ETF comparison
JCPB vs MBB
Both US Aggregate Bond.
Holdings overlap
24 positions appear in both funds. Buying equal dollars of JCPB and MBB would leave roughly 2.3% 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 33 bps cheaper than JCPB. On a $100,000 position that's about $330/yr more in fees for JCPB.
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 JCPB vs MBB.
Top shared holdings
24 shared in total| # | Holding | In JCPB | In MBB | Overlap |
|---|---|---|---|---|
| 1 | FNMA/FHLMC | 1.24% | 0.83% | 0.83% |
| 2 | FNMA/FHLMC | 1.78% | 0.64% | 0.64% |
| 3 | GNMA | 0.25% | 0.67% | 0.25% |
| 4 | GNMA | 0.17% | 0.28% | 0.17% |
| 5 | GNMA | 0.06% | 0.05% | 0.05% |
| 6 | GNMA | 0.06% | 0.04% | 0.04% |
| 7 | FNMA | 0.04% | 0.04% | 0.04% |
| 8 | FNMA | 0.04% | 0.05% | 0.04% |
| 9 | FNMA/FHLMC | 1.36% | 0.03% | 0.03% |
| 10 | GNMA | 0.03% | 0.11% | 0.03% |
| 11 | FHLMC Pool | 0.03% | 0.03% | 0.03% |
| 12 | GNMA | 0.16% | 0.03% | 0.03% |
Only in JCPB
2,601 total- United States of America 3.17%
- United States of America 1.15%
- United States of America 0.88%
- United States of America 0.79%
- United States of America 0.73%
- United States of America 0.65%
- United States of America 0.58%
- United States of America 0.55%
- United States of America 0.39%
- United States of America 0.39%
Only in MBB
11,120 total- Freddie Mac 1.05%
- Government National Mortgage Association 0.95%
- 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%
- Government National Mortgage Association 0.46%
- Government National Mortgage Association 0.45%
- Fannie Mae 0.44%
Related comparisons
More comparisons with JCPB
- JCPB vs DFCF · Dimensional Core Fixed Income ETF 1.8%
- JCPB vs BOND · PIMCO Active Bond Exchange-Traded Fund 1.3%
- JCPB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 1.1%
- JCPB vs SHY · iShares 1-3 Year Treasury Bond ETF 0.7%
- JCPB vs VGSH · Vanguard Short-Term Treasury Index Fund ETF Shares 0.7%
- JCPB vs VUSB · Vanguard Ultra-Short Bond ETF 0.6%
More comparisons with MBB
- MBB vs AGGY · WisdomTree Yield Enhanced U.S. Aggregate Bond Fund 1.4%
- MBB vs CGCP · Capital Group Core Plus Income ETF 0.9%
- MBB vs BOND · PIMCO Active Bond Exchange-Traded Fund 0.6%
- 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%
Percentages are holdings overlap with the named fund.
Open JCPB 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.