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ETF comparison

AGG vs IUSB

Both US Aggregate Bond.

iShares Core U.S. Aggregate Bond ETF · iShares Core Universal USD Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
68.8 %

11,502 positions appear in both funds. Buying equal dollars of AGG and IUSB would leave roughly 68.8% of each dollar exposed to the same underlying securities.

AGG unmatched 29.6% Shared 68.8% IUSB unmatched 29.4%

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 AGG only
1,880 positions
Shared
11,502 positions
In IUSB only
6,542 positions

Side by side

AGG

iShares Core U.S. Aggregate Bond ETF

iShares · US Aggregate Bond

89 composite / 100
Expense ratio
0.030%
Net assets
$139.94B
TTM yield
3.80%
Top-10 conc.
3.9%
IUSB

iShares Core Universal USD Bond ETF

iShares · US Aggregate Bond

88 composite / 100
Expense ratio
0.060%
Net assets
$50.20B
TTM yield
3.98%
Top-10 conc.
3.5%

Sub-score comparison

97
Cost
94
53
Tax efficiency
53
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
AGG sub-score IUSB

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

Cost difference

AGG is 3 bps cheaper than IUSB. On a $100,000 position that's about $30/yr more in fees for IUSB.

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 AGG vs IUSB.

Top shared holdings

11,502 shared in total
# Holding In AGG In IUSB Overlap
1 United States Treasury 0.37% 0.37% 0.37%
2 United States Treasury 0.37% 0.36% 0.36%
3 United States Treasury 0.41% 0.35% 0.35%
4 United States Treasury 0.38% 0.34% 0.34%
5 United States Treasury 0.40% 0.34% 0.34%
6 United States Treasury 0.40% 0.34% 0.34%
7 United States Treasury 0.39% 0.33% 0.33%
8 United States Treasury 0.39% 0.33% 0.33%
9 United States Treasury 0.39% 0.33% 0.33%
10 United States Treasury 0.37% 0.32% 0.32%
11 United States Treasury 0.40% 0.31% 0.31%
12 United States Treasury 0.36% 0.30% 0.30%

Only in AGG

1,880 total
  • Government National Mortgage Association 0.20%
  • UMBS, TBA 0.17%
  • Government National Mortgage Association 0.16%
  • UMBS, TBA 0.15%
  • UMBS, TBA 0.15%
  • Government National Mortgage Association 0.15%
  • UMBS, TBA 0.13%
  • UMBS, TBA 0.12%
  • UMBS, TBA 0.11%
  • United States Treasury 0.10%

Only in IUSB

6,542 total
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.31%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.30%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.26%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.22%
  • Government National Mortgage Association 0.19%
  • Government National Mortgage Association 0.18%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.16%
  • United States of America 0.16%
  • Government National Mortgage Association 0.16%

Related comparisons

More comparisons with AGG

More comparisons with IUSB

Percentages are holdings overlap with the named fund.

Open AGG or IUSB 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.