SUB vs TAFI: Differences, Returns & Fees

On May 31, 2026 SUB's duration was 1.8 years and TAFI's 1.9; SUB charges 0.07% to TAFI's 0.27%. Net assets: $12.3bn on Oct 9, 2026 for iShares Short-Term National Muni Bond ETF, and $1.4bn on Oct 8, 2026 for AB Tax-Aware Short Duration Municipal ETF.

SUB costs 0.20 points a year less; their one-year returns differ by 0.3 points; SUB is 8.6 times larger.

SUBTAFI
Expense ratio0.07%0.27%
Net assets, as of Oct 8, 2026$12.2bn$1.4bn
Total return, 1 year+0.8%+0.5%
What it tracksICE Short Maturity AMT-Free US National Municipal IndexNo index, actively managed
Holdings in common2%

Holdings in common uses holdings dated May 31, 2026.

+0.8%
SUB total return, 1 year
+0.5%
TAFI total return, 1 year
0.07%
SUB expense ratio
0.27%
TAFI expense ratio

What they hold in common

By the books each fund has filed, SUB and TAFI hold 2% 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.

half

2% in common

Positions both hold, largest shared weight first
Holding SUB TAFI
University of California, Series 2025CD, due May 15, 2030 0.25% 0.61%
Colorado State Education Loan Program, Series 2025A, due Jun 30, 2026 0.18% 0.53%
State of California, due Aug 1, 2029 0.27% 0.16%
State of Illinois, Series 2017D, due Nov 1, 2026 0.16% 0.16%
State of Illinois, Series 2017D, due Nov 1, 2027 0.14% 0.20%
City of Los Angeles, due Jun 25, 2026 0.12% 0.40%
New Jersey Transportation Trust Fund Authority, Series 2010A, due Dec 15, 2027 0.14% 0.11%
State of Illinois, Series 2020, due May 1, 2030 0.10% 0.17%
Municipal Electric Authority of Georgia, Series 2016A, due Jan 1, 2028 0.09% 0.15%
Dallas Independent School District, Series 2026B, due Feb 15, 2056 0.09% 0.08%
New Jersey Turnpike Authority, Series 2025B, due Jan 1, 2031 0.07% 0.44%
New Jersey Transportation Trust Fund Authority, Series 2018A, due Jun 15, 2030 0.05% 0.43%
Only in SUB
New Jersey Economic Development Authority, Series 2023RRR, due Mar 1, 2028 0.37%
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%
Empire State Development Corp., Series 2022A, due Sep 15, 2028 0.25%
Pennsylvania Turnpike Commission, Series 2023B, due Dec 1, 2043 0.25%
New Jersey Turnpike Authority, Series 2025B, due Jan 1, 2030 0.25%
State of California, due Nov 1, 2027 0.24%
Only in TAFI
COLORADO ST EDUC LOAN PROGRAM, due Jun 30, 2026 1.53%
TRIBOROUGH NY BRIDGE & TUNNEL AUTH REVENUES, due Jan 1, 2031 0.97%
QUINCY MA, due Jul 24, 2026 0.68%
PUERTO RICO CMWLTH, due Jul 1, 2027 0.63%
ILLINOIS ST FIN AUTH REVENUE, due Nov 15, 2037 0.56%
NEW YORK ST TRANSPRTN DEV CORP SPL FAC REVENUE, due Jan 1, 2030 0.55%
NEW JERSEY ST ECON DEV AUTH, due Sep 1, 2029 0.51%
S E ALABAMA ST GAS SPLY DIST GAS SPLY REVENUE, due Aug 1, 2054 0.50%

Check overlap with more funds →

On the same fields

SUB
iShares Short-Term National Muni Bond ETF
TAFI
AB Tax-Aware Short Duration Municipal ETF
Where it sits Bond ETF Bond ETF
What it is Tracks an index Actively managed
Total return, 1 year +0.8% +0.5%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 −16.4 pts −16.8 pts
Expense ratio 0.07% 0.27%
Holdings 3057 684
Net assets, SUB as of Oct 9, 2026 and TAFI as of Oct 8, 2026 $12.3bn $1.4bn

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

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.

TAFI in plain words

TAFI is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned +0.5% with distributions reinvested. The prospectus expense ratio is 0.27% a year.

Questions people ask

Which returned more over the last year, SUB or TAFI?
In the year to Oct 9, 2026, with distributions reinvested, SUB returned +0.8% and TAFI +0.5%.
Which is cheaper, SUB or TAFI?
SUB is cheaper, by 0.20 percentage points a year. That is about $20 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
Where these figures came from

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Cite this pageCitation, APA and Markdown

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

Open data

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