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ETF comparison

BND vs VMBS

Both US Aggregate Bond.

Vanguard Total Bond Market Index Fund · Vanguard Mortgage-Backed Securities Index Fund ETF Shares

Holdings overlap

Weighted by ISIN/CUSIP
15.6 %

3,538 positions appear in both funds. Buying equal dollars of BND and VMBS would leave roughly 15.6% of each dollar exposed to the same underlying securities.

BND only 83.2% Shared 15.6% VMBS only 83.1%
In BND only
13,822 positions
Shared
3,538 positions
In VMBS only
1,474 positions

Side by side

BND

Vanguard Total Bond Market Index Fund

Vanguard · US Aggregate Bond

89 composite / 100
Expense ratio
0.030%
Net assets
$397.86B
TTM yield
3.99%
Top-10 conc.
4.8%
VMBS

Vanguard Mortgage-Backed Securities Index Fund ETF Shares

Vanguard · US Aggregate Bond

89 composite / 100
Expense ratio
0.030%
Net assets
$17.34B
TTM yield
4.20%
Top-10 conc.
7.5%

Sub-score comparison

97
Cost
97
53
Tax efficiency
52
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
BND sub-score VMBS

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

Cost difference

Expense ratios are effectively identical (0.030% vs 0.030%).

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 BND vs VMBS.

Top shared holdings

3,538 shared in total
# Holding In BND In VMBS Overlap
1 Ginnie Mae II Pool 0.07% 0.09% 0.07%
2 Fannie Mae Pool 0.07% 0.18% 0.07%
3 Fannie Mae Pool 0.06% 0.24% 0.06%
4 Ginnie Mae II Pool 0.06% 0.29% 0.06%
5 Ginnie Mae II Pool 0.06% 0.23% 0.06%
6 Freddie Mac Pool 0.06% 0.25% 0.06%
7 Fannie Mae Pool 0.06% 0.08% 0.06%
8 Freddie Mac Pool 0.06% 0.15% 0.06%
9 Fannie Mae Pool 0.05% 0.19% 0.05%
10 Ginnie Mae II Pool 0.05% 0.15% 0.05%
11 Freddie Mac Pool 0.05% 0.06% 0.05%
12 Fannie Mae Pool 0.05% 0.19% 0.05%

Only in BND

13,822 total
  • United States Treasury Note/Bond 0.48%
  • United States Treasury Note/Bond 0.42%
  • United States Treasury Note/Bond 0.42%
  • United States Treasury Note/Bond 0.42%
  • United States Treasury Note/Bond 0.41%
  • United States Treasury Note/Bond 0.41%
  • United States Treasury Note/Bond 0.40%
  • United States Treasury Note/Bond 0.39%
  • United States Treasury Note/Bond 0.39%
  • United States Treasury Note/Bond 0.36%

Only in VMBS

1,474 total
  • Ginnie Mae II Pool 0.44%
  • Fannie Mae or Freddie Mac 0.43%
  • Fannie Mae or Freddie Mac 0.34%
  • Fannie Mae or Freddie Mac 0.32%
  • Freddie Mac Pool 0.29%
  • Fannie Mae or Freddie Mac 0.26%
  • Fannie Mae or Freddie Mac 0.22%
  • Fannie Mae Pool 0.21%
  • Fannie Mae or Freddie Mac 0.20%
  • Freddie Mac Pool 0.15%

Open BND or VMBS 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.