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ETF comparison

EAGG vs MBB

Both US Aggregate Bond.

iShares ESG U.S. Aggregate Bond ETF · iShares MBS ETF

Holdings overlap

Weighted by ISIN/CUSIP
13.5 %

677 positions appear in both funds. Buying equal dollars of EAGG and MBB would leave roughly 13.5% of each dollar exposed to the same underlying securities.

EAGG only 85.1% Shared 13.5% MBB only 90.8%
In EAGG only
4,561 positions
Shared
677 positions
In MBB only
10,474 positions

Side by side

EAGG

iShares ESG U.S. Aggregate Bond ETF

iShares · US Aggregate Bond

83 composite / 100
Expense ratio
0.10%
Net assets
$4.90B
TTM yield
4.02%
Top-10 conc.
8.5%
MBB

iShares MBS ETF

iShares · US Aggregate Bond

88 composite / 100
Expense ratio
0.040%
Net assets
$39.63B
TTM yield
4.30%
Top-10 conc.
11.7%

Sub-score comparison

90
Cost
96
52
Tax efficiency
52
87
Liquidity
100
100
Concentration
98
—
Tracking quality
—
EAGG sub-score MBB

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

Cost difference

MBB is 6 bps cheaper than EAGG. On a $100,000 position that's about $60/yr more in fees for EAGG.

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 EAGG vs MBB.

Top shared holdings

677 shared in total
# Holding In EAGG In MBB Overlap
1 Freddie Mac 0.46% 0.35% 0.35%
2 UMBS, TBA 0.32% 0.35% 0.32%
3 BlackRock Funds III 0.28% 5.90% 0.28%
4 UMBS, TBA 0.22% 0.57% 0.22%
5 Government National Mortgage Association 0.19% 1.00% 0.19%
6 UMBS, TBA 0.18% 0.25% 0.18%
7 Government National Mortgage Association 0.16% 0.42% 0.16%
8 Government National Mortgage Association 0.16% 0.32% 0.16%
9 Government National Mortgage Association 0.13% 0.31% 0.13%
10 Fannie Mae 0.13% 0.14% 0.13%
11 Government National Mortgage Association 0.13% 0.29% 0.13%
12 Government National Mortgage Association 0.12% 0.53% 0.12%

Only in EAGG

4,561 total
  • United States Treasury 0.44%
  • United States Treasury 0.43%
  • United States Treasury 0.43%
  • United States Treasury 0.42%
  • United States Treasury 0.40%
  • United States Treasury 0.40%
  • United States Treasury 0.39%
  • United States Treasury 0.37%
  • United States Treasury 0.37%
  • United States Treasury 0.36%

Only in MBB

10,474 total
  • Government National Mortgage Association 0.56%
  • Fannie Mae 0.45%
  • Fannie Mae 0.45%
  • Fannie Mae 0.33%
  • Fannie Mae 0.29%
  • Government National Mortgage Association 0.28%
  • Fannie Mae 0.23%
  • Government National Mortgage Association 0.23%
  • Government National Mortgage Association 0.23%
  • Freddie Mac 0.23%

Open EAGG or MBB 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.