257 essays 1,087 funds measured independent · not paid by any fund or issuer we cover

Fund · AB Tax-Aware Short Duration Municipal ETF · measured from SEC filings

TAFI holdings

TAFI reports 689 holdings and behaves like 432.2 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-05-31. The fact sheet publishes the first number; this page computes the second, and traces it across 15 quarters of filings.

Measured concentration

as of 2026-05-31
689 Positions reported
432.2 Effective holdings
1.6× Concentration multiple
7.16% Top ten weight

Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 0% at a quoted market price (level 1), one issuer country.

What stands out

as of 2026-05-31

TAFI's largest investment is Colorado ST Educ Loan Program at 1.53% of net assets. Triborough NY Bridge & Tunnel Auth Revenues and Quincy MA follow; the three together are 3.17%. Ten companies are 7.16% of the fund; the other 679 share the rest. Among the 192 bond funds measured here, TAFI behaves like 432.2 holdings against a median of 236.4 — 1.8 times the median. Across 15 quarterly filings TAFI has become less concentrated: it behaved like 48.6 at 2022-11-30 and 432.2 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 108 positions were added and 37 dropped; 17.1% of the weight moved.

Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable bond funds on this site. Nothing here is a view on the fund.

Every filing since 2022

15

Between 2022-11-30 and 2026-05-31, TAFI went from behaving like 48.6 equally weighted positions to 432.2 — 789% more, while its top ten went from 28.89% to 7.16% of net assets. Read across the funds on the concentration-over-time table.

PeriodHoldingsEffective Top 10Largest
2026-05-31 689 432.2 7.16% 1.55%
2026-02-28 619 350.6 9.01% 1.69%
2025-11-30 584 311.8 8.58% 2.97%
2025-08-31 512 354.9 7.39% 0.91%
2025-05-31 499 359.7 6.86% 1.07%
2025-02-28 439 292.9 8.73% 1.92%
2024-11-30 426 307.7 7.38% 1%
2024-08-31 367 258.9 9.19% 1.61%
Earlier filings (7 more, back to 2022-11-30)
PeriodHoldingsEffectiveTop 10Largest
2024-05-31 349 212.9 11.38% 2.94%
2024-02-29 306 166 14.65% 3.18%
2023-11-30 243 171.1 12.62% 1.93%
2023-08-31 181 129 14.78% 2.1%
2023-05-31 159 109.1 18.07% 2.7%
2023-02-28 120 80.1 22.71% 3.21%
2022-11-30 62 48.6 28.89% 3.62%

One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.

Largest positions, as filed

as of 2026-05-31

The 15 largest of 689 positions in TAFI's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: TAFI.csv.gz.

#PositionWeightCumulative
1Colorado State Education Loan Program1.55%1.5%
2Triborough Bridge & Tunnel Authority0.98%2.5%
3City of Quincy MA0.69%3.2%
4Commonwealth of Puerto Rico0.64%3.9%
5University of California0.62%4.5%
6Illinois Finance Authority0.57%5.0%
7New York Transportation Development Corp0.56%5.6%
8Colorado State Education Loan Program0.54%6.1%
9New Jersey Economic Development Authority0.52%6.7%
10Southeast Alabama Gas Supply District/The0.51%7.2%
11City of Quincy MA0.46%7.6%
12Arizona Health Facilities Authority0.46%8.1%
13State of Ohio0.46%8.5%
14New Jersey Turnpike Authority0.44%9.0%
15Dallas Fort Worth International Airport0.44%9.4%

Returns the fund reported

2022-09 – 2026-05

Monthly total returns from Item B.5 of TAFI's own filings, 45 months on record. Not computed here and not from a price feed.

4.0%Last twelve months filed
13%Whole series, compounded
2.4%Best month
-1.4%Worst month

Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: TAFI.json · all funds.

Since the previous filing

2026-02-28 → 2026-05-31

615 positions became 686: 108 added (15.0% of the fund at the later date), 37 dropped (7.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 17.1%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of TAFI compared this way, as a feed: changes.xml · all funds: filings received.

Largest increases2026-02-282026-05-31Largest decreases2026-02-282026-05-31
Commonwealth of Puerto Rico0.10%0.64% Southeast Energy Authority A Cooperative District0.90%0.17%
Health & Educational Facilities Authority of the State o0.09%0.29% City of Jersey City NJ0.36%0.08%
Metropolitan Washington Airports Authority Aviation Revenue0.20%0.39% California Community Choice Financing Authority0.32%0.17%
University of California0.49%0.62% Colorado State Education Loan Program1.69%1.55%
Black Belt Energy Gas District0.10%0.21% Chicago O'Hare International Airport0.22%0.09%
Main Street Natural Gas Inc0.10%0.20% Triborough Bridge & Tunnel Authority1.06%0.98%

New: Long Beach Unified School District (0.40%), City of Hoboken NJ (0.33%), Colorado Health Facilities Authority (0.31%), Chicago Midway International Airport (0.28%), County of Miami-Dade FL Aviation Revenue (0.27%), California Community Choice Financing Authority (0.25%). Gone: Alliance Bernstein (1.62%), United States Treasury (0.65%), Green Lake Township Economic Development Corp (0.41%), Frisco Independent School District (0.41%), South Carolina Association of Governmental Organizations (0.39%), South Carolina Jobs-Economic Development Authority (0.31%).

Asset categories and pricing

as of 2026-05-31
Asset category (as filed)Share of investments
debt DBT98.98%
mortgage-backed ABS-MBS0.71%
ABS-O ABS-O0.29%
DIR DIR0.02%

0.0% of TAFI is carried at a quoted market price (fair-value level 1); 0.2% at level 3, priced from the filer's own inputs. Categories and levels are the filer's, from Form N-PORT; what a low level-1 share does and does not mean is in the measure's page.

Derivative exposure and counterparties

as of 2026-05-31

A position count cannot describe a fund that uses derivatives, because a swap is filed at its unrealised gain, not its exposure. These are the notionals the fund itself reported, against net assets of $1.26B. Notional of an interest-rate or currency swap is not equity exposure.

0%Stocks held directly
1.84%Swap notional (8)
0%Futures notional (0)
1.8%Sum, % of net assets
Swap counterpartyNotional% of net assets
LCH Ltd$19M1.54%
Intercontinental Exchange, Inc$4M0.29%

Financing leg as filed: the fund pays Secured Overnight Financing Rate + 0% on $5M of long swap notional . Issuers fill the spread field differently (some file the all-in rate), so compare within an issuer, not across.

1 option positions filed, 0 of them written. The book as filed:

TypeSideStrikeExpiryUnderlying
CallPurchased11.52035-12-01as filed, not named

Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).

Neighbours by effective holdings, debt funds

10

Every measured debt fund lined up by how many holdings it behaves like; these sit either side of TAFI (432.2). Same filings, same arithmetic. Position in this list says nothing about which fund is better.

FundReportsBehaves likeTop tenAs of
MMIT NYLIM MacKay Muni Intermediate ETF 855 412.4 8.41% 2026-07-31
CGMS Capital Group U.S. Multi-Sector Income ETF 1,493 422.4 6.76% 2026-06-30
BKAG BNY Mellon Core Bond ETF 5,130 427.3 7.38% 2026-07-31
IBDS iShares iBonds Dec 2027 Term Corporate ETF 660 427.5 7.11% 2026-07-31
TAXF American Century Diversified Municipal Bond ETF 755 429.2 7.49% 2026-05-31
VPLS Vanguard Core-Plus Bond ETF 2,903 446.1 * 9.8% 2026-06-30
HYMB State Street(R) SPDR Nuveen ICE High Yield Municipal Bond ETF 1,870 456.2 9.2% 2026-06-30
SPSB State Street(R) SPDR(R) Portfolio Short Term Corporate Bond ETF 1,601 463.5 6.92% 2026-06-30
EUSB iShares ESG Advanced Universal USD Bond ETF 4,233 479.3 6.99% 2026-05-31
MLN VanEck Long Muni ETF 654 485.5 5.4% 2026-07-31

Essays that examine TAFI

0

Mentions are detected across the full text of every article, so an appearance may be a passing comparison rather than the subject. Nothing here is a recommendation to buy or sell — see the disclaimer.