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ETF comparison

MUB vs SUB

Both US Municipal Bond.

iShares National Muni Bond ETF · iShares Short-Term National Muni Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
8.4 %

539 positions appear in both funds. Buying equal dollars of MUB and SUB would leave roughly 8.4% of each dollar exposed to the same underlying securities.

MUB only 91.0% Shared 8.4% SUB only 91.7%
In MUB only
5,725 positions
Shared
539 positions
In SUB only
2,244 positions

Side by side

MUB

iShares National Muni Bond ETF

iShares · US Municipal Bond

97 composite / 100
Expense ratio
0.050%
Net assets
$45.82B
TTM yield
3.19%
Top-10 conc.
2.0%
SUB

iShares Short-Term National Muni Bond ETF

iShares · US Municipal Bond

96 composite / 100
Expense ratio
0.070%
Net assets
$11.38B
TTM yield
2.54%
Top-10 conc.
3.6%

Sub-score comparison

95
Cost
93
93
Tax efficiency
93
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
MUB sub-score SUB

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

MUB is 2 bps cheaper than SUB. On a $100,000 position that's about $20/yr more in fees for SUB.

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 MUB vs SUB.

Top shared holdings

539 shared in total
# Holding In MUB In SUB Overlap
1 BlackRock Liquidity Funds 0.56% 1.00% 0.56%
2 Connecticut State Health & Educational Facilities Authority 0.20% 0.23% 0.20%
3 State of New Jersey 0.13% 0.18% 0.13%
4 East County Advanced Water Purification Joint Powers Authority 0.12% 0.18% 0.12%
5 State of Illinois 0.11% 0.14% 0.11%
6 Commonwealth of Pennsylvania 0.09% 0.09% 0.09%
7 Maryland Stadium Authority 0.09% 0.09% 0.09%
8 New York City Municipal Water Finance Authority 0.08% 0.09% 0.08%
9 County of King 0.07% 0.21% 0.07%
10 City of Seattle 0.07% 0.19% 0.07%
11 New Jersey Economic Development Authority 0.07% 0.38% 0.07%
12 City of Houston Combined Utility System 0.07% 0.21% 0.07%

Only in MUB

5,725 total
  • Board of Regents of the University of Texas System 0.21%
  • 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 California 0.13%
  • State of Washington 0.13%
  • Pennsylvania Turnpike Commission 0.12%

Only in SUB

2,244 total
  • County of King 0.36%
  • State of California 0.29%
  • New Jersey Turnpike Authority 0.26%
  • Pennsylvania Turnpike Commission 0.26%
  • State of California 0.25%
  • State of California 0.25%
  • Empire State Development Corp. 0.23%
  • State of Connecticut Special Tax 0.22%
  • New York City Transitional Finance Authority Future Tax Secured 0.22%
  • Commonwealth of Pennsylvania 0.21%

Open MUB or SUB at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

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.