Municipal Securities on the SIE: GO vs Revenue Bonds, Tax Treatment and the MSRB Rules to Know

There is no single "munis" chapter on the SIE. Municipal securities sit inside debt instruments in Section 2, but the MSRB, municipal advisors and official statements appear in Section 1, muni settlement and confirmations in Section 3, and political contributions in Section 4. Studying them as one topic saves time, because the same handful of ideas answers questions in every section.

Where municipal securities appear in the SIE outline

FINRA's 2025 content outline touches municipal securities in these places:

The SEC's investor bulletin describes the issuers: states, their political subdivisions such as cities, counties and school districts, their agencies and authorities, and U.S. territories. They borrow to build schools, highways and water systems, to fund day-to-day needs, and to finance qualifying projects for private entities such as hospitals and colleges.

GO bonds vs revenue bonds: who pays you back

The MSRB's page on sources of repayment and the SEC's bulletin draw the main line:

The MSRB also defines three variations the outline's "special type bonds" points toward:

• Conduit bonds: a government issuer borrows on behalf of a private or 501(c)(3) borrower, such as a nonprofit hospital or housing project. The borrower's revenues pay the bonds, and the issuer usually isn't required to pay if the borrower defaults
• Double-barreled bonds: secured by a defined revenue source and by the full faith and credit of an issuer with taxing power, so they carry both pledges
• Moral obligation bonds: backed by a non-binding promise that any shortfall will be included in a budget request to the legislature, which isn't legally obligated to appropriate it

Some munis also carry credit enhancement, such as bond insurance or a bank letter of credit, as a secondary source of payment. The MSRB's advice to investors doubles as exam advice: for the details of a specific bond, read its official statement, which the SEC notes typically covers the security and sources of payment.

How municipal bond interest is taxed

The SEC's bulletin says the interest on municipal bonds is often, but not always, exempt from federal income tax. It may also be exempt from state and local taxes if you live in the state where the bond was issued, or if a U.S. territory issued it. The outline separately lists taxable municipal securities, and investor.gov notes that some munis may be subject to the federal alternative minimum tax. Because of the tax benefit, tax-exempt munis usually pay a lower interest rate than taxable bonds of similar maturity and credit quality.

That trade-off is why the exam asks about the investor's tax bracket. The higher the bracket, the more a tax-free coupon is worth.

Worked example (Passy's numbers). A muni yields 3.5% tax-free. The investor's marginal federal rate is 32%. The tax-equivalent yield is the tax-free yield divided by (1 − the tax rate): 3.5% ÷ 0.68 ≈ 5.15%. A taxable bond would have to yield more than about 5.15% to leave this investor better off. For an investor in a 12% bracket, the same muni is worth only 3.5% ÷ 0.88 ≈ 3.98% taxable, which is why munis are usually discussed for higher-bracket investors.

Yield questions reward a fixed routine more than speed, and yield calculations shown step by step are planned for full SIE prep. Until then, practice the formula in both directions: from tax-free to taxable, and from taxable to after-tax (taxable yield × (1 − rate)).

Competitive vs negotiated offerings

The MSRB's page on planning a bond issue describes the two common methods:

• Competitive offering: underwriters submit bids under the terms in the issuer's Notice of Sale, and the issuer generally awards all the bonds to the bidder that meets the notice and gives the lowest borrowing cost
• Negotiated offering: the issuer hires an underwriter to find investors, approves the terms, and decides how the bonds are distributed, including any retail order period and which orders get priority

MSRB Rule G-11, on the outline, governs primary offering practices, including the priority of customer orders.

The official statement, EMMA and Rule 15c2-12

The SEC's bulletin calls official statements the disclosure documents an issuer prepares for a bond offering: the terms of the bonds, financial and operating information about the issuer, and details such as the interest rate, maturity, call features, credit quality and the security for the bonds. Continuing disclosures follow after the sale, with annual financial information and notices of events such as rating changes, payment delinquencies or bankruptcy.

Three rules organize those documents:

• SEC Rule 15c2-12 applies to underwriters of primary offerings of $1,000,000 or more. Before bidding for, buying, offering or selling the bonds, the underwriter must obtain and review an official statement the issuer deems final, apart from permitted omissions such as the price and interest rate. It also must reasonably determine that the issuer has agreed in writing to send annual financial information and event notices to the MSRB
• MSRB Rule G-32 requires a dealer selling offered municipal securities to a customer to deliver the official statement by no later than settlement. For securities other than municipal fund securities, delivery is deemed satisfied once the underwriter has submitted the document to EMMA, and the dealer then tells the customer how to get it there
• EMMA, the MSRB's Electronic Municipal Market Access website, became the SEC-designated official repository for municipal disclosures in 2009. The SEC notes that neither it nor the MSRB reviews the documents before they're posted

One more fact the SEC states plainly: federal law prohibits the SEC from requiring a municipal issuer to file any application, document or report with it before the issuer sells its securities. That's why muni disclosure runs through underwriters and EMMA rather than SEC registration.

The MSRB rules on the SIE outline, in one line each

The SEC oversees the MSRB, which the SEC's bulletin describes as a self-regulatory organization. These are the MSRB rules on the outline that Passy checked in their current text:

The regulatory framework guide puts G-20 and G-37 next to FINRA's own gift and reporting rules. If you want to drill these numbers until they stick, 580 flashcards covering products, order types and limits are planned for launch.

Municipal fund securities in brief

MSRB Rule D-12 defines municipal fund securities, and the outline lists 529 plans (prepaid tuition and savings), local government investment pools and ABLE accounts. They're municipal securities that work like funds, which is why they sit apart from bonds on the outline. The Products and Their Risks guide maps what the outline expects you to know about them: owner vs beneficiary, restricted use of assets, tax advantages, and direct-sold vs adviser-sold plans.

A Passy practice question on municipal securities

This question was written by Passy for practice. It isn't a FINRA item.

A county issues bonds to finance a new wing for a nonprofit hospital. Under the bond documents, the hospital pays the principal and interest from its own revenues, and the county pledges nothing else. Which description fits?

A. General obligation bonds, so the county must raise property taxes if the hospital can't pay B. Conduit revenue bonds, and the county usually isn't required to pay bondholders if the hospital defaults C. Double-barreled bonds, because a county with taxing power issued them D. Moral obligation bonds, because the state legislature is legally bound to cover any shortfall

Keyed answer: B. The MSRB describes conduit bonds as issued by a government issuer for a private or 501(c)(3) borrower and paid from revenues the borrower pledges, and says the issuer normally isn't required to pay if the borrower doesn't. No tax pledge was made, which rules out A and C, since a double-barreled bond carries both a revenue pledge and the full faith and credit of an issuer with taxing power. D misstates a moral obligation: it's a non-binding covenant, and the legislature isn't legally obligated to appropriate the money.

Your next step with SIE munis

Write the GO vs revenue table from memory, then compute two tax-equivalent yields at different brackets. The free SIE practice questions mix muni-style debt questions with the other sections, and the trading and settlement guide shows how muni settlement lines up with stocks under T+1. When you're ready for longer sets, practice that mixes all four SIE sections is planned for full prep, which is how munis show up on the real exam.