ETF comparison
FBND vs MBB
Both US Aggregate Bond.
Holdings overlap
171 positions appear in both funds. Buying equal dollars of FBND and MBB would leave roughly 5.2% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
MBB is 32 bps cheaper than FBND. On a $100,000 position that's about $320/yr more in fees for FBND.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with FBND vs MBB.
Top shared holdings
171 shared in total| # | Holding | In FBND | In MBB | Overlap |
|---|---|---|---|---|
| 1 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 1.28% | 1.05% | 1.05% |
| 2 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.46% | 0.53% | 0.46% |
| 3 | FNMA/FHLG TBA ISSUER | 0.31% | 0.32% | 0.31% |
| 4 | FNMA/FHLG TBA ISSUER | 0.30% | 0.85% | 0.30% |
| 5 | FNMA/FHLG TBA ISSUER | 0.25% | 0.70% | 0.25% |
| 6 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.21% | 0.48% | 0.21% |
| 7 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.20% | 0.49% | 0.20% |
| 8 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.16% | 0.30% | 0.16% |
| 9 | FNMA/FHLG TBA ISSUER | 1.99% | 0.15% | 0.15% |
| 10 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.14% | 0.26% | 0.14% |
| 11 | FNMA/FHLG TBA ISSUER | 0.12% | 0.17% | 0.12% |
| 12 | FNMA/FHLG TBA ISSUER | 0.57% | 0.12% | 0.12% |
Only in FBND
4,459 total- Fidelity Revere Street Trust 3.16%
- UST NOTES 2.73%
- UST NOTES 2.04%
- UST NOTES 1.97%
- UNITED STATES TREASURY BOND 1.37%
- UNITED STATES TREASURY BOND 1.36%
- UST NOTES 1.36%
- FNMA/FHLG TBA ISSUER 1.25%
- UNITED STATES TREASURY BOND 1.12%
- UST NOTES 1.09%
Only in MBB
11,038 total- Government National Mortgage Association 0.51%
- Government National Mortgage Association 0.51%
- Fannie Mae 0.49%
- Fannie Mae 0.41%
- Government National Mortgage Association 0.40%
- UMBS, TBA 0.39%
- Government National Mortgage Association 0.38%
- Government National Mortgage Association 0.34%
- Government National Mortgage Association 0.33%
- Fannie Mae 0.31%
Related comparisons
More comparisons with FBND
- FBND vs AGGY · WisdomTree Yield Enhanced U.S. Aggregate Bond Fund 4.1%
- FBND vs BINC · iShares Flexible Income Active ETF 3.5%
- FBND vs NEAR · iShares Short Duration Bond Active ETF 3.2%
- FBND vs BOND · PIMCO Active Bond Exchange-Traded Fund 2.6%
- FBND vs PYLD · PIMCO ETF Trust - PIMCO Multisector Bond Active Exchange-Traded Fund 2.5%
- FBND vs BSV · Vanguard Short-Term Bond Index Fund ETF Shares 2.3%
More comparisons with MBB
- MBB vs VCRB · Vanguard Core Bond ETF 3.2%
- MBB vs JCPB · JPMorgan Core Plus Bond ETF 2.3%
- MBB vs AGGY · WisdomTree Yield Enhanced U.S. Aggregate Bond Fund 1.6%
- MBB vs BINC · iShares Flexible Income Active ETF 0.9%
- MBB vs CGCP · Capital Group Core Plus Income ETF 0.9%
- MBB vs BOND · PIMCO Active Bond Exchange-Traded Fund 0.8%
Percentages are holdings overlap with the named fund.
Open FBND or MBB at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.