BSSX vs IBMP

BSSXCInvesco BulletShares 2033 Municipal Bond ETF

IBMPAiShares iBonds Dec 2027 Term Muni Bond ETF

In short

BSSX One rung of a municipal bond ladder in a single ticker. BSSX tracks an index of U.S. munis whose effective maturities all land in 2033, spreading roughly 1,600 of them across one fund.

IBMP A single rung of a muni ladder in one ticker: investment-grade bonds that all mature in 2027, tax-exempt income paid monthly along the way, and a defined end date instead of a fund that rolls on forever.

Stated mandate

BSSX The fund is based on the Invesco BulletShares® USD Municipal Bond 2033 Index and invests at least 80% of its assets in municipal bonds included in that index. The index covers U.S. dollar-denominated municipal securities with effective maturities in 2033.

IBMP The fund seeks to track an index of investment-grade municipal bonds maturing in 2027. It is designed to provide tax-exempt income, support bond-ladder construction, and manage interest-rate risk through a defined maturity.

Why people hold it

• BSSX Roughly 1,600 municipal bonds in one 2033 rung, spreading issuer risk far wider than a hand-built ladder of a few bonds.
• Defined maturity is baked in: the index holds only munis with effective maturities in 2033, so the portfolio's remaining life shortens as that year approaches.
• Income arrives monthly, and the mandate is tight: at least 80% of assets in municipal bonds from its named 2033 index.

• IBMP Built to act like a bond, not a bond fund: the portfolio matures in 2027 and the whole design points at that date, which is what makes ladder-building possible with one trade.ishares.com
• 0.10% a year, right at the typical target-maturity bond fund, and it tracks an AMT-free index, so the tax-exempt income isn't pulled back in by the alternative minimum tax.
• Roughly 1,800 municipal bonds, so no single issuer carries the fund. That spread is hard to replicate buying individual munis one CUSIP at a time.
• Income lands monthly, and this 2027 rung has been running since 2019, so it isn't a fresh launch built for the moment.

Worth knowing

• BSSX At 0.18% a year it sits above the target-maturity norm. Treasury and corporate rungs such as IBTJ (0.07%) and BSCT (0.10%) charge less for the same ladder idea.
• A smaller fund that trades thinly, so bid-ask spreads can run wide. Limit orders are the standard defense.
• Launched in 2023, so it carries a short track record and a long stretch of rate and credit weather before its bonds come due.

• IBMP The 0.10% fee is the category median, not a discount. Treasury and corporate rungs like IBTJ (0.07%) and VBCB (0.08%) cost less, though neither pays tax-exempt muni income.
• The tax exemption is the entire pitch, and it does no work inside an IRA or 401(k), where the income is already sheltered.
• Trading is moderate rather than heavy, so order size and timing matter more here than in the most heavily traded bond ETFs.

Full BSSX profile⁠

Full IBMP profile⁠