HYMB vs IROC

HYMBAState Street SPDR Nuveen ICE High Yield Municipal Bond ETF

IROCBInvesco Rochester High Yield Municipal ETF

In short

HYMB Most muni index funds stop at investment grade. HYMB keeps going: its benchmark reaches from A-rated paper down through unrated deals, spreading roughly 1,900 tax-exempt bonds across that credit line. Income lands monthly.

IROC Invesco's Rochester muni desk, ETF-wrapped: active high-yield munis at 0.39% net of a waiver through December 31, 2026, with room to add leverage through tender option bonds and duration normally kept under 7.5 years.

Stated mandate

HYMB The fund seeks to track, before fees and expenses, the price and yield performance of the ICE US Select High Yield Crossover Municipal Index, which covers lower-rated and unrated tax-exempt municipal debt issued in the United States.

IROC The Fund is actively managed and seeks its objective by investing at least 80% of assets in high-yield municipal securities and economically similar derivatives or instruments. Income from the municipal securities is intended to be exempt from federal income taxes.

Why people hold it

• HYMB The crossover mandate is the whole point: the index covers lower-rated (A3/A+ or lower) and unrated tax-exempt debt, not another top-grade general-obligation ladder.ssga.com
• About 1,900 bonds dilute any single issuer's trouble, and State Street has run the fund since 2011, through more than one muni credit scare.
• One of the more actively traded funds in the muni ETF aisle, which counts in a market where the underlying bonds themselves can sit still for weeks. Pays monthly.

• IROC Run by Invesco's long-standing Rochester municipal desk, with at least 80% of assets in high-yield munis whose income is intended to be exempt from federal income taxes.invesco.com
• Tools most index muni funds don't carry: inverse floaters (tender option bonds) for leverage, plus 144A and restricted paper, so the manager can hunt yield off-index.sec.gov
• Pays monthly, spread across roughly 200 bonds, with weighted average portfolio duration normally under 7.5 years.invesco.com

Worth knowing

• HYMB 0.35% a year is the toll for assembling illiquid paper. Broad, plain-vanilla muni index funds such as VTEB and SCMB charge 0.03%.
• Lower-rated and unrated munis carry default and downgrade risk that top-rated general-obligation bonds don't, and prices can move sharply when muni buyers step back.
• The benchmark has been swapped before (Bloomberg to ICE in 2025), so older track records reflect a different index than the one the fund follows now.ssga.com

• IROC Leverage cuts both ways: the prospectus notes inverse floaters typically swing more than similar-maturity bonds and can lose some or all of their principal.sec.gov
• Fee sits near the category median: 0.39% net of a waiver through December 31, 2026, then 0.40% gross. HYD (0.32%) and FMUB (0.30%) charge less, with no waiver attached.
• One of the smaller, thinner-traded funds in a category stocked with giants, so bid-ask spreads can matter as much as the fee.

Full HYMB profile⁠

Full IROC profile⁠