Skip to main content
PlainIndex
Menu

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 98.1% Shared 0.0% PAAA unmatched 96.3%

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
11,144 positions
Shared
0 positions
In PAAA only
329 positions

Side by side

MBB

iShares MBS ETF

iShares · US Aggregate Bond

89 composite / 100
Expense ratio
0.040%
Net assets
$36.25B
TTM yield
4.46%
Top-10 conc.
6.8%
PAAA

PGIM AAA CLO ETF

PGIM · US Aggregate Bond

82 composite / 100
Expense ratio
0.19%
Net assets
$13.92B
TTM yield
4.65%
Top-10 conc.
11.2%

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

11,144 total
  • Freddie Mac 1.05%
  • Government National Mortgage Association 0.95%
  • UMBS, TBA 0.83%
  • Government National Mortgage Association 0.67%
  • UMBS, TBA 0.64%
  • Government National Mortgage Association 0.55%
  • Government National Mortgage Association 0.54%
  • Government National Mortgage Association 0.53%
  • Fannie Mae 0.52%
  • Freddie Mac 0.50%

Only in PAAA

329 total
  • CBAMR LTD 1.92%
  • Regatta XXVII Funding Ltd / Regatta XXVII Funding LLC 1.58%
  • ELEVATION CLO 2021-12 LTD 1.13%
  • OCTAGON INVESTMENT PARTNERS 31 LTD 1.04%
  • Cbam 2020-13 Ltd. 0.99%
  • ELMWOOD CLO 25 LTD 0.99%
  • NEUBERGER BERMAN LOAN ADVISERS CLO 33 LTD 0.96%
  • RR 27 LTD 0.93%
  • AGL CLO I LTD 0.87%
  • RAD CLO 25 LTD 0.80%

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.