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The RBB Fund, Inc. F/m Ultrashort Tax-Free Municipal ETF (ZMUN): ETF

ETF traded on XNAS under symbol ZMUN. Quoted in usd.

The RBB Fund, Inc. F/m Ultrashort Tax-Free Municipal ETF logo

The RBB Fund, Inc. F/m Ultrashort Tax-Free Municipal ETF

+0.00%$49.95
XNAS:ZMUNFixed Income
AUM $37.47M·YTD --·Yield --
The RBB Fund, Inc. F/m Ultrashort Tax-Free Municipal ETF logoXNAS:ZMUN$49.95+0.00%
About ZMUN

The F/m Callable Tax-Free Municipal ETF functions as a passively managed exchange-traded fund (ETF), aiming to mirror the price and yield characteristics of the Bloomberg Municipal Bond Currently Callable Index. Its investment strategy focuses on acquiring U.S. municipal bonds that carry an investment-grade rating. These bonds are specifically chosen for being at or nearing their call dates and for offering attractive coupon rates. This method is designed to provide investors with tax-exempt income while actively mitigating the risks associated with bond calls. The fund's portfolio is, therefore, largely comprised of investment-grade municipal debt securities that feature callable provisions.

Largest holdings

  1. Cash & Other2.69%
  2. New York State Dormitory Authority 5% 02/15/20302.54%
  3. South Dakota Health & Educational Facilities Authority 4% 11/01/20342.38%
  4. Indiana Finance Authority 5% 06/01/20271.93%
  5. City of Aurora CO 5% 12/01/20351.64%
  6. Illinois Finance Authority 5% 11/15/20281.61%
  7. State of Illinois 5% 01/01/20271.60%
  8. Oregon State Facilities Authority 5% 06/01/20301.53%
  9. City & County of Denver CO Airport System Revenue 5% 11/15/20321.47%
  10. Metropolitan Transportation Authority 5% 11/15/20371.44%
Full holdings, sectors and countries
Dividend History
Benchmark Comparison
Compared against
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Total Invested
$70,000
Final Portfolio
$111,503
Total Return
+$41,503
(+59.3%)
Dividends Reinvested
$0
compounded into portfolio
Defaults are seeded from historical performance and trailing twelve-month yield. Past performance is not a forecast. Feel free to adjust any input to model your own assumptions.
ETF Key Metrics
AUM$37.47M
NAV$49.96
Premium/Discount-0.01%
Expense Ratio0.30%
Market Cap--
Shares Outstanding--
Inception DateSep. 30, 2025
Fund Details
IssuerF/m
Asset ClassFixed Income
Beta--
SectorFinancial Services
DomicileUS
52-Week Range
$49.32$50.51
Current: $49.95
Volume
Avg Volume5.85K

30d

5.13K

60d

5.04K

90d

5.25K

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