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Wednesday, August 19, 2026The Morning Brief →Sign in
MUBISharesINDEX

iShares National Muni Bond ETF

$105.68+0.29% today
10410952-WK

The fund will invest at least 80% of its assets in the component securities of the underlying index and it will invest at least 90% of its assets in fixed income securities of the types included in the underlying index that BFA believes will help the fund track the underlying index. The underlying index includes municipal bonds, the interest of which is exempt from Federal income taxes and not subject to alternative minimum tax.

Price & daily flows
107.8106.4105.0105.68DAILY NET FLOWAug 19Dec 16Apr 17Aug 19

SOURCE: MARKET TAPE & DAILY CREATION/REDEMPTION RECORDS · 1Y SHOWN · NET +$6.7B OVER THIS RANGE

The desk’s read

Money keeps arriving — +$723M of net buying over the past month, about 1.6% of the fund's asset base, while the price has returned -1.5% so far this year. At 0.050% a year, nothing comparable on our shelf runs cheaper.

COMPOSED FROM THE FUND’S OWN DAILY RECORDS · UPDATED WITH EACH REFRESH

$45.7Bassets under management
0.050%expense ratio · $5 per $10,000 a year
+$723Mnet flow, trailing month
4.6Mavg daily volume, 30 days
5722holdings · US-domiciled
2007listed September 6, 2007 · beta 0.09
The book at a glance
0.2%0.2%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%0.1%

CELL SIZE IS PORTFOLIO WEIGHT · COLOR IS TODAY’S MOVE · TOP 40 POSITIONS

HoldingsDownload CSV
#HoldingWeightPriceDay52-wk
1ATLANTA GA WTR & WASTE WTR REV0.19%
2NEW YORK ST TWY AUTH ST PERS I0.16%
3NEW YORK ST DORM AUTH ST PERS0.13%
4HOUSTON TEX HIGHER ED FIN CORP0.13%
5NORTHWEST TEX INDPT SCH DIST0.13%
6OHIO ST UNIV GEN RCPTS0.13%
7NEW JERSEY ST0.13%
8WASHINGTON ST0.13%
9CALIFORNIA ST0.13%
10CHICAGO ILL TRAN AUTH SALES TA0.12%
11EAST CNTY ADVANCED WTR PURIFIC EAWWTR 09/26 FIXED 3.1250.11%
12NEW JERSEY ST EDL FACS AUTH RE0.11%
13WASHOE CNTY NEV SCH DIST0.11%
14ILLINOIS ST0.11%
15MASSACHUSETTS ST0.11%

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Sector weights
State Tax-Backed29.73%
Local Tax-Backed18.39%
Utility17.14%
Transportation11%
School Districts9.71%
Education8.01%
Cash and/or Derivatives2.66%
Prerefund/Escrow0.96%
PORTFOLIO COMPOSITION, LATEST DISCLOSURE
Performance
1 week-0.3%
1 month-0.8%
3 months-0.4%
6 months-2.4%
YTD-1.5%
1 year
3 years

PRICE RETURN, DISTRIBUTIONS NOT REINVESTED

Net flows
1 week+$138M
1 month+$723M
3 months+$2.1B
YTD+$4.9B
1 year+$6.7B

CREATION/REDEMPTION DOLLARS, DAILY RECORDS

Monthly net flows
AugSepOctNovDecJanFebMarAprMayJulAug
DAILY CREATION/REDEMPTION RECORDS, TRAILING TWELVE MONTHS
The risk read
4%realized volatility, 30 days (annualized)
3%realized volatility, 1 year
-3.4%deepest fall from a peak, 1 year
-3.0%where it sits vs. that peak today

The top holding is 0.2% of the book; the top ten carry 1%. Spread across 250+ names, it behaves like roughly 225 equally-weighted positions.

VOLATILITY & DRAWDOWN FROM THE DAILY TAPE · CONCENTRATION FROM THE LATEST DISCLOSED BOOK

Options tape
6Kcalls today
5Kputs today
0.83put/call ratio
3.9Mshares traded
The case against MUB

Due diligence cuts both ways. These funds sit on the same shelf and beat MUB on at least one dimension that matters — the fee, the asset base, or where the money is going.

FundFeeAssetsFlow, 1MThe case
STIP iShares 0-5 Year TIPS Bond ETF0.03%$16B+$288M-2bp on fee · +$288M in over the monthHead-to-head
MBB iShares MBS ETF0.04%$39B+$26M-1bp on fee · +$26M in over the monthHead-to-head
IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF0.04%$23.4B+$520M-1bp on fee · +$520M in over the monthHead-to-head
IGIB iShares 5-10 Year Investment Grade Corporate Bond ETF0.04%$18.7B+$312M-1bp on fee · +$312M in over the monthHead-to-head
GOVT iShares U.S. Treasury Bond ETF0.05%$43.8B+$304M+$304M in over the monthHead-to-head
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InstrumentsHarvest substitutesTrade cost at $1MClient tearsheetStress this fund
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