfolios.
  • Retirement savers seeking stable returns and capital preservation.
  • Financial advisors building client portfolios.
Model self-rating on this text: 73% (not a measure of the evidence) Updated: Mar 18, 2026

Research confidence

Low 20/100

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 · 19 snapshots

2026-08-23 46
2026-08-26 46
2026-08-29 46
2026-09-01 46
2026-09-04 46
2026-09-07 46
2026-09-10 46

What changed?

The score has stayed at 46.

Over the same 18 days the stock moved -0.5%.

VBMFX Financials

Bull Case vs Bear Case

Bull Case

  • Low expense ratio
  • Broad diversification
  • Passive investment strategy
  • Strong brand reputation

Bear Case

  • Vulnerable to interest rate risk
  • Limited upside potential compared to equities
  • Tracking error relative to the index
  • No active management to mitigate risks

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

VBMFX Latest News

VBMFX Analyst Consensus

Consensus Rating

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

Price Targets

Wall Street price target analysis for VBMFX.

VBMFX MoonshotScore

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

What Investors Ask About Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) — Unknown

Is VBMFX a good stock?

Stock Expert AI does not rate VBMFX buy, sell or hold. Vanguard Total Bond Market Index Fund Investor Shares has no MoonshotScore yet; read the financial checkup, analyst consensus and risks directly. Whether it fits is your call: check what it sells, whether it earns, what the price assumes, and what would prove you wrong.

What does Vanguard Total Bond Market Index Fund do?

Vanguard Total Bond Market Index Fund (VBMFX) is a passively managed fund designed to mirror the performance of the Bloomberg Barclays U.S. Aggregate Float Adjusted Index.

What do analysts say about VBMFX stock?

VBMFX is generally viewed as a stable and reliable investment option for those seeking broad exposure to the U.S. investment-grade bond market. Analysts often highlight its low expense ratio and strong tracking performance as key advantages. The fund's beta of 1.00 suggests that its price movements closely mirror the overall bond market.

What are the main risks for VBMFX?

The primary risk for VBMFX is interest rate risk. As interest rates rise, the value of existing bonds in the fund's portfolio can decline, leading to potential losses for investors. Another risk is credit risk, although VBMFX primarily invests in investment-grade bonds, which have a lower risk of default.

What are the key factors to evaluate for VBMFX?

Evaluate VBMFX on fundamentals, analyst consensus, and risk factors. VBMFX offers a straightforward investment thesis centered on mirroring the performance of the broad U.S. investment-grade bond market. Not financial advice.

How frequently does VBMFX data refresh on this page?

VBMFX's price was last updated on Sep 11, 2026 and refreshes on page view during U.S. market hours; the quote is a provider snapshot, not an exchange feed. Fundamentals update after quarterly filings; the MoonshotScore recalculates nightly; news aggregates continuously.

What has driven VBMFX's recent stock price performance?

Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) moves on earnings results, analyst revisions, sector rotation, and market sentiment. Notable catalyst: Low expense ratio. See the News tab for the latest drivers. Past performance does not predict future results.

Should investors consider VBMFX overvalued or undervalued right now?

Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) has no trailing P/E available here, so lean on price-to-sales and cash flow in the Financials tab. Compare P/E, P/S, and EV/EBITDA against sector peers for a full view.

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
Data Sources & Methodology
Market data powered by Financial Modeling Prep & Yahoo Finance. 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 available data and general knowledge of the fund and its underlying index.
  • Investment decisions should be based on individual circumstances and risk tolerance.
Data Sources
Financial Modeling Prep (FMP)Stock Expert AI proprietary analysis

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