MUB vs TAXF
iShares National Muni Bond ETF against American Century Diversified Municipal Bond ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
1%
81 shared positions
Fee gap
22 bp
MUB is cheaper
1-year return gap
0.3 pts
MUB is ahead
Larger fund
MUB
$52.1B
Side by side
| MUB | TAXF | |
|---|---|---|
| Fund | iShares National Muni Bond ETF | American Century Diversified Municipal Bond ETF |
| Issuer | iShares | American Century |
| Category | National Muni | National Muni |
| Expense ratio | 0.05% | 0.27% |
| Assets | $52.1B | $707M |
| Average daily dollar volume | $1.8B | $8.7M |
| Listed | Sep 7, 2007 | Sep 10, 2018 |
| FrenzyCap score | 99 | 67 |
| 1-month return | −0.3% | −0.7% |
| 3-month return | −2.7% | −3.2% |
| Year to date | −4.3% | −4.6% |
| 1-year return | −4.7% | −5.1% |
| 30-day volatility | 6.3% | 7.9% |
| Worst drawdown, 1 year | −7.9% | −8.6% |
| Trailing 12-month yield | 3.33% | 4.00% |
| Holdings | 7,665 | 755 |
| Top 10 weight | 1.2% | 7.5% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | +$2.4B thru May 2026 | +$90M thru May 2026 |
| 30-day implied volatility | 7.5% | — |
| Holdings as of | as of Oct 20, 2026issuer data | as of May 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
1% of MUB · 13% of TAXF| Holding | MUB | TAXF |
|---|---|---|
| ILLINOIS ST 5%, due Nov 1, 2027 | 0.10% | 0.34% |
| SALT RIV PROJ AGRIC IMPT & PWR 5%, due Jan 1, 2050 | 0.06% | 0.32% |
| TEXAS WTR DEV BRD REV 5%, due Aug 1, 2041 | 0.06% | 0.18% |
| OMAHA PUB PWR DIST NEB ELEC RE 5.5%, due Feb 1, 2054 | 0.05% | 0.16% |
| FORT BEND TEX INDPT SCH DIST 4%, due Aug 1, 2027 | 0.04% | 0.21% |
| ILLINOIS ST 5%, due Nov 1, 2029 | 0.04% | 0.12% |
| SAN ANTONIO TEX ELEC & GAS REV 3.08%, due Dec 1, 2028 | 0.04% | 0.11% |
| NEW YORK N Y CITY MUN WTR FIN 5.25%, due Jun 15, 2052 | 0.03% | 0.08% |
| TRIBOROUGH BRDG & TUNL AUTH N 5.25%, due May 15, 2052 | 0.03% | 0.12% |
| MICHIGAN ST BLDG AUTH REV 4%, due Oct 15, 2049 | 0.03% | 0.12% |
| NEW YORK N Y 5%, due Mar 1, 2050 | 0.03% | 0.11% |
| ILLINOIS ST 5.5%, due Apr 1, 2051 | 0.03% | 0.40% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2048 | 0.03% | 0.10% |
| NEW YORK ST URBAN DEV CORP REV 5%, due Mar 15, 2050 | 0.02% | 0.16% |
| ILLINOIS ST TOLL HWY AUTH TOLL 4%, due Jan 1, 2042 | 0.02% | 0.15% |
| TEXAS WATER DEV BRD 4%, due Oct 15, 2043 | 0.02% | 0.09% |
| CENTRAL TEX REGL MOBILITY AUTH 4%, due Jan 1, 2051 | 0.02% | 0.18% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2040 | 0.02% | 0.15% |
| NEW YORK N Y 5.25%, due May 1, 2041 | 0.02% | 0.03% |
| MARYLAND ST 5%, due Jun 1, 2036 | 0.02% | 0.25% |
| NEW YORK ST DORM AUTH ST PERS 5.25%, due Mar 15, 2052 | 0.02% | 0.15% |
| LOWER COLO RIV AUTH TEX REV 5%, due May 15, 2032 | 0.02% | 0.06% |
| DISTRICT COLUMBIA WTR & SWR AU 4%, due Oct 1, 2051 | 0.02% | 0.07% |
| CHICAGO ILL 5.25%, due Jan 1, 2038 | 0.01% | 0.16% |
| NEW YORK N Y 4%, due Aug 1, 2044 | 0.01% | 0.14% |
Sector mix of the stock holdings
No sector breakdown: these funds hold few classified stocks.
More: full overlap table · MUB holdings · TAXF 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.