Index · 18 ranked
Funds Tracking the Bloomberg US Aggregate Bond
Ranked by expense ratio, lowest first.
Data as of May 31, 2026 ·How this data is built
As of May 31, 2026, FundVersus ranks 18 funds tracking the Bloomberg US Aggregate Bond by expense ratio. The lowest is Fidelity Series Bond Index Fund (FIFZX) at 0.00%. Fidelity Flex U.S. Bond Index Fund (FIBUX) and Vanguard Total Bond Market Index Fund Institutional Select Shares (VTBSX) follow at 0.00% and 0.01%. The median is 0.03%; weighted by assets, 0.0481%.
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 | Fidelity Series Bond Index FundFIFZX · Mutual fund · US Aggregate Bond | 0.00% | $33.4B | +6.18% | |
| 2 | Fidelity Flex U.S. Bond Index FundFIBUX · Mutual fund · US Aggregate Bond | 0.00% | $3.8B | +6.24% | |
| 3 | Vanguard Total Bond Market Index Fund Institutional Select SharesVTBSX · Mutual fund · US Aggregate Bond | 0.01% | $386.8B | +4.35% | |
| 4 | Vanguard Total Bond Market Index Fund Institutional Plus SharesVBMPX · Mutual fund · US Aggregate Bond | 0.02% | $386.8B | +4.34% | |
| 5 | Vanguard Total Bond Market II Index Fund Institutional SharesVTBNX · Mutual fund · US Aggregate Bond | 0.02% | $367.4B | +4.18% | |
| 6 | Vanguard Total Bond Market Index Fund Institutional SharesVBTIX · Mutual fund · US Aggregate Bond | 0.03% | $386.8B | +4.34% | |
| 7 | Vanguard Total Bond Market ETFBND · ETF · US Aggregate Bond | 0.03% | $386.8B | +4.24% | |
| 8 | iShares Core U.S. Aggregate Bond ETFAGG · ETF · US Aggregate Bond | 0.03% | $141.2B | +6.23% | |
| 9 | Fidelity U.S. Bond Index FundFXNAX · Mutual fund · US Aggregate Bond | 0.03% | $70.4B | +6.19% | |
| 10 | State Street SPDR Portfolio Aggregate Bond ETFSPAB · ETF · US Aggregate Bond | 0.03% | $9.3B | +4.35% | |
| 11 | Vanguard Total Bond Market Index Fund Admiral SharesVBTLX · Mutual fund · US Aggregate Bond | 0.04% | $386.8B | +4.32% | |
| 12 | Vanguard Total Bond Market II Index Fund Investor SharesVTBIX · Mutual fund · US Aggregate Bond | 0.09% | $367.4B | +4.11% | |
| 13 | Fidelity Sustainability Bond Index FundFNDSX · Mutual fund · US Aggregate Bond | 0.10% | $676M | +6.20% | |
| 14 | Bond Market Index Fund Institutional ClassPNIIX · Mutual fund · US Aggregate Bond | 0.12% | $2.8B | +6.07% | |
| 15 | Vanguard Total Bond Market Index Fund Investor SharesVBMFX · Mutual fund · US Aggregate Bond | 0.15% | $386.8B | +4.21% | |
| 16 | Bond Market Index Fund R-5PBIQX · Mutual fund · US Aggregate Bond | 0.38% | $2.8B | +5.82% | |
| 17 | Bond Market Index Fund Class JPBIJX · Mutual fund · US Aggregate Bond | 0.43% | $2.8B | +5.84% | |
| 18 | Bond Market Index Fund R-3PBOIX · Mutual fund · US Aggregate Bond | 0.69% | $2.8B | +5.62% |
Questions
How is this list ranked?
Ranked by expense ratio, lowest first. It includes funds tracking the Bloomberg US Aggregate Bond 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?
Fidelity Series Bond Index Fund (FIFZX), at 0.00% as of May 31, 2026.
How much money is in these funds?
The 18 funds on this list reported $3.33T in combined net assets on their latest filings.