ETF comparison
SCHZ vs SPMB
Both US Aggregate Bond.
Schwab U.S. Aggregate Bond ETF · State Street SPDR Portfolio Mortgage Backed Bond ETF
Holdings overlap
641 positions appear in both funds. Buying equal dollars of SCHZ and SPMB would leave roughly 8.9% 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
SCHZ is 1 bps cheaper than SPMB. On a $100,000 position that's about $10/yr more in fees for SPMB.
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 SCHZ vs SPMB.
Top shared holdings
641 shared in total| # | Holding | In SCHZ | In SPMB | Overlap |
|---|---|---|---|---|
| 1 | UMBS, TBA | 0.26% | 0.45% | 0.26% |
| 2 | UMBS, TBA | 0.19% | 0.39% | 0.19% |
| 3 | UMBS, TBA | 0.18% | 0.46% | 0.18% |
| 4 | UMBS, TBA | 0.15% | 0.63% | 0.15% |
| 5 | UMBS, TBA | 0.13% | 0.20% | 0.13% |
| 6 | Fannie Mae | 0.12% | 0.14% | 0.12% |
| 7 | Fannie Mae | 0.11% | 0.17% | 0.11% |
| 8 | Freddie Mac | 0.11% | 0.29% | 0.11% |
| 9 | Freddie Mac | 0.10% | 0.30% | 0.10% |
| 10 | Freddie Mac | 0.10% | 0.35% | 0.10% |
| 11 | Government National Mortgage Association | 0.08% | 0.22% | 0.08% |
| 12 | UMBS, TBA | 0.08% | 0.26% | 0.08% |
Only in SCHZ
11,685 total- United States Treasury 0.39%
- United States Treasury 0.39%
- United States Treasury 0.39%
- United States Treasury 0.37%
- United States Treasury 0.37%
- United States Treasury 0.37%
- United States Treasury 0.36%
- United States Treasury 0.36%
- United States Treasury 0.36%
- United States Treasury 0.36%
Only in SPMB
2,058 total- Freddie Mac 1.17%
- Fannie Mae 0.49%
- Fannie Mae 0.45%
- Government National Mortgage Association 0.44%
- Freddie Mac 0.44%
- Freddie Mac 0.44%
- Freddie Mac 0.42%
- Freddie Mac 0.38%
- Freddie Mac 0.36%
- Government National Mortgage Association 0.36%
Related comparisons
More comparisons with SCHZ
- SCHZ vs VCSH · Vanguard Short-Term Corporate Bond Index Fund ETF Shares 8.7%
- SCHZ vs IGLB · iShares 10+ Year Investment Grade Corporate Bond ETF 7.6%
- SCHZ vs SPLB · State Street SPDR Portfolio Long Term Corporate Bond ETF 7.2%
- SCHZ vs CGCP · Capital Group Core Plus Income ETF 7.2%
- SCHZ vs VCLT · Vanguard Long-Term Corporate Bond Index Fund ETF Shares 6.9%
- SCHZ vs MBB · iShares MBS ETF 6.8%
More comparisons with SPMB
- SPMB vs BND · Vanguard Total Bond Market Index Fund ETF Shares 5.9%
- SPMB vs AGG · iShares Core U.S. Aggregate Bond ETF 5.5%
- SPMB vs VCRB · Vanguard Core Bond ETF 4.9%
- SPMB vs EAGG · iShares ESG U.S. Aggregate Bond ETF 3.9%
- SPMB vs CGCP · Capital Group Core Plus Income ETF 3.8%
- SPMB vs IUSB · iShares Core Universal USD Bond ETF 3.6%
Percentages are holdings overlap with the named fund.
Open SCHZ 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.