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ETF comparison

AGG vs USIG

US Aggregate Bond vs US Corporate Bond.

iShares Core U.S. Aggregate Bond ETF · iShares Broad USD Investment Grade Corporate Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
24.1 %

8,727 positions appear in both funds. Buying equal dollars of AGG and USIG would leave roughly 24.1% of each dollar exposed to the same underlying securities.

AGG unmatched 74.3% Shared 24.1% USIG unmatched 74.0%

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
4,655 positions
Shared
8,727 positions
In USIG only
2,776 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%
USIG

iShares Broad USD Investment Grade Corporate Bond ETF

iShares · US Corporate Bond

89 composite / 100
Expense ratio
0.040%
Net assets
$18.01B
TTM yield
4.53%
Top-10 conc.
0.7%

Sub-score comparison

97
Cost
96
53
Tax efficiency
51
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
AGG sub-score USIG

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

Cost difference

AGG is 1 bps cheaper than USIG. On a $100,000 position that's about $10/yr more in fees for USIG.

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 USIG.

Top shared holdings

8,727 shared in total
# Holding In AGG In USIG Overlap
1 CHARTER COMM OPT LLC/CAP 0.03% 0.08% 0.03%
2 ANHEUSER-BUSCH CO/INBEV 0.03% 0.08% 0.03%
3 T-MOBILE USA INC 0.02% 0.07% 0.02%
4 CVS HEALTH CORP 0.02% 0.07% 0.02%
5 META PLATFORMS INC 0.02% 0.05% 0.02%
6 CHARTER COMM OPT LLC/CAP 0.02% 0.06% 0.02%
7 AMAZON.COM INC 0.02% 0.06% 0.02%
8 SPACE EXPLORATION TECH 0.02% 0.07% 0.02%
9 BANK OF AMERICA CORP 0.02% 0.08% 0.02%
10 BANK OF AMERICA CORP 0.02% 0.05% 0.02%
11 GOLDMAN SACHS GROUP INC 0.02% 0.06% 0.02%
12 ABBVIE INC 0.02% 0.06% 0.02%

Only in AGG

4,655 total
  • United States Treasury 0.41%
  • United States Treasury 0.40%
  • United States Treasury 0.40%
  • United States Treasury 0.40%
  • United States Treasury 0.39%
  • United States Treasury 0.39%
  • United States Treasury 0.39%
  • United States Treasury 0.38%
  • United States Treasury 0.38%
  • United States Treasury 0.38%

Only in USIG

2,776 total
  • EAGLE FUNDING LUXCO SARL 0.08%
  • MARS INC 0.05%
  • MARS INC 0.05%
  • QTS FAYETTEV I DC1-2/TRS 0.04%
  • BEACON POINT DC LLC 0.04%
  • UBS GROUP AG 0.04%
  • MARS INC 0.04%
  • BAYER US FINANCE II LLC 0.04%
  • UBS GROUP AG 0.03%
  • HUT 8 DC LLC 0.03%

Percentages are holdings overlap with the named fund.

Open AGG or USIG at a brokerage

Both funds trade commission-free at major US brokerages.

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.