ETF comparison
BOND vs MBB
Both US Aggregate Bond.
Holdings overlap
15 positions appear in both funds. Buying equal dollars of BOND and MBB would leave roughly 0.6% 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 50 bps cheaper than BOND. On a $100,000 position that's about $500/yr more in fees for BOND.
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 BOND vs MBB.
Top shared holdings
15 shared in total| # | Holding | In BOND | In MBB | Overlap |
|---|---|---|---|---|
| 1 | Freddie Mac | 0.31% | 0.22% | 0.22% |
| 2 | Fannie Mae | 0.57% | 0.14% | 0.14% |
| 3 | Freddie Mac | 0.73% | 0.09% | 0.09% |
| 4 | Fannie Mae | 0.30% | 0.06% | 0.06% |
| 5 | Fannie Mae | 0.76% | 0.06% | 0.06% |
| 6 | Freddie Mac | 0.31% | 0.01% | 0.01% |
| 7 | Freddie Mac | 0.06% | 0.01% | 0.01% |
| 8 | Freddie Mac | 0.20% | 0.00% | 0.00% |
| 9 | Freddie Mac | 0.01% | 0.00% | 0.00% |
| 10 | Government National Mortgage Association | 0.00% | 0.00% | 0.00% |
| 11 | Government National Mortgage Association | 0.00% | 0.00% | 0.00% |
| 12 | Government National Mortgage Association | 0.00% | 0.00% | 0.00% |
Only in BOND
1,504 total- UMBS, TBA 5.56%
- PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund 4.07%
- UMBS, TBA 3.46%
- United States Treasury 3.39%
- UMBS, TBA 2.73%
- United States Treasury 2.57%
- UMBS, TBA 2.54%
- UMBS, TBA 2.27%
- United States Treasury 1.94%
- United States Treasury 1.93%
Only in MBB
11,129 total- Freddie Mac 1.05%
- Government National Mortgage Association 0.95%
- UMBS, TBA 0.83%
- Government National Mortgage Association 0.67%
- UMBS, TBA 0.64%
- Government National Mortgage Association 0.55%
- Government National Mortgage Association 0.54%
- Government National Mortgage Association 0.53%
- Fannie Mae 0.52%
- Freddie Mac 0.50%
Related comparisons
More comparisons with BOND
- BOND vs GOVT · iShares U.S. Treasury Bond ETF 0.5%
- BOND vs TLT · iShares 20+ Year Treasury Bond ETF 0.5%
- BOND vs FLOT · iShares Floating Rate Bond ETF 0.3%
- BOND vs PAAA · PGIM AAA CLO ETF 0.3%
- BOND vs BNDX · Vanguard Total International Bond Index Fund ETF Shares 0.1%
- BOND vs ICSH · iShares Ultra Short Duration Bond Active ETF 0.1%
More comparisons with MBB
- MBB vs PYLD · PIMCO ETF Trust - PIMCO Multisector Bond Active Exchange-Traded Fund 0.2%
- MBB vs BINC · iShares Flexible Income Active ETF 0.0%
- MBB vs BIV · Vanguard Intermediate-Term Bond Index Fund ETF Shares 0.0%
- MBB vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 0.0%
- MBB vs BNDX · Vanguard Total International Bond Index Fund ETF Shares 0.0%
- MBB vs BSV · Vanguard Short-Term Bond Index Fund ETF Shares 0.0%
Percentages are holdings overlap with the named fund.
Open BOND 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.