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ETF comparison

MBB vs PAAA

Both US Aggregate Bond.

iShares MBS ETF · PGIM AAA CLO ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

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

MBB unmatched 98.2% Shared 0.0% PAAA unmatched 95.9%

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 MBB only
11,209 positions
Shared
0 positions
In PAAA only
311 positions

Side by side

MBB

iShares MBS ETF

iShares · US Aggregate Bond

89 composite / 100
Expense ratio
0.040%
Net assets
$35.89B
TTM yield
4.09%
Top-10 conc.
6.6%
PAAA

PGIM AAA CLO ETF

PGIM · US Aggregate Bond

82 composite / 100
Expense ratio
0.19%
Net assets
$15.01B
TTM yield
4.63%
Top-10 conc.
11.7%

Sub-score comparison

96
Cost
81
52
Tax efficiency
51
100
Liquidity
100
100
Concentration
98
—
Tracking quality
—
MBB sub-score PAAA

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

Cost difference

MBB is 15 bps cheaper than PAAA. On a $100,000 position that's about $150/yr more in fees for PAAA.

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 MBB vs PAAA.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in MBB

11,209 total
  • Government National Mortgage Association 1.05%
  • Freddie Mac 0.98%
  • UMBS, TBA 0.85%
  • UMBS, TBA 0.70%
  • Government National Mortgage Association 0.53%
  • Government National Mortgage Association 0.51%
  • Government National Mortgage Association 0.51%
  • Government National Mortgage Association 0.50%
  • Government National Mortgage Association 0.49%
  • Fannie Mae 0.49%

Only in PAAA

311 total
  • CBAM 2017-2 LTD 1.58%
  • Regatta XXVII Funding Ltd / Regatta XXVII Funding LLC 1.29%
  • BENEFIT STREET PARTNERS CLO XII-B LTD 1.21%
  • GOLDENTREE LOAN MANAGEMENT US CLO 31 LTD 1.21%
  • MAGNETITE XL LTD 1.13%
  • OCP CLO LTD 1.12%
  • BATTALION CLO XXIV LTD 1.09%
  • AGL CORE CLO 1.06%
  • REGATTA XXVI FUNDING LTD 1.01%
  • BALBOA BAY LOAN FUNDING 2024-1 LTD 1.01%

Related comparisons

More comparisons with MBB

More comparisons with PAAA

Percentages are holdings overlap with the named fund.

Open MBB or PAAA 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.