Vanguard Mortgage-Backed Secs Idx Fund Admiral (VMBSX)
18.80
-0.01
(-0.05%)
USD |
Feb 04 2026
Returns Chart
Key Stats
| Net Expense Ratio | Total Assets Under Management | Weighted Average Dividend Yield | Turnover Ratio (Generic) |
|---|---|---|---|
| 0.06% | 14.80B | -- | 91.00% |
| 1 Year Fund Level Flows | 1 Year Total Returns (Daily) | Annualized Total Returns Since Inception (Daily) | Max Drawdown (Since Inception) |
| -5.440B | 7.89% |
Basic Info
| Investment Strategy | |
| The Fund seeks to track the performance of a market-weighted mortgage-backed securities index. The Fund employs an indexing approach to track the Bloomberg Barclays US MBS Float Adjusted Index. The Fund invests by sampling the Index and at least 80% of the Funds assets will be invested in bonds included in the Index. |
| General | |
| Security Type | Mutual Fund |
| Equity Style | -- |
| Broad Asset Class | Taxable Bond |
| Broad Category | Fixed Income |
| Global Peer Group | Bond USD Mortgages |
| Peer Group | U.S. Mortgage Funds |
| Global Macro | Bond HC |
| US Macro | U.S. Government & Treasury Fixed Income Funds |
| YCharts Categorization | -- |
| YCharts Benchmark | -- |
| Prospectus Objective | U.S. Mortgage Funds |
| Fund Owner Firm Name | Vanguard |
| Broad Asset Class Benchmark Index | |
| ^BBUSATR | 100.0% |
Net Fund Flows Versus Peer Group
1 Month
% Rank:
99
-430.82M
Peer Group Low
159.72M
Peer Group High
1 Year
% Rank:
100
-5.440B
-5.443B
Peer Group Low
5.643B
Peer Group High
3 Months
% Rank:
2
-2.950B
Peer Group Low
582.65M
Peer Group High
3 Years
% Rank:
88
-6.642B
Peer Group Low
9.491B
Peer Group High
6 Months
% Rank:
94
-2.668B
Peer Group Low
838.42M
Peer Group High
5 Years
% Rank:
15
-20.25B
Peer Group Low
10.90B
Peer Group High
YTD
% Rank:
99
-430.82M
Peer Group Low
159.72M
Peer Group High
10 Years
% Rank:
2
-30.41B
Peer Group Low
27.55B
Peer Group High
Date Unavailable
Risk
Performance Versus Peer Group
Annual Total Returns Versus Peers
As of February 05, 2026.
Asset Allocation
As of December 31, 2025.
| Type | % Net |
|---|---|
| Cash | 0.27% |
| Stock | 0.00% |
| Bond | 91.38% |
| Convertible | 0.00% |
| Preferred | 0.00% |
| Other | 8.35% |
Top 10 Holdings
| Name | % Weight | Price | % Change |
|---|---|---|---|
|
Vanguard Market Liquidity Fund
|
4.47% | -- | -- |
|
Federal National Mortgage Association 5% 01-JAN-2056
|
0.62% | -- | -- |
|
Government National Mortgage Association 2 5% 01-JAN-2056
|
0.48% | -- | -- |
|
Federal National Mortgage Association 5.5% 01-JAN-2056
|
0.48% | -- | -- |
|
Federal Home Loan Mortgage Corp 01-FEB-2052 SD4155
|
0.28% | -- | -- |
|
USD Cash
|
0.27% | -- | -- |
|
Government National Mortgage Association 2 20-NOV-2054 MB0025
|
0.27% | -- | -- |
| FHLMC-New 2.0 05/25/2051 FIX USD Agency | 0.26% | 80.95 | 0.01% |
| FHLMC-New 2.0 02/25/2051 FIX USD Agency | 0.24% | 81.54 | 0.01% |
| FNMA-New 2.0 05/25/2051 FIX USD Agency | 0.23% | 81.53 | 0.01% |
Fees & Availability
| Fees | |
| Actual 12B-1 Fee | -- |
| Actual Management Fee | 0.05% |
| Administration Fee | 394.0K% |
| Maximum Front Load | -- |
| Maximum Deferred Load | -- |
| Maximum Redemption Fee | -- |
| General Availability | |
| Available for Insurance Product | -- |
| Available for RRSP | -- |
| Purchase Details | |
| Open to New Investors |
|
| Minimum Initial Investment | 3000.00 None |
| Minimum Subsequent Investment | 1.00 None |
Basic Info
| Investment Strategy | |
| The Fund seeks to track the performance of a market-weighted mortgage-backed securities index. The Fund employs an indexing approach to track the Bloomberg Barclays US MBS Float Adjusted Index. The Fund invests by sampling the Index and at least 80% of the Funds assets will be invested in bonds included in the Index. |
| General | |
| Security Type | Mutual Fund |
| Equity Style | -- |
| Broad Asset Class | Taxable Bond |
| Broad Category | Fixed Income |
| Global Peer Group | Bond USD Mortgages |
| Peer Group | U.S. Mortgage Funds |
| Global Macro | Bond HC |
| US Macro | U.S. Government & Treasury Fixed Income Funds |
| YCharts Categorization | -- |
| YCharts Benchmark | -- |
| Prospectus Objective | U.S. Mortgage Funds |
| Fund Owner Firm Name | Vanguard |
| Broad Asset Class Benchmark Index | |
| ^BBUSATR | 100.0% |
Fundamentals
| General | |
| Distribution Yield | -- |
| Dividend Yield TTM (2-3-26) | 4.19% |
| 30-Day SEC Yield (12-31-25) | 3.94% |
| 7-Day SEC Yield | -- |
| Number of Holdings | 5022 |
| Bond | |
| Yield to Maturity (12-31-25) | 4.67% |
| Effective Duration | 5.00 |
| Average Coupon | 3.95% |
| Calculated Average Quality | 1.00 |
| Effective Maturity | 25.81 |
| Nominal Maturity | 25.81 |
| Number of Bond Holdings | 4989 |
As of December 31, 2025
Fund Details
| Key Dates | |
| Inception Date | 12/3/2009 |
| Share Classes | |
| VMBIX | Inst |
| Attributes | |
| Inverse Fund | -- |
| Leveraged Fund | -- |
| Currency Hedged Fund | -- |
| Socially Responsible Fund | No |
Top Portfolio Holders
| Name | % Weight |
|---|---|
| Portfolio A | 5.00% |
| Portfolio B | 3.50% |
| Portfolio C | 2.25% |
Excel Add-In Codes
| Name: =YCI("M:VMBSX", "name") |
| Broad Asset Class: =YCI("M:VMBSX", "broad_asset_class") |
| Broad Category: =YCI("M:VMBSX", "broad_category_group") |
| Prospectus Objective: =YCI("M:VMBSX", "prospectus_objective") |
| To find the codes for any of our securities and financial metrics, see our Complete Excel Reference. |