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 2026-05-31Computed 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 2026-05-31TAFI'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
15Between 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.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 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)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 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 2026-05-31The 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.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | Colorado State Education Loan Program | 1.55% | 1.5% |
| 2 | Triborough Bridge & Tunnel Authority | 0.98% | 2.5% |
| 3 | City of Quincy MA | 0.69% | 3.2% |
| 4 | Commonwealth of Puerto Rico | 0.64% | 3.9% |
| 5 | University of California | 0.62% | 4.5% |
| 6 | Illinois Finance Authority | 0.57% | 5.0% |
| 7 | New York Transportation Development Corp | 0.56% | 5.6% |
| 8 | Colorado State Education Loan Program | 0.54% | 6.1% |
| 9 | New Jersey Economic Development Authority | 0.52% | 6.7% |
| 10 | Southeast Alabama Gas Supply District/The | 0.51% | 7.2% |
| 11 | City of Quincy MA | 0.46% | 7.6% |
| 12 | Arizona Health Facilities Authority | 0.46% | 8.1% |
| 13 | State of Ohio | 0.46% | 8.5% |
| 14 | New Jersey Turnpike Authority | 0.44% | 9.0% |
| 15 | Dallas Fort Worth International Airport | 0.44% | 9.4% |
Returns the fund reported
2022-09 – 2026-05Monthly total returns from Item B.5 of TAFI's own filings, 45 months on record. Not computed here and not from a price feed.
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 → 2026-05-31615 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 increases | 2026-02-28 | 2026-05-31 | Largest decreases | 2026-02-28 | 2026-05-31 |
|---|---|---|---|---|---|
| Commonwealth of Puerto Rico | 0.10% | 0.64% | Southeast Energy Authority A Cooperative District | 0.90% | 0.17% |
| Health & Educational Facilities Authority of the State o | 0.09% | 0.29% | City of Jersey City NJ | 0.36% | 0.08% |
| Metropolitan Washington Airports Authority Aviation Revenue | 0.20% | 0.39% | California Community Choice Financing Authority | 0.32% | 0.17% |
| University of California | 0.49% | 0.62% | Colorado State Education Loan Program | 1.69% | 1.55% |
| Black Belt Energy Gas District | 0.10% | 0.21% | Chicago O'Hare International Airport | 0.22% | 0.09% |
| Main Street Natural Gas Inc | 0.10% | 0.20% | Triborough Bridge & Tunnel Authority | 1.06% | 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 DBT | 98.98% |
| mortgage-backed ABS-MBS | 0.71% |
| ABS-O ABS-O | 0.29% |
| DIR DIR | 0.02% |
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 2026-05-31A 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.
| Swap counterparty | Notional | % of net assets |
|---|---|---|
| LCH Ltd | $19M | 1.54% |
| Intercontinental Exchange, Inc | $4M | 0.29% |
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:
| Type | Side | Strike | Expiry | Underlying |
|---|---|---|---|---|
| Call | Purchased | 11.5 | 2035-12-01 | as filed, not named |
Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).
Neighbours by effective holdings, debt funds
10Every 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.
| Fund | Reports | Behaves like | Top ten | As 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
0Mentions 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.