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ETF comparison

BLV vs VMBS

Both US Aggregate Bond.

Vanguard Long-Term Bond Index Fund ETF Shares · Vanguard Mortgage-Backed Securities Index Fund ETF Shares

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

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

BLV unmatched 98.8% Shared 0.0% VMBS unmatched 99.3%

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 BLV only
2,983 positions
Shared
0 positions
In VMBS only
5,112 positions

Side by side

BLV

Vanguard Long-Term Bond Index Fund ETF Shares

Vanguard · US Aggregate Bond

87 composite / 100
Expense ratio
0.030%
Net assets
$7.79B
whole fund, 4 share classes
TTM yield
5.08%
Top-10 conc.
11.0%
VMBS

Vanguard Mortgage-Backed Securities Index Fund ETF Shares

Vanguard · US Aggregate Bond

89 composite / 100
Expense ratio
0.030%
Net assets
$17.10B
whole fund, 3 share classes
TTM yield
4.35%
Top-10 conc.
3.2%

Sub-score comparison

97
Cost
97
50
Tax efficiency
52
95
Liquidity
100
99
Concentration
100
—
Tracking quality
—
BLV 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 BLV vs VMBS.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in BLV

2,983 total
  • United States Treasury Note/Bond 1.17%
  • United States Treasury Note/Bond 1.15%
  • United States Treasury Note/Bond 1.14%
  • United States Treasury Note/Bond 1.13%
  • United States Treasury Note/Bond 1.13%
  • United States Treasury Note/Bond 1.10%
  • United States Treasury Note/Bond 1.08%
  • United States Treasury Note/Bond 1.08%
  • United States Treasury Note/Bond 1.06%
  • United States Treasury Note/Bond 0.97%

Only in VMBS

5,112 total
  • Fannie Mae or Freddie Mac 0.52%
  • Ginnie Mae II Pool 0.36%
  • Ginnie Mae II Pool 0.32%
  • Ginnie Mae II Pool 0.31%
  • Fannie Mae Pool 0.29%
  • Ginnie Mae II Pool 0.29%
  • Ginnie Mae II Pool 0.29%
  • Ginnie Mae II Pool 0.28%
  • Freddie Mac Pool 0.27%
  • Freddie Mac Pool 0.27%

Related comparisons

More comparisons with BLV

More comparisons with VMBS

Percentages are holdings overlap with the named fund.

Open BLV 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.