Index · 3 ranked
Funds Tracking the Bloomberg U.S. MBS Float Adjusted
Ranked by expense ratio, lowest first.
Data as of May 31, 2026 ·How this data is built
As of May 31, 2026, FundVersus ranks 3 funds tracking the Bloomberg U.S. MBS Float Adjusted by expense ratio. The lowest is Vanguard Mortgage-Backed Securities Index Fund Institutional Shares (VMBIX) at 0.02%. Vanguard Mortgage-Backed Securities Index Fund ETF Shares (VMBS) and Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) follow at 0.03% and 0.04%. The median is 0.03%; weighted by assets, 0.03%.
Facts from SEC filings. Not investment advice.
The ranking
Only the stated measure sets the order. Expense ratios from prospectuses; net assets and returns from Form N-PORT.
| # | Fund | Expense ratio | Net assets | 1-year return | |
|---|---|---|---|---|---|
| 1 | Vanguard Mortgage-Backed Securities Index Fund Institutional SharesVMBIX · Mutual fund · Mortgage-Backed | 0.02% | $16.9B | +7.43% | |
| 2 | Vanguard Mortgage-Backed Securities Index Fund ETF SharesVMBS · ETF · Mortgage-Backed | 0.03% | $16.9B | +7.41% | |
| 3 | Vanguard Mortgage-Backed Securities Index Fund Admiral SharesVMBSX · Mutual fund · Mortgage-Backed | 0.04% | $16.9B | +7.40% |
Questions
How is this list ranked?
Ranked by expense ratio, lowest first. It includes funds tracking the Bloomberg U.S. MBS Float Adjusted with a current SEC filing and enough data for a FundVersus page. The ranking uses one stated measure and is not a recommendation.
Which has the lowest expense ratio?
Vanguard Mortgage-Backed Securities Index Fund Institutional Shares (VMBIX), at 0.02% as of May 31, 2026.
How much money is in these funds?
The 3 funds on this list reported $50.8B in combined net assets on their latest filings.