ETF comparison
BLV vs MBB
Both US Aggregate Bond.
Vanguard Long-Term Bond Index Fund ETF Shares · iShares MBS ETF
Holdings overlap
0 positions appear in both funds. Buying equal dollars of BLV and MBB would leave roughly 0.0% 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
BLV is 1 bps cheaper than MBB. On a $100,000 position that's about $10/yr more in fees for MBB.
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 BLV vs MBB.
Top shared holdings
0 shared in totalNo shared holdings between these funds.
Only in BLV
2,983 total- United States Treasury Note/Bond 1.17%
- United States Treasury Note/Bond 1.15%
- United States Treasury Note/Bond 1.14%
- United States Treasury Note/Bond 1.13%
- United States Treasury Note/Bond 1.13%
- United States Treasury Note/Bond 1.10%
- United States Treasury Note/Bond 1.08%
- United States Treasury Note/Bond 1.08%
- United States Treasury Note/Bond 1.06%
- United States Treasury Note/Bond 0.97%
Only in MBB
11,144 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 BLV
- BLV vs MINT · PIMCO Enhanced Short Maturity Active Exchange-Traded Fund 0.0%
- BLV vs NEAR · iShares Short Duration Bond Active ETF 0.0%
- BLV vs PAAA · PGIM AAA CLO ETF 0.0%
- BLV vs PULS · PGIM Ultra Short Bond ETF 0.0%
- BLV vs SCHP · Schwab U.S. TIPS ETF 0.0%
- BLV vs SHY · iShares 1-3 Year Treasury Bond ETF 0.0%
More comparisons with MBB
- 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%
- MBB vs DFCF · Dimensional Core Fixed Income ETF 0.0%
- MBB vs FLOT · iShares Floating Rate Bond ETF 0.0%
- MBB vs GOVT · iShares U.S. Treasury Bond ETF 0.0%
- MBB vs GVI · iShares Intermediate Government/Credit Bond ETF 0.0%
Percentages are holdings overlap with the named fund.
Open BLV 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.