ETF comparison
SPMB vs VCRB
Both US Aggregate Bond.
State Street SPDR Portfolio Mortgage Backed Bond ETF · Vanguard Core Bond ETF
Holdings overlap
104 positions appear in both funds. Buying equal dollars of SPMB and VCRB would leave roughly 4.9% 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
SPMB is 6 bps cheaper than VCRB. On a $100,000 position that's about $60/yr more in fees for VCRB.
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 SPMB vs VCRB.
Top shared holdings
104 shared in total| # | Holding | In SPMB | In VCRB | Overlap |
|---|---|---|---|---|
| 1 | UMBS, TBA | 0.63% | 0.68% | 0.63% |
| 2 | UMBS, TBA | 0.45% | 2.33% | 0.45% |
| 3 | Government National Mortgage Association | 0.36% | 0.56% | 0.36% |
| 4 | UMBS, TBA | 0.26% | 0.54% | 0.26% |
| 5 | Fannie Mae | 0.17% | 0.30% | 0.17% |
| 6 | Fannie Mae | 0.14% | 0.20% | 0.14% |
| 7 | Freddie Mac | 0.29% | 0.11% | 0.11% |
| 8 | Government National Mortgage Association | 0.11% | 0.10% | 0.10% |
| 9 | Fannie Mae | 0.17% | 0.10% | 0.10% |
| 10 | Government National Mortgage Association | 0.10% | 0.10% | 0.10% |
| 11 | Government National Mortgage Association | 0.21% | 0.10% | 0.10% |
| 12 | Government National Mortgage Association | 0.09% | 0.14% | 0.09% |
Only in SPMB
2,595 total- Freddie Mac 1.17%
- Freddie Mac 0.76%
- Freddie Mac 0.61%
- Government National Mortgage Association 0.55%
- Fannie Mae 0.49%
- Fannie Mae 0.47%
- UMBS, TBA 0.46%
- Fannie Mae 0.45%
- Freddie Mac 0.44%
- Freddie Mac 0.44%
Only in VCRB
3,310 total- United States Treasury Note/Bond 1.02%
- NVIDIA Corp 0.97%
- NVIDIA Corp 0.75%
- United States Treasury Note/Bond 0.65%
- Kreditanstalt fuer Wiederaufbau 0.60%
- Fannie Mae REMICS 0.59%
- OBX 2026-INV2 Trust 0.57%
- United States Treasury Note/Bond 0.55%
- Finland Government International Bond 0.54%
- United States Treasury Note/Bond 0.54%
Related comparisons
More comparisons with SPMB
- 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%
- SPMB vs FBND · Fidelity Total Bond ETF 2.6%
- SPMB vs PYLD · PIMCO ETF Trust - PIMCO Multisector Bond Active Exchange-Traded Fund 2.4%
- SPMB vs BOND · PIMCO Active Bond Exchange-Traded Fund 1.9%
More comparisons with VCRB
- VCRB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 4.6%
- VCRB vs TLT · iShares 20+ Year Treasury Bond ETF 4.0%
- VCRB vs VUSB · Vanguard Ultra-Short Bond ETF 3.9%
- VCRB vs DFCF · Dimensional Core Fixed Income ETF 3.4%
- VCRB vs MBB · iShares MBS ETF 3.2%
- VCRB vs SHY · iShares 1-3 Year Treasury Bond ETF 2.6%
Percentages are holdings overlap with the named fund.
Open SPMB or VCRB 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.