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ETF comparison

SPMB vs VCRB

Both US Aggregate Bond.

State Street SPDR Portfolio Mortgage Backed Bond ETF · Vanguard Core Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
7.4 %

110 positions appear in both funds. Buying equal dollars of SPMB and VCRB would leave roughly 7.4% of each dollar exposed to the same underlying securities.

SPMB only 90.8% Shared 7.4% VCRB only 102.1%
In SPMB only
2,543 positions
Shared
110 positions
In VCRB only
2,991 positions

Side by side

SPMB

State Street SPDR Portfolio Mortgage Backed Bond ETF

State Street · US Aggregate Bond

86 composite / 100
Expense ratio
0.040%
Net assets
$7.07B
TTM yield
4.11%
Top-10 conc.
13.6%
VCRB

Vanguard Core Bond ETF

Vanguard · US Aggregate Bond

84 composite / 100
Expense ratio
0.10%
Net assets
$7.29B
TTM yield
4.63%
Top-10 conc.
12.9%

Sub-score comparison

96
Cost
90
52
Tax efficiency
51
93
Liquidity
94
95
Concentration
96
—
Tracking quality
—
SPMB sub-score VCRB

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

110 shared in total
# Holding In SPMB In VCRB Overlap
1 UMBS, TBA 0.60% 0.96% 0.60%
2 Government National Mortgage Association 0.52% 1.65% 0.52%
3 UMBS, TBA 0.48% 0.50% 0.48%
4 Government National Mortgage Association 0.45% 0.53% 0.45%
5 UMBS, TBA 0.34% 1.46% 0.34%
6 UMBS, TBA 0.30% 1.45% 0.30%
7 UMBS, TBA 0.28% 1.92% 0.28%
8 UMBS, TBA 0.26% 0.48% 0.26%
9 UMBS, TBA 0.23% 0.97% 0.23%
10 Government National Mortgage Association 0.19% 0.59% 0.19%
11 Government National Mortgage Association 0.18% 0.25% 0.18%
12 UMBS, TBA 0.17% 0.20% 0.17%

Only in SPMB

2,543 total
  • Freddie Mac 0.92%
  • Freddie Mac 0.89%
  • Freddie Mac 0.64%
  • Government National Mortgage Association 0.62%
  • Freddie Mac 0.60%
  • Fannie Mae 0.50%
  • Freddie Mac 0.48%
  • Fannie Mae 0.47%
  • Freddie Mac 0.46%
  • Freddie Mac 0.46%

Only in VCRB

2,991 total
  • United States Treasury Note/Bond 1.17%
  • United States Treasury Note/Bond 0.97%
  • United States Treasury Note/Bond 0.74%
  • United States Treasury Note/Bond 0.62%
  • United States Treasury Note/Bond 0.53%
  • Mexico Government International Bond 0.46%
  • United States Treasury Note/Bond 0.45%
  • United States Treasury Note/Bond 0.44%
  • United States Treasury Note/Bond 0.42%
  • OBX 2026-INV1 Trust 0.41%

Open SPMB or VCRB at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

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.