Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) Stock Analysis
For informational purposes only. Not financial advice. Analysis by Sedat ANAK, Founder & Editor-in-Chief | AI-powered analysis. Data sourced from SEC filings and institutional-grade financial providers. Editorially reviewed. Not financial advice.
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) trades at $18.47. Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) is a low-cost index fund focused on U. S. mortgage-backed securities. Market cap: $17.4B, Sector: Financial services.
Price as of Aug 21, 2026 · Last analyzed: Mar 17, 2026Analyst Coverage for VMBSX: VMBSX 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 VMBSX against Financial Services peers across nine fundamental dimensions and assigns an underweight signal based on the underlying data.
VMBSX: 1/3 scored disciplines lean bearish. Dominant signal: Izzy Englander bullish.
How is this calculated? →Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) Financial Services Profile
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) offers a low-cost, passive investment strategy targeting the U.S. mortgage-backed securities market. The fund tracks the Bloomberg U.S. Mortgage Backed Securities Index, providing exposure to government-backed mortgage securities and generating monthly income for investors with a medium-term investment horizon.
What Is the Investment Thesis for VMBSX?
VMBSX offers a low-cost avenue to access the U.S. mortgage-backed securities market, tracking the Bloomberg U.S. Mortgage Backed Securities Index. With a beta of 1.10, the fund exhibits slightly higher volatility than the broader market. The primary value driver is its exposure to government-backed mortgage securities, providing a relatively safe haven in fixed income. A potential catalyst is increased demand for fixed-income investments amid economic uncertainty, driving inflows into the fund. However, a key risk is prepayment risk, where mortgage refinance activity could decrease the fund's yield. Investors seeking monthly income and a medium-term investment horizon may find VMBSX suitable for the fixed income portion of their portfolio.
Based on FMP financials and quantitative analysis
VMBSX Key Highlights
Market Cap: $16.93B indicating substantial assets under management and investor confidence.
- Beta: 1.10 suggesting slightly higher volatility compared to the overall market.
- Focus on U.S. Mortgage-Backed Securities: Provides targeted exposure to the U.S. housing market and mortgage rates.
- Low-Cost Index Fund: Offers a cost-effective way to access the mortgage-backed securities market.
- Monthly Income: Designed to provide investors with a consistent stream of monthly income.
Who Are VMBSX's Competitors?
VMBSX is benchmarked below against 8 industry peers on price, market cap, and our AI MoonshotScore.
| Company | Price | Change | Market Cap | AI Score |
|---|---|---|---|---|
| BOND PIMCO Active Bond Exchange-Traded Fund | $90.62 | -0.38% | $8.32B | 46 |
| EQPGX Fidelity Advisor Equity Growth I | $29.40 | -0.94% | $8.01B | 44 |
| FATIX Fidelity Advisor Technology I | $154.77 | +0.53% | $9.18B | 46 |
| FCNYX Fidelity Advisor Cnsv Inc Bd Z | $10.06 | +0.00% | $6.25B | 46 |
| FDCAX Fidelity Capital Trust Capital Appreciation Pt. | $54.39 | -0.20% | $8.09B | 44 |
| TPG TPG Inc. | $51.57 | -3.03% | $19.8B | 67 |
| ARCC Ares Capital Corporation | $19.78 | -0.10% | $14.2B | 79 |
| CRBG Corebridge Financial, Inc. | $31.81 | -2.33% | $14.2B | 69 |
AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance
What Are VMBSX's Key Strengths?
Low expense ratio attracts cost-conscious investors.
- Diversified exposure to U.S. mortgage-backed securities.
- Passive management strategy reduces operational costs.
- Strong brand reputation of Vanguard.
What Are VMBSX's Weaknesses?
Subject to prepayment risk, which can reduce yield.
- Limited potential for outperformance due to passive management.
- Performance tied to the U.S. housing market and interest rates.
- No active management to mitigate market downturns.
What Could Drive VMBSX Stock Higher?
Increased demand for fixed-income investments amid economic uncertainty.
- Continued growth in the U.S. housing market.
- Potential interest rate cuts by the Federal Reserve in late 2026 could boost bond prices.
What Are the Key Risks for VMBSX?
Prepayment risk due to mortgage refinance activity.
- Rising interest rates could negatively impact bond prices.
- Economic downturn could lead to increased mortgage defaults.
- Changes in government regulations affecting mortgage-backed securities.
What Are the Growth Opportunities for VMBSX?
- Increased Demand for Fixed Income: As investors seek stability amid market volatility, demand for fixed-income investments like mortgage-backed securities is expected to rise. This trend could drive inflows into VMBSX, increasing its assets under management and overall market presence. The current economic uncertainty and low-interest-rate environment create a favorable backdrop for fixed-income investments. This growth is expected to continue through 2027.
- Expansion of Mortgage-Backed Securities Market: The U.S. mortgage-backed securities market is a large and liquid market, providing ample opportunities for VMBSX to grow its portfolio. As the housing market continues to recover and mortgage origination increases, the supply of mortgage-backed securities is expected to expand, creating new investment opportunities for the fund. This expansion is projected to continue over the next 3-5 years.
- Growing Retirement Savings: As the population ages and retirement savings increase, demand for income-generating investments like mortgage-backed securities is expected to rise. VMBSX's focus on providing monthly income makes it a noteworthy option for retirees and those seeking to supplement their income. This trend is expected to continue as more individuals enter retirement age.
- Technological Advancements in Mortgage Lending: Fintech innovations are streamlining the mortgage lending process, making it easier for borrowers to obtain mortgages and increasing the volume of mortgage-backed securities available for investment. VMBSX can benefit from these advancements by accessing a wider range of mortgage-backed securities and improving its overall portfolio diversification. These advancements are expected to mature within the next 2-3 years.
- Increased Focus on ESG Investing: As environmental, social, and governance (ESG) factors become increasingly important to investors, there is a growing demand for socially responsible investments. While mortgage-backed securities may not directly address ESG concerns, VMBSX can incorporate ESG considerations into its investment process by focusing on securities that support affordable housing and community development. This trend is expected to gain momentum over the next 5 years.
What Are VMBSX's Competitive Advantages?
- Low-Cost Structure: Vanguard's reputation for low expense ratios provides a competitive advantage.
- Index Tracking: Passive management strategy reduces costs and complexity.
- Brand Reputation: Vanguard's strong brand and reputation for reliability attract investors.
- Diversification: Exposure to a broad range of mortgage-backed securities reduces risk.
What Does VMBSX Do?
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) is a passively managed index fund designed to track the performance of the Bloomberg U.S. Mortgage Backed Securities Index. The fund provides investors with exposure to a diversified portfolio of U.S. mortgage-backed pass-through securities issued by the Government National Mortgage Association (GNMA), the Federal National Mortgage Association (FNMA), and the Federal Home Loan Mortgage Corporation (FHLMC). These agencies guarantee the principal and interest payments on the underlying mortgages, reducing credit risk for investors. The fund's objective is to provide current income while maintaining a relatively stable net asset value. VMBSX is part of Vanguard's Admiral Shares, which are designed for long-term investors and offer lower expense ratios compared to other share classes. The fund is suitable for investors seeking a low-cost way to gain exposure to the U.S. mortgage market and generate monthly income. It is particularly attractive for those with a medium-term investment horizon and a focus on fixed income. The fund's performance is closely tied to the overall health of the U.S. housing market and interest rate environment. Changes in interest rates and mortgage refinance activity can impact the fund's yield and overall return. The fund was created to provide investors with a simple and efficient way to access the mortgage-backed securities market without the complexities of individual security selection and management.
What Products and Services Does VMBSX Offer?
- Invests in U.S. mortgage-backed pass-through securities.
- Tracks the performance of the Bloomberg U.S. Mortgage Backed Securities Index.
- Provides exposure to securities issued by GNMA, FNMA, and FHLMC.
- Offers a low-cost way to access the mortgage-backed securities market.
- Generates monthly income for investors.
- Manages a diversified portfolio of mortgage-backed securities.
How Does VMBSX Make Money?
- Generates revenue through management fees charged to investors.
- Aims to replicate the performance of the Bloomberg U.S. Mortgage Backed Securities Index.
- Invests in a diversified portfolio of mortgage-backed securities to minimize risk.
- Passively managed, focusing on tracking the index rather than active security selection.
What Industry Does VMBSX Operate In?
VMBSX operates within the asset management industry, specifically focusing on fixed-income investments. The fund competes with other mortgage-backed securities funds and broader fixed-income ETFs. The industry is influenced by macroeconomic factors such as interest rates, inflation, and housing market trends. The growth of the fixed-income market is driven by investors seeking stable returns and diversification. VMBSX's low-cost structure and focus on government-backed securities position it favorably in the competitive landscape. The fund's performance is closely tied to the overall health of the U.S. economy and the mortgage market.
Who Are VMBSX's Key Customers?
- Individual investors seeking fixed-income exposure.
- Retirees looking for monthly income.
- Financial advisors allocating assets for clients.
- Institutional investors seeking diversified fixed-income portfolios.
VMBSX Financials
Bull Case vs Bear Case
Bull Case
- Low expense ratio attracts cost-conscious investors.
- Diversified exposure to U.S. mortgage-backed securities.
- Passive management strategy reduces operational costs.
- Strong brand reputation of Vanguard.
Bear Case
- Subject to prepayment risk, which can reduce yield.
- Limited potential for outperformance due to passive management.
- Performance tied to the U.S. housing market and interest rates.
- No active management to mitigate market downturns.
AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · August 2026
VMBSX Latest News
No recent news available for VMBSX.
VMBSX Analyst Consensus
Consensus Rating
Aggregated Buy/Hold/Sell recommendations from Benzinga, Yahoo Finance, and Finnhub for VMBSX.
Price Targets
Wall Street price target analysis for VMBSX.
VMBSX MoonshotScore
What does this score mean?
The MoonshotScore rates VMBSX 0-100 on quantitative fundamentals — growth, financial health, valuation, momentum, and risk.
Common Questions About VMBSX (Financial Services)
What does Vanguard Mortgage-Backed Securities Index Fund Admiral Shares do?
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) is a passively managed fund that replicates the Bloomberg U.S. Mortgage Backed Securities Index. It invests in a diversified portfolio of mortgage-backed securities issued by U.S. government agencies, providing investors with exposure to the U.S. mortgage market.
What are the main risks for VMBSX?
The main risks for VMBSX include prepayment risk, interest rate risk, and credit risk. Prepayment risk arises when homeowners refinance their mortgages at lower interest rates, reducing the yield on the fund. Interest rate risk refers to the potential for bond prices to decline as interest rates rise.
How does Vanguard Mortgage-Backed Securities Index Fund Admiral Shares generate income?
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares generates income primarily from the interest payments received on the mortgage-backed securities it holds. These securities are typically backed by U.S. government agencies, ensuring a relatively stable stream of income.
What are the key factors to evaluate for VMBSX?
Evaluate VMBSX on fundamentals, analyst consensus, and risk factors. VMBSX offers a low-cost avenue to access the U.S. Not financial advice.
How frequently does VMBSX data refresh on this page?
VMBSX's price was last updated on Aug 21, 2026 and refreshes on page view during U.S. market hours — it is not a real-time exchange feed. Fundamentals update after quarterly filings; the MoonshotScore recalculates nightly; news aggregates continuously.
What has driven VMBSX's recent stock price performance?
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) moves on earnings results, analyst revisions, sector rotation, and market sentiment. Notable catalyst: Low expense ratio attracts cost-conscious investors. See the News tab for the latest drivers. Past performance does not predict future results.
Should investors consider VMBSX overvalued or undervalued right now?
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) 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.
How do I research VMBSX before investing?
Before investing in Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX), research these four areas: (1) the company's revenue model and competitive position (see Company Overview), (2) financial health through revenue growth, margins, and cash flow (see MoonshotScore), (3) analyst consensus ratings and price targets (see Analyst tab), and (4) specific risk factors that could impact the stock (see Risk Factors section).
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
Data provided for informational purposes only.
- Performance is subject to market risk and fluctuations in interest rates.
- Prepayment risk can impact the fund's yield.
- The fund's investment strategy is passive and may not outperform the index.