PlainIndex
Menu

ETF comparison

IUSB vs VCRB

Both US Aggregate Bond.

iShares Core Universal USD Bond ETF · Vanguard Core Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
18.8 %

1,849 positions appear in both funds. Buying equal dollars of IUSB and VCRB would leave roughly 18.8% of each dollar exposed to the same underlying securities.

IUSB only 82.4% Shared 18.8% VCRB only 90.7%
In IUSB only
15,930 positions
Shared
1,849 positions
In VCRB only
1,252 positions

Side by side

IUSB

iShares Core Universal USD Bond ETF

iShares · US Aggregate Bond

88 composite / 100
Expense ratio
0.060%
Net assets
$42.77B
TTM yield
4.26%
Top-10 conc.
6.7%
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

94
Cost
90
52
Tax efficiency
51
100
Liquidity
94
100
Concentration
96
—
Tracking quality
—
IUSB sub-score VCRB

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

Cost difference

IUSB is 4 bps cheaper than VCRB. On a $100,000 position that's about $40/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 IUSB vs VCRB.

Top shared holdings

1,849 shared in total
# Holding In IUSB In VCRB Overlap
1 United States of America 0.37% 0.39% 0.37%
2 United States of America 0.37% 0.36% 0.36%
3 United States of America 0.37% 0.36% 0.36%
4 United States of America 0.34% 0.42% 0.34%
5 United States of America 0.33% 0.32% 0.32%
6 United States of America 0.36% 0.32% 0.32%
7 United States of America 0.28% 0.27% 0.27%
8 United States of America 0.25% 0.31% 0.25%
9 United States of America 0.35% 0.22% 0.22%
10 United States of America 0.21% 0.33% 0.21%
11 United States of America 0.20% 0.40% 0.20%
12 United States of America 0.19% 0.62% 0.19%

Only in IUSB

15,930 total
  • Blackrock Liquidity Tempcash 2.88%
  • United States of America 0.37%
  • United States of America 0.36%
  • United States of America 0.34%
  • United States of America 0.33%
  • United States of America 0.32%
  • Federal National Mortgage Association 0.32%
  • United States of America 0.31%
  • United States of America 0.31%
  • United States of America 0.31%

Only in VCRB

1,252 total
  • Fannie Mae or Freddie Mac 1.92%
  • Ginnie Mae II Pool 1.65%
  • Fannie Mae or Freddie Mac 1.46%
  • Fannie Mae or Freddie Mac 1.45%
  • Fannie Mae or Freddie Mac 0.97%
  • Fannie Mae or Freddie Mac 0.96%
  • Ginnie Mae II Pool 0.59%
  • Ginnie Mae II Pool 0.53%
  • Fannie Mae or Freddie Mac 0.50%
  • Fannie Mae or Freddie Mac 0.48%

Open IUSB 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.