PlainIndex
Menu

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
68.6 %

11,212 positions appear in both funds. Buying equal dollars of AGG and IUSB would leave roughly 68.6% of each dollar exposed to the same underlying securities.

AGG only 30.4% Shared 68.6% IUSB only 32.6%
In AGG only
1,971 positions
Shared
11,212 positions
In IUSB only
6,567 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
$138.85B
TTM yield
4.01%
Top-10 conc.
7.1%
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%

Sub-score comparison

97
Cost
94
52
Tax efficiency
52
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

11,212 shared in total
# Holding In AGG In IUSB Overlap
1 United States Treasury 0.41% 0.37% 0.37%
2 United States Treasury 0.42% 0.37% 0.37%
3 United States Treasury 0.40% 0.37% 0.37%
4 United States Treasury 0.40% 0.37% 0.37%
5 United States Treasury 0.39% 0.36% 0.36%
6 United States Treasury 0.41% 0.36% 0.36%
7 United States Treasury 0.42% 0.36% 0.36%
8 United States Treasury 0.41% 0.35% 0.35%
9 United States Treasury 0.39% 0.34% 0.34%
10 United States Treasury 0.42% 0.33% 0.33%
11 United States Treasury 0.35% 0.33% 0.33%
12 United States Treasury 0.43% 0.32% 0.32%

Only in AGG

1,971 total
  • United States Treasury 0.27%
  • UMBS, TBA 0.22%
  • United States Treasury 0.21%
  • UMBS, TBA 0.21%
  • United States Treasury 0.20%
  • UMBS, TBA 0.17%
  • UMBS, TBA 0.15%
  • UMBS, TBA 0.13%
  • United States Treasury 0.12%
  • UMBS, TBA 0.12%

Only in IUSB

6,567 total
  • Blackrock Liquidity Tempcash 2.88%
  • United States of America 0.29%
  • United States of America 0.29%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.22%
  • Government National Mortgage Association 0.21%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.20%
  • Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.19%
  • Government National Mortgage Association 0.18%
  • United States of America 0.15%
  • United States of America 0.15%

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.