ETF comparison
CMF vs MUB
Both US Municipal Bond.
iShares California Muni Bond ETF · iShares National Muni Bond ETF
Holdings overlap
565 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.
Side by side
Sub-score comparison
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
565 shared in total| # | Holding | In CMF | In MUB | Overlap |
|---|---|---|---|---|
| 1 | East County Advanced Water Purification Joint Powers Authority | 0.35% | 0.12% | 0.12% |
| 2 | State of California | 0.18% | 0.12% | 0.12% |
| 3 | San Diego Unified School District | 0.12% | 0.10% | 0.10% |
| 4 | University of California | 0.11% | 0.10% | 0.10% |
| 5 | University of California | 0.18% | 0.09% | 0.09% |
| 6 | Foothill-Eastern Transportation Corridor Agency | 0.31% | 0.09% | 0.09% |
| 7 | State of California | 0.11% | 0.09% | 0.09% |
| 8 | Southern California Public Power Authority | 0.16% | 0.08% | 0.08% |
| 9 | University of California | 0.17% | 0.07% | 0.07% |
| 10 | Los Angeles Unified School District | 0.07% | 0.10% | 0.07% |
| 11 | University of California | 0.11% | 0.07% | 0.07% |
| 12 | State of California | 0.21% | 0.07% | 0.07% |
Only in CMF
960 total- University of California 0.53%
- California Educational Facilities Authority 0.49%
- San Francisco City & County Airport Comm-San Francisco International Airport 0.41%
- Orange County Water District 0.40%
- University of California 0.36%
- Bay Area Toll Authority 0.34%
- San Francisco City & County Public Utilities Commission Wastewater 0.30%
- University of California 0.30%
- Los Angeles Community College District 0.30%
- California State Public Works Board 0.28%
Only in MUB
5,699 total- Board of Regents of the University of Texas System 0.21%
- Connecticut State Health & Educational Facilities Authority 0.20%
- City of Atlanta Water & Wastewater 0.19%
- Northwest Independent School District 0.16%
- New York State Thruway Authority 0.16%
- Houston Higher Education Finance Corp. 0.15%
- New York State Dormitory Authority 0.14%
- Ohio State University (The) 0.14%
- State of New Jersey 0.13%
- State of Washington 0.13%
Open CMF or MUB at a brokerage
Both funds trade commission-free at major US brokerages.
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.