ETF comparison
AGGvsMBB
Both US Aggregate Bond.
Holdings overlap
1,879 positions appear in both funds. Buying equal dollars of AGG and MBB would leave roughly17.4%of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — seewhat we don't scorefor why.
Cost difference
AGG 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 thecost calculator pre-filled with AGG vs MBB.
Top shared holdings
1,879 shared in total| # | Holding | In AGG | In MBB | Overlap |
|---|---|---|---|---|
| 1 | BlackRock Funds III | 0.62% | 6.77% | 0.62% |
| 2 | Fannie Mae | 0.22% | 0.31% | 0.22% |
| 3 | UMBS, TBA | 0.20% | 0.34% | 0.20% |
| 4 | UMBS, TBA | 0.16% | 0.64% | 0.16% |
| 5 | Government National Mortgage Association | 0.14% | 0.95% | 0.14% |
| 6 | Freddie Mac | 0.14% | 0.18% | 0.14% |
| 7 | Government National Mortgage Association | 0.14% | 0.35% | 0.14% |
| 8 | UMBS, TBA | 0.14% | 0.83% | 0.14% |
| 9 | Fannie Mae | 0.13% | 0.44% | 0.13% |
| 10 | Fannie Mae | 0.13% | 0.52% | 0.13% |
| 11 | Government National Mortgage Association | 0.12% | 0.20% | 0.12% |
| 12 | Government National Mortgage Association | 0.12% | 0.67% | 0.12% |
Only in AGG
11,388 total- United States Treasury0.42%
- United States Treasury0.41%
- United States Treasury0.41%
- United States Treasury0.40%
- United States Treasury0.40%
- United States Treasury0.39%
- United States Treasury0.39%
- United States Treasury0.39%
- United States Treasury0.39%
- United States Treasury0.38%
Only in MBB
9,266 total- Fannie Mae0.33%
- Fannie Mae0.28%
- Fannie Mae0.23%
- Fannie Mae0.21%
- Freddie Mac0.20%
- Freddie Mac0.19%
- Fannie Mae0.17%
- Fannie Mae0.17%
- Fannie Mae0.16%
- Freddie Mac0.15%
Open AGG 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 methodologyand 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.