MUB vs MUST
iShares National Muni Bond ETF against Columbia Multi-Sector Municipal Income ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
2%
122 shared positions
Fee gap
18 bp
MUB is cheaper
1-year return gap
1.2 pts
MUB is ahead
Larger fund
MUB
$52.1B
Side by side
| MUB | MUST | |
|---|---|---|
| Fund | iShares National Muni Bond ETF | Columbia Multi-Sector Municipal Income ETF |
| Issuer | iShares | Columbia |
| Category | National Muni | National Muni |
| Expense ratio | 0.05% | 0.23% |
| Assets | $52.1B | $515M |
| Average daily dollar volume | $1.8B | $6.9M |
| Listed | Sep 7, 2007 | Oct 10, 2018 |
| FrenzyCap score | 99 | 68 |
| 1-month return | −0.3% | +0.1% |
| 3-month return | −2.7% | −3.4% |
| Year to date | −4.3% | −5.3% |
| 1-year return | −4.7% | −5.9% |
| 30-day volatility | 6.3% | 9.2% |
| Worst drawdown, 1 year | −7.9% | −10.2% |
| Trailing 12-month yield | 3.33% | 3.53% |
| Holdings | 7,665 | 645 |
| Top 10 weight | 1.2% | 4.5% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | +$2.4B thru May 2026 | +$8.2M thru Jul 2026 |
| 30-day implied volatility | 7.5% | — |
| Holdings as of | as of Oct 20, 2026issuer data | as of Jul 31, 2026SEC filing |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
Largest shared holdings
2% of MUB · 21% of MUST| Holding | MUB | MUST |
|---|---|---|
| OHIO ST WTR DEV AUTH WTR POLLU 5%, due Dec 1, 2035 | 0.10% | 0.24% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2032 | 0.07% | 0.30% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2036 | 0.06% | 0.13% |
| CHICAGO ILL O HARE INTL ARPT R 5%, due Jan 1, 2048 | 0.05% | 0.38% |
| NORTH TEX TWY AUTH REV 5%, due Jan 1, 2032 | 0.05% | 0.21% |
| SAN ANTONIO TEX ELEC & GAS REV 5%, due Feb 1, 2039 | 0.04% | 0.18% |
| NEW YORK ST TWY AUTH GEN REV 5%, due Jan 1, 2031 | 0.04% | 0.20% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2033 | 0.04% | 0.22% |
| MASSACHUSETTS ST DEV FIN AGY 5%, due Oct 1, 2038 | 0.04% | 0.28% |
| MASSACHUSETTS ST 5.5%, due Aug 1, 2030 | 0.04% | 0.09% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2039 | 0.04% | 0.29% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2038 | 0.03% | 0.09% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2032 | 0.03% | 0.18% |
| MASSACHUSETTS ST DEV FIN AGY R 5%, due Oct 1, 2036 | 0.03% | 0.19% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2033 | 0.03% | 0.09% |
| NORTH CAROLINA CAPITAL FACILITIES 5%, due Jan 1, 2036 | 0.03% | 0.19% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2033 | 0.03% | 0.18% |
| TEXAS TRANSN COMMN CENT TEX TP 5%, due Aug 15, 2038 | 0.03% | 0.27% |
| TRIBOROUGH BRIDGE & TUNNEL AUTH, due Nov 15, 2032 | 0.03% | 0.03% |
| TEXAS TRANSN COMMN CENT TEX TP 5%, due Aug 15, 2038 | 0.03% | 0.14% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2033 | 0.03% | 0.18% |
| BROWARD CNTY FLA SCH BRD CTFS 5%, due Jul 1, 2035 | 0.03% | 0.24% |
| DISTRICT COLUMBIA 5%, due Oct 15, 2032 | 0.03% | 0.04% |
| AMERICAN MUN PWR OHIO INC REV 5%, due Feb 15, 2035 | 0.02% | 0.18% |
| GREAT LAKES WTR AUTH MICH WTR 5%, due Jul 1, 2031 | 0.02% | 0.28% |
Sector mix of the stock holdings
No sector breakdown: these funds hold few classified stocks.
More: full overlap table · MUB holdings · MUST holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.