ETF comparison
JCPB vs SPMB
Both US Aggregate Bond.
JPMorgan Core Plus Bond ETF · State Street SPDR Portfolio Mortgage Backed Bond Index ETF
Holdings overlap
11 positions appear in both funds. Buying equal dollars of JCPB and SPMB would leave roughly 0.2% 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
SPMB 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 SPMB.
Top shared holdings
11 shared in total| # | Holding | In JCPB | In SPMB | Overlap |
|---|---|---|---|---|
| 1 | GNMA | 0.21% | 0.03% | 0.03% |
| 2 | FNMA | 0.03% | 0.06% | 0.03% |
| 3 | GNMA | 0.14% | 0.03% | 0.03% |
| 4 | GNMA | 0.03% | 0.07% | 0.03% |
| 5 | FNMA | 0.02% | 0.07% | 0.02% |
| 6 | GNMA | 0.02% | 0.25% | 0.02% |
| 7 | FNMA | 0.04% | 0.02% | 0.02% |
| 8 | FHLMC Pool | 0.01% | 0.05% | 0.01% |
| 9 | GNMA | 0.05% | 0.01% | 0.01% |
| 10 | GNMA | 0.05% | 0.00% | 0.00% |
| 11 | FNMA | 0.00% | 0.00% | 0.00% |
Only in JCPB
2,678 total- United States of America 2.68%
- FNMA/FHLMC 1.39%
- FNMA/FHLMC 1.26%
- FNMA/FHLMC 1.13%
- United States of America 1.06%
- United States of America 0.91%
- United States of America 0.76%
- United States of America 0.73%
- United States of America 0.66%
- United States of America 0.63%
Only in SPMB
2,688 total- Freddie Mac 1.17%
- Fannie Mae 0.79%
- Freddie Mac 0.76%
- UMBS, TBA 0.63%
- Freddie Mac 0.61%
- Freddie Mac 0.55%
- Government National Mortgage Association 0.55%
- Fannie Mae 0.51%
- Fannie Mae 0.49%
- Fannie Mae 0.47%
Related comparisons
More comparisons with JCPB
- JCPB vs PULS · PGIM Ultra Short Bond ETF 0.1%
- JCPB vs ICSH · iShares Ultra Short Duration Bond Active ETF 0.0%
- JCPB vs BNDX · Vanguard Total International Bond Index Fund ETF Shares 0.0%
- JCPB vs FLOT · iShares Floating Rate Bond ETF 0.0%
- JCPB vs JAAA · Janus Henderson AAA CLO ETF 0.0%
- JCPB vs PAAA · PGIM AAA CLO ETF 0.0%
More comparisons with SPMB
- SPMB vs BINC · iShares Flexible Income Active ETF 0.0%
- SPMB vs BIV · Vanguard Intermediate-Term Bond Index Fund ETF Shares 0.0%
- SPMB vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 0.0%
- SPMB vs BNDX · Vanguard Total International Bond Index Fund ETF Shares 0.0%
- SPMB vs BSV · Vanguard Short-Term Bond Index Fund ETF Shares 0.0%
- SPMB vs DFCF · Dimensional Core Fixed Income ETF 0.0%
Percentages are holdings overlap with the named fund.
Open JCPB or SPMB 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.