Morningstar

Vanguard Mortgage-Backed Securities Index Fund Institutional Shares VMBIX

Morningstar Medalist Rating
Medalist Rating as of | See Vanguard Investment Hub
  • NAV / 1-Day Return 25.18  /  +0.20 %
  • Total Assets 17.3B
  • Adj. Expense Ratio
    0.020%
  • Expense Ratio 0.040%
  • Distribution Fee Level Low
  • Share Class Type Institutional
  • Category Government Mortgage-Backed Bond
  • Credit Quality / Interest Rate Sensitivity —
  • Min. Initial Investment 5M
  • Status Open
  • TTM Yield 3.82%
  • Effective Duration 5.10 years

USD | NAV as of Jul 16, 2026 | 1-Day Return as of Jul 16, 2026, 12:11 AM GMT+0

Morningstar’s Analysis VMBIX

Will VMBIX outperform in the future?

Get our overall rating based on a fundamental assessment of the pillars below.

  • Process Pillar

    The Process Pillar is our assessment of how sensible, clearly defined, and repeatable VMBIX’s performance objective and investment process is for both security selection and portfolio construction.

  • People Pillar

    The People Pillar is our evaluation of the VMBIX management team’s experience and ability. We find that high-quality management teams deliver superior performance relative to their benchmarks and/or peers.

  • Parent Pillar

    The Parent Pillar is our rating of VMBIX’s parent organization’s priorities and whether they’re in line with investors’ interests.

null Morningstar Automated Analysis

Morningstar Automated Analysis

Summary

Vanguard Mortgage-Backed Secs Idx Instl holds a quantitatively derived Bronze Morningstar Medalist Rating. The rating reflects that it has scored better than the norm on factors Morningstar research associates with future outperformance relative to category peers.

by Morningstar Automated Analysis
Rated on Published on

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Portfolio Holdings VMBIX

More VMBIX Holdings
  • Current Portfolio Date
  • Equity Holdings —
  • Bond Holdings —
  • Other Holdings —
  • % Assets in Top 10 Holdings 2.1
Top 10 Holdings
% Portfolio Weight
Market Value USD
Sector

Mktliq 12/31/2049

4.04 725M
Cash and Equivalents

Government National Mortgage Association 5.5%

0.58 104M
Securitized

Federal National Mortgage Association 5.26923%

0.44 80M
Securitized

Federal National Mortgage Association 5.5%

0.41 73M
Securitized

Government National Mortgage Association

0.30 54M
Securitized

Government National Mortgage Association

0.29 53M
Securitized

Government National Mortgage Association 5.5%

0.28 51M
Securitized

Federal National Mortgage Association

0.28 49M
Securitized

Government National Mortgage Association

0.28 49M
Securitized

Federal National Mortgage Association 6.30769%

0.27 49M
Securitized

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