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ETF comparison

CMF vs MUB

Both US Municipal Bond.

iShares California Muni Bond ETF · iShares National Muni Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
9.0 %

604 positions appear in both funds. Buying equal dollars of CMF and MUB would leave roughly 9.0% of each dollar exposed to the same underlying securities.

CMF unmatched 90.5% Shared 9.0% MUB unmatched 89.3%

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 CMF only
1,018 positions
Shared
604 positions
In MUB only
6,049 positions

Side by side

CMF

iShares California Muni Bond ETF

iShares · US Municipal Bond

92 composite / 100
Expense ratio
0.080%
Net assets
$4.75B
TTM yield
3.03%
Top-10 conc.
4.4%
MUB

iShares National Muni Bond ETF

iShares · US Municipal Bond

97 composite / 100
Expense ratio
0.050%
Net assets
$46.62B
TTM yield
3.29%
Top-10 conc.
1.4%

Sub-score comparison

92
Cost
95
93
Tax efficiency
93
86
Liquidity
100
100
Concentration
100
—
Tracking quality
—
CMF sub-score MUB

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

Cost difference

MUB is 3 bps cheaper than CMF. On a $100,000 position that's about $30/yr more in fees for CMF.

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 CMF vs MUB.

Top shared holdings

604 shared in total
# Holding In CMF In MUB Overlap
1 East County Advanced Water Purification Joint Powers Authority 0.33% 0.11% 0.11%
2 State of California 0.17% 0.11% 0.11%
3 San Diego Unified School District 0.11% 0.10% 0.10%
4 University of California 0.10% 0.09% 0.09%
5 University of California 0.16% 0.08% 0.08%
6 Foothill-Eastern Transportation Corridor Agency 0.29% 0.08% 0.08%
7 State of California 0.10% 0.08% 0.08%
8 Southern California Public Power Authority 0.15% 0.07% 0.07%
9 University of California 0.16% 0.07% 0.07%
10 Los Angeles Unified School District 0.07% 0.09% 0.07%
11 State of California 0.19% 0.06% 0.06%
12 City of Los Angeles 0.21% 0.06% 0.06%

Only in CMF

1,018 total
  • University of California 0.49%
  • Bay Area Toll Authority 0.46%
  • California Educational Facilities Authority 0.44%
  • Eastern Municipal Water District 0.44%
  • Bay Area Toll Authority 0.37%
  • Anaheim Housing & Public Improvements Authority 0.33%
  • San Mateo County Transit District Sales Tax 0.32%
  • Bay Area Toll Authority 0.29%
  • San Francisco City & County Public Utilities Commission Wastewater 0.28%
  • University of California 0.27%

Only in MUB

6,049 total
  • Board of Regents of the University of Texas System 0.19%
  • New York State Thruway Authority 0.15%
  • San Antonio Water System 0.14%
  • Triborough Bridge & Tunnel Authority 0.14%
  • New York City Transitional Finance Authority Future Tax Secured 0.13%
  • New York State Dormitory Authority 0.13%
  • Ohio State University (The) 0.13%
  • Houston Higher Education Finance Corp. 0.13%
  • Northwest Independent School District 0.13%
  • State of New Jersey 0.13%

Related comparisons

More comparisons with CMF

More comparisons with MUB

Percentages are holdings overlap with the named fund.

Open CMF or MUB 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.