SMMU vs SUB: Differences, Returns & Fees

SMMU's duration was 1.7 years on Jun 30, 2026 and SUB's 1.8 on May 31, 2026; SUB charges 0.07% to SMMU's 0.35%. Net assets: $1.1bn on Jun 30, 2026 for PIMCO Short Term Municipal Bond Active Exchange-Traded Fund, and $12.3bn on Oct 9, 2026 for iShares Short-Term National Muni Bond ETF.

SUB costs 0.28 points a year less; their one-year returns differ by 0.3 points; SUB is 9.9 times larger.

SMMUSUB
Expense ratio0.35%0.07%
Net assets, as of Jun 30, 2026$1.1bn$11.4bn
Total return, 1 year+1.1%+0.8%
What it tracksNo index, actively managedICE Short Maturity AMT-Free US National Municipal Index
Holdings in common1%

Holdings in common uses holdings dated May 31, 2026 and Jun 30, 2026.

+1.1%
SMMU total return, 1 year
+0.8%
SUB total return, 1 year
0.35%
SMMU expense ratio
0.07%
SUB expense ratio

What they hold in common

By the books each fund has filed, SMMU and SUB hold 1% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated May 31, 2026 and Jun 30, 2026.

half

1% in common

Positions both hold, largest shared weight first
Holding SMMU SUB
New Jersey Economic Development Authority, due Mar 1, 2028 0.20% 0.37%
State of New Jersey, due Jun 1, 2028 0.18% 0.17%
State of Illinois, due May 1, 2030 0.71% 0.10%
Long Island Power Authority, due Sep 1, 2055 0.34% 0.09%
City of San Antonio Electric & Gas Systems Revenue, due Feb 1, 2055 0.39% 0.09%
Nebraska Public Power District, due Jul 1, 2028 0.16% 0.08%
Dallas Independent School District, due Feb 15, 2055 0.64% 0.08%
New York City Transitional Finance Authority Future Tax Secured Revenue, due Nov 1, 2054 0.09% 0.06%
Dallas Fort Worth International Airport, due Nov 1, 2028 0.18% 0.06%
Chicago Midway International Airport, due Jan 1, 2029 0.18% 0.03%
Fort Bend Independent School District, due Aug 1, 2055 1.25% 0.03%
Denton Independent School District, due Aug 15, 2055 0.18% 0.03%
Only in SMMU
U.S. Treasury Notes, due Feb 29, 2028 2.24%
U.S. Treasury Notes, due Feb 28, 2031 1.81%
Connecticut State Health & Educational Facilities Authority, due Jul 1, 2057 1.75%
Federal Home Loan Bank Discount Notes, due Sep 4, 2026 1.68%
New York City Municipal Water Finance Authority, due Jun 15, 2050 1.34%
Tarrant County Cultural Education Facilities Finance Corp., due Nov 15, 2063 1.22%
U.S. Treasury Notes, due Apr 30, 2031 1.19%
Miami-Dade County Housing Finance Authority, due Feb 1, 2044 1.10%
Only in SUB
County of King, Series 2024, due Jan 1, 2042 0.35%
San Antonio Water System, Series 2025D, due May 1, 2055 0.28%
City of Seattle, Series 2023B, due Nov 1, 2046 0.27%
State of California, due Aug 1, 2029 0.27%
Empire State Development Corp., Series 2022A, due Sep 15, 2028 0.25%
Pennsylvania Turnpike Commission, Series 2023B, due Dec 1, 2043 0.25%
University of California, Series 2025CD, due May 15, 2030 0.25%
New Jersey Turnpike Authority, Series 2025B, due Jan 1, 2030 0.25%

Check overlap with more funds →

On the same fields

SMMU
PIMCO Short Term Municipal Bond Active Exchange-Traded Fund
SUB
iShares Short-Term National Muni Bond ETF
Where it sits Bond ETF Bond ETF
Issuer PIMCO iShares
What it is Actively managed Tracks an index
Total return, 1 year +1.1% +0.8%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 −16.1 pts −16.4 pts
Expense ratio 0.35% 0.07%
Holdings 348 3057
Net assets, SMMU as of Jun 30, 2026 and SUB as of Oct 9, 2026 $1.1bn $12.3bn

SMMU and SUB on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

SMMU in plain words

SMMU is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned +1.1% with distributions reinvested. The prospectus expense ratio is 0.35% a year.

SUB in plain words

SUB tracks an index. Over the year to Oct 9, 2026 it returned +0.8% with distributions reinvested. The prospectus expense ratio is 0.07% a year.

Questions people ask

Which returned more over the last year, SMMU or SUB?
In the year to Oct 9, 2026, with distributions reinvested, SMMU returned +1.1% and SUB +0.8%.
Which is cheaper, SMMU or SUB?
SUB is cheaper, by 0.28 percentage points a year. That is about $28 on $10,000 held for a year. Fees come from each fund's prospectus.
Cite this pageCitation, APA and Markdown

ETFIQ, SMMU against SUB, data as of Oct 9, 2026. https://etfiq.com/compare/any/smmu-vs-sub

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.