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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

Weighted by ISIN/CUSIP
8.9 %

625 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.

SCHZ only 89.8% Shared 8.9% SPMB only 89.3%
In SCHZ only
11,457 positions
Shared
625 positions
In SPMB only
2,028 positions

Side by side

SCHZ

Schwab U.S. Aggregate Bond ETF

Schwab · US Aggregate Bond

89 composite / 100
Expense ratio
0.030%
Net assets
$10.60B
TTM yield
4.16%
Top-10 conc.
5.4%
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%

Sub-score comparison

97
Cost
96
52
Tax efficiency
52
100
Liquidity
93
100
Concentration
95
—
Tracking quality
—
SCHZ sub-score SPMB

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

625 shared in total
# Holding In SCHZ In SPMB Overlap
1 UMBS, TBA 0.34% 0.23% 0.23%
2 UMBS, TBA 0.22% 0.36% 0.22%
3 UMBS, TBA 0.17% 0.60% 0.17%
4 UMBS, TBA 0.13% 0.26% 0.13%
5 Freddie Mac 0.12% 0.30% 0.12%
6 UMBS, TBA 0.28% 0.11% 0.11%
7 Freddie Mac 0.11% 0.32% 0.11%
8 Freddie Mac 0.10% 0.36% 0.10%
9 Government National Mortgage Association 0.09% 0.23% 0.09%
10 Freddie Mac 0.09% 0.22% 0.09%
11 Fannie Mae 0.08% 0.39% 0.08%
12 Fannie Mae 0.08% 0.15% 0.08%

Only in SCHZ

11,457 total
  • United States Treasury 0.44%
  • United States Treasury 0.39%
  • United States Treasury 0.38%
  • United States Treasury 0.38%
  • United States Treasury 0.38%
  • United States Treasury 0.38%
  • United States Treasury 0.38%
  • United States Treasury 0.37%
  • United States Treasury 0.36%
  • United States Treasury 0.36%

Only in SPMB

2,028 total
  • Freddie Mac 0.92%
  • Government National Mortgage Association 0.52%
  • Freddie Mac 0.48%
  • UMBS, TBA 0.48%
  • Fannie Mae 0.47%
  • Freddie Mac 0.46%
  • Government National Mortgage Association 0.45%
  • Freddie Mac 0.45%
  • Fannie Mae 0.40%
  • Freddie Mac 0.40%

Open SCHZ or SPMB 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.