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ETF comparison

SPMB vs VGSH

US Aggregate Bond vs US Treasury (Short).

State Street SPDR Portfolio Mortgage Backed Bond ETF · Vanguard Short-Term Treasury Index Fund ETF Shares

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

0 positions appear in both funds. Buying equal dollars of SPMB and VGSH would leave roughly 0.0% of each dollar exposed to the same underlying securities.

SPMB unmatched 98.1% Shared 0.0% VGSH unmatched 99.0%

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.

In SPMB only
2,699 positions
Shared
0 positions
In VGSH only
91 positions

Side by side

SPMB

State Street SPDR Portfolio Mortgage Backed Bond ETF

State Street · US Aggregate Bond

87 composite / 100
Expense ratio
0.040%
Net assets
$6.82B
TTM yield
4.27%
Top-10 conc.
6.6%
VGSH

Vanguard Short-Term Treasury Index Fund ETF Shares

Vanguard · US Treasury (Short)

89 composite / 100
Expense ratio
0.030%
Net assets
$39.49B
whole fund, 3 share classes
TTM yield
3.77%
Top-10 conc.
13.9%

Sub-score comparison

96
Cost
97
52
Tax efficiency
58
93
Liquidity
100
100
Concentration
N/A
—
Tracking quality
—
SPMB sub-score VGSH

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

VGSH 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 SPMB vs VGSH.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in SPMB

2,699 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%

Only in VGSH

91 total
  • United States Treasury Note/Bond 2.24%
  • United States Treasury Note/Bond 1.40%
  • United States Treasury Note/Bond 1.35%
  • United States Treasury Note/Bond 1.31%
  • United States Treasury Note/Bond 1.30%
  • United States Treasury Note/Bond 1.29%
  • United States Treasury Note/Bond 1.26%
  • United States Treasury Note/Bond 1.26%
  • United States Treasury Note/Bond 1.25%
  • United States Treasury Note/Bond 1.25%

Related comparisons

More comparisons with SPMB

More comparisons with VGSH

Percentages are holdings overlap with the named fund.

Open SPMB or VGSH 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.