AB High Income Municipal Portfolio
Actively managed U.S. bond fund
As of its 2026 Q2 report, AB High Income Municipal Portfolio held 882 positions with $2.79B in net assets. Its ten largest holdings made up 8.0% of the fund. The ABTHX share class costs 1.12% a year. Over the 12 months to May 2026, ABTHX returned 7.5%, with dividends reinvested. In 2026 Q3 it added 54 new positions and exited 20.
The investment objective of the Portfolio is to earn the highest level of current income, exempt from federal income tax, that is available consistent with what the Adviser considers to be an appropriate level of risk.
The fund invests principally in high-yielding municipal securities, including non-investment-grade and unrated securities, with at least 80% of assets in federally tax-exempt municipal bonds selected by the adviser based on credit quality, interest-rate sensitivity, and portfolio impact. The fund may invest without limit in lower-rated securities and seeks longer-maturity bonds to enhance income. Because the fund's returns depend on the adviser's assessment of individual securities' risk and return characteristics, performance will diverge from any benchmark based on those selection decisions.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
Tobacco Settlement Financing Corp 5.00% · due 2046-06-01 | 1.51% | $42.08M | — |
Public Finance Authority 5.75% · due 2041-07-25 | 0.89% | $24.69M | — |
Tobacco Settlement Financing Corp 5.00% · due 2047-06-01 | 0.87% | $24.17M | — |
ARC70 II TRUST 5.00% floating · due 2065-04-01 | 0.77% | $21.37M | — |
Puerto Rico Sales Tax Financing Corp Sales Tax Revenue 0.00% · due 2046-07-01 | 0.75% | $20.84M | — |
Buckeye Tobacco Settlement Financing Authority 5.00% · due 2055-06-01 | 0.69% | $19.14M | — |
Bristol Industrial Development Board 5.13% · due 2042-12-01 | 0.68% | $18.99M | — |
Puerto Rico Sales Tax Financing Corp Sales Tax Revenue 5.00% · due 2058-07-01 | 0.68% | $18.92M | — |
New York Transportation Development Corp 5.00% · due 2041-07-01 | 0.61% | $17.12M | — |
New Hampshire Business Finance Authority 4.38% · due 2036-09-20 | 0.59% | $16.36M | — |
The 200 largest of 882 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Bonds | 100.39% |
| Securitized | 0.22% |
| Cash & short-term | 0.10% |
| Stocks | 0.02% |
| Derivatives | -0.54% |
The outer band is exposure held short — written against the portfolio rather than part of it, which is why it sits outside the ring and why the two are never netted into one figure.
Derivatives are shown at market value, not notional exposure.
How it has done
ABTHX share class · total returns with dividends reinvested
Volatility over the last 12 months: 5.45%. Past returns are a record, not a forecast.
Jun 2026 and Jul 2026 have been filed since the trailing figures were struck, so they are not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
The 4 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 1.12% | +7.54% | +14.75% | +2.08% | -8.47% | |
| 1.87% | +6.74% | +12.36% | -1.66% | -8.64% | |
| 0.87% | +7.81% | +15.75% | +3.39% | -8.40% | |
| 0.87% | +7.81% | +15.65% | +3.32% | -8.40% |
These classes hold the same portfolio, so the 5.05pp spread over 5 years is the cost difference between them — roughly 1.01pp a year — not a difference in what they own.
Fees & fund details
AB High Income Municipal Portfolio is an actively managed U.S. bond fund.
- Asset class
- Bonds
- Region
- United States
- Management
- Actively managed
- Fund type
- Open-end fund
- Credit quality
- High yield
- Rate sensitivity
- Long duration
- Expense ratio, by class
- 0.87% – 1.87%· ABTHX 1.12%
- Portfolio turnover
- 24.00% a year · as of 2025 Q3
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
54 new· the largest 7
20 exited· the largest 6
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-05-31
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 82.0% |
| Floating rate | 10.0% |
| Zero-coupon or unclassified | 8.0% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 0.5% |
| 1-3y | 2.0% |
| 3-5y | 2.5% |
| 5-10y | 10.7% |
| 10y+ | 84.3% |
These three overlap — one holding can be in arrears and paying in kind at once — so they are shown separately and never summed.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
More of this fund’s sensitivity sits in credit spreads than in interest rates — a rate rally that comes with a credit selloff works against it.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Credit spreads | 52% |
| Interest rates | 48% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| High yield | +5.30 yr |
| Investment grade | +2.57 yr |
Share of duration at each point, shortest first. A positive figure loses value when spreads widen; a negative one offsets — a credit hedge.
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.22 yr | 3% |
| 5 yr | 1.60 yr | 22% |
| 10 yr | 3.21 yr | 44% |
| 30 yr | 2.21 yr | 30% |
| 3 mo | 0.02 yr | 0% |
| 1 yr | 0.33 yr | 4% |
| 5 yr | 1.15 yr | 15% |
| 10 yr | 3.76 yr | 48% |
| 30 yr | 2.61 yr | 33% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.01 | +0.00 | +0.02 | $1.1k | $4.2k |
| 1 yr | +0.22 | +0.07 | +0.25 | $20.4k | $70.5k |
| 5 yr | +1.60 | +0.47 | +0.68 | $131.6k | $189.5k |
| 10 yr | +3.21 | +1.36 | +2.40 | $379.5k | $669.4k |
| 30 yr | +2.21 | +0.66 | +1.95 | $185.2k | $543.3k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
A newer credit-spread reading (2026Q3) is on file. This page holds one quarter across every figure on it, so that one appears here next quarter.
Understand how this fund fits with the rest.
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