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ETF comparison

AGG vs BIL

US Aggregate Bond vs US Treasury (Short).

iShares Core U.S. Aggregate Bond ETF · State Street SPDR Bloomberg 1-3 Month T-Bill ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

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

AGG unmatched 98.5% Shared 0.0% BIL unmatched 99.6%

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
13,266 positions
Shared
0 positions
In BIL only
22 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
$135.65B
TTM yield
4.13%
Top-10 conc.
4.0%
BIL

State Street SPDR Bloomberg 1-3 Month T-Bill ETF

State Street · US Treasury (Short)

84 composite / 100
Expense ratio
0.14%
Net assets
$49.79B
TTM yield
3.66%
Top-10 conc.
74.4%

Sub-score comparison

97
Cost
86
52
Tax efficiency
58
100
Liquidity
100
100
Concentration
N/A
—
Tracking quality
—
AGG sub-score BIL

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

Cost difference

AGG is 11 bps cheaper than BIL. On a $100,000 position that's about $105/yr more in fees for BIL.

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 BIL.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in AGG

13,266 total
  • United States Treasury 0.42%
  • United States Treasury 0.41%
  • United States Treasury 0.41%
  • 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 0.39%
  • United States Treasury 0.38%

Only in BIL

22 total
  • United States Treasury 12.04%
  • United States Treasury 9.04%
  • United States Treasury 7.22%
  • United States Treasury 7.03%
  • United States Treasury 6.98%
  • United States Treasury 6.97%
  • United States Treasury 6.85%
  • United States Treasury 6.49%
  • United States Treasury 6.00%
  • United States Treasury 5.82%

Related comparisons

More comparisons with AGG

More comparisons with BIL

Percentages are holdings overlap with the named fund.

Open AGG or BIL 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.