Section 3Function 3: Investment Products, Recommendations & Records
Municipal securities
80 min read
· Lesson 6 of 19
About This Lesson
Munis are the biggest single chapter in this module, and they earn it: a tax story that drives everything, two bond families with different credit logic, their own regulator, and a yield calculation the exam loves. If you keep one organizing idea, make it this: the federal tax exemption is the entire reason munis exist as an asset class, and nearly every question, suitability, TEY, OID versus market discount, comes back to it.
What you'll cover
the MSRB framework and the tested rule numbers (G-15, G-17, G-30, G-37, and the G-8/G-9 retention periods)
GO versus revenue bonds, the dozen special types, and the analysis metrics for each family
serial versus term structures, the official statement and legal opinion, underwriting, advance refunding, the full tax picture (OID, market discount, AMT, TEY), and suitability
This is the sixth chapter of the products module, and the longest; budget your time accordingly.
Munis are debt issued by states, cities, counties, and other governmental entities to pay for public projects, and they form the second-largest fixed income market after Treasuries. One feature defines the asset class: interest is generally exempt from federal income tax, and often from state and local tax too when you live in the issuing state.
That exemption is why munis appeal to high-bracket investors, and the tool for deciding whether a muni beats a taxable bond is the tax-equivalent yield (TEY), which gets its own calculator later in the chapter.
The regulatory frame: munis answer to the Municipal Securities Rulemaking Board (MSRB), which writes rules for broker-dealers and municipal advisors but has no authority over the issuers themselves; state and local governments are outside its reach. Enforcement belongs to FINRA (for broker-dealers) and the SEC.
MSRB Rules: The Tested Subset
The MSRB writes the rulebook, and the Series 7 tests a specific set of rule numbers by name. Memorize what each one governs; these cards are the flashcards:
Rule G-7
Information about associated persons (Form U4-equivalent records).
Rules G-8 / G-9
Books and records, and how long each must be kept (lifetime / 6 years / 4 years / 3 years).
Rule G-15
Customer confirmations — required disclosures including trade date, settlement, yield, capacity, and call features.
Rule G-17
Conduct of municipal securities and municipal advisory activities — the fair-dealing baseline.
Rule G-21
Advertising — must be approved by a principal and retained in records (4 years for advertising; abstracts of OS for 4 years per G-32).
Rule G-22
Control relationships — if the dealer controls or is controlled by the issuer, the relationship must be disclosed to the customer in writing.
Rule G-30
Fair pricing — prices and commissions to customers must be fair and reasonable, taking market conditions into account.
Rule G-37
Political contributions — a $250 de minimis per candidate (only if eligible to vote for that candidate). Larger contributions trigger a 2-year ban on negotiated underwriting business with that issuer.
Recordkeeping Periods (G-8 / G-9)
Lifetime
Articles of incorporation, partnership agreements, capital structure documents.
6 years
General ledger, customer accounts, customer complaints.
4 years
All other books and records, including advertising and OS abstracts.
3 years
Customer account agreements, terms of accounts.
MSRB vs. FINRA recordkeeping trap:
Customer complaints must be retained for 6 years under MSRB rules,
but only 4 years under FINRA rules. The exam tests this difference
directly.
Concept Check
A general obligation bond is issued by a city. Which of the following parties is responsible for enforcing MSRB rules applicable to the broker-dealers that underwrite and sell this bond?
The MSRB writes rules for municipal securities but has no enforcement authority. For broker-dealers, FINRA is responsible for examining firms and enforcing MSRB rules. The SEC enforces MSRB rules for municipal advisors. The MSRB does not directly regulate or examine issuers — state and local governments are exempt from direct MSRB jurisdiction. This regulatory structure is a recurring exam topic.
Concept Check
Under MSRB Rule G-37, which of the following activities by a municipal finance professional (MFP) would trigger a two-year ban on the firm engaging in negotiated municipal underwriting business with that issuer?
MSRB Rule G-37 (the "pay to play" rule) prohibits MFPs from making political contributions that could influence the awarding of municipal underwriting business. Contributions above the de minimis threshold ($250 per election per candidate for whom the MFP can vote) to an official who can influence bond issuance trigger a two-year prohibition on negotiated municipal securities business with that issuer. A $100 contribution to a candidate the MFP can vote for is within the de minimis exemption.
Concept Check
Of the following actions by a registered representative, which would constitute a violation of MSRB rules?
A $240 gift to an associated person at another broker-dealer for the purpose of obtaining business exceeds the practical reach of the MSRB Rule G-20 gift limit, which prohibits gifts in excess of $100 per person per year for business purposes. The fact that $240 is "just under $250" is a distractor — the relevant limit is $100, not $250 (which is the G-37 political contribution de minimis). Holding a joint account with a spouse is generally permitted, as is recommending diversification or making a recommendation after gathering customer information — the latter two are required by MSRB suitability rules.
Section 2 of 5~22 min · 6 concept checks
Bond Types, Cash Flow, and Analysis
General Obligation Bonds: Structure and Analysis
A GO bond is backed by the issuer's unlimited taxing power, so analyzing one means analyzing the tax base behind it. Four metrics carry the exam questions:
Net overall debt per capita: Total net debt of the issuer divided
by population. The lower the better — indicates the debt burden per resident
Net overall debt as % of assessed valuation: Compares total debt
to the property tax base. A common guideline is that debt above 10% of assessed
value is concerning
Overlapping debt: Multiple governmental entities (city, county,
school district) may all levy taxes on the same property. Overlapping debt captures
the total tax burden on property owners, not just the single issuer's debt
Tax collection rate: The percentage of taxes levied that is
actually collected. A rate below 90% is a warning sign
Limited tax vs. unlimited tax GO bonds: most GO bonds are unlimited tax, meaning the issuer can raise taxes as far as needed to service the debt. Where state law caps the rate, the result is a limited tax GO, a somewhat weaker credit because the tax-raising power has a ceiling.
Revenue Bonds: Structure and the Flow of Funds
Revenue bonds are secured by the revenues generated by the specific facility or
project being financed. Bondholders have no claim on the issuer's general tax
revenues — if the project fails to generate sufficient revenue, there is no
backstop. This makes the financial analysis of the project itself critical.
Key coverage ratios for revenue bonds:
Debt service coverage ratio (DSCR): Net revenues ÷ Annual
debt service. A DSCR of 1.0x means revenues barely cover debt payments. Most revenue
bond covenants require at least 1.25x to 1.5x coverage
Feasibility study: An independent analysis prepared before issuance
to project future revenues and costs
The Flow of Funds (Waterfall)
Revenue bond indentures specify the exact order in which revenues must be applied.
This is called the flow of funds or revenue waterfall:
1
Operations and maintenance fund
Day-to-day operating costs of the facility are paid first. Without this, the project cannot function.
2
Debt service fund
Principal and interest payments to bondholders. This is the core security for investors — it is funded before any surplus or reserve.
3
Debt service reserve fund
A reserve cushion funded to cover debt service if revenues fall short — typically equal to maximum annual debt service (MADS).
4
Renewal and replacement fund
Capital set aside for future major repairs and capital improvements. Keeps the facility operational over its useful life.
5
Surplus fund
Any remaining revenues after all prior claims. May be used for additional capital projects, rate reduction, or returned to the general fund.
Types of Municipal Bonds: The Full Map
Past plain GO and revenue bonds, the exam tests about a dozen sub-types, and every one of them is a recognition question: match the repayment source in the stem to the bond type. The color coding sorts them into families:
GO family
Revenue family
Hybrid / Special
Variable rate
Industrial Development Revenue (IDR)
Revenue
Issued by a municipality but the lease payments come from a corporate user. Backed by the corporation’s credit, not the municipality. Common for facilities the corporation will occupy.
Lease-Rental
Revenue
Municipality issues bonds and leases the financed facility to a state or local agency. Lease payments service the debt. Used when statutory debt limits prevent direct GO issuance.
Double-Barreled
Hybrid
Backed first by project revenue and second by the full faith and credit of the municipality. If revenue falls short, the GO backing kicks in. Strongest credit profile.
Special Tax
Hybrid
Backed by a specific excise tax — gasoline, cigarette, alcohol, sales, or business license. Applied to all who pay the tax, not a specific property. Not GO; not ad valorem.
Special Assessment
Hybrid
Backed by a charge levied on the specific properties benefiting from the improvement (sidewalks, sewers, street lights). Different from special tax: only the benefited owners pay.
New Housing Authority (NHA / PHA)
GO
Also called Section 8 bonds. The only municipal issue backed in full by the U.S. government — making them the safest munis available, AAA-rated.
Moral Obligation
Hybrid
Revenue bond issued by an agency where the state pledges only a non-binding promise to step in if revenue falls short. Legislature must vote to fund — not a legal obligation.
Certificate of Participation (COP)
Revenue
Investors receive a share of lease payments rather than a direct debt obligation. Issued without voter approval; payment subject to legislative appropriation each year.
Variable Rate Demand Obligation (VRDO)
Variable
Long-term bond with a coupon that resets at short intervals (typically weekly). Holder has a put option to sell back at par. Liquidity backed by a bank standby letter of credit.
Auction Rate Security (ARS)
Variable
Long-term bond with a coupon set by Dutch auction (typically every 7, 28, or 35 days). No put feature — if an auction fails, holders are stuck. The 2008 ARS market freeze was historic.
Special tax vs special assessment:
Special tax bonds are paid by everyone who buys gasoline / cigarettes / etc. —
the tax is broad-based. Special assessment bonds are paid by only the property
owners who directly benefit from the improvement. The exam frequently swaps these
in the answer choices.
Interactive: GO vs. Revenue Bond Sorter
Score: 0 / 8
📱 Tap a chip to select it, then tap a bucket to place it.
Sort each characteristic into the correct bond type
General obligation bond
Backed by taxing power
Revenue bond
Backed by project revenues
Municipal Bond Analysis: Depth Beyond the Basics
Net Total Debt and Overlapping Debt
Evaluating a GO issuer means computing debt several ways, and two distinctions keep reappearing on the exam:
Coterminous
Same boundaries, separate debt
Two or more taxing agencies share the exact same geographic boundaries (e.g., city and school district). Each issues debt independently against the same tax base.
Overlapping debt
Multiple issuers, same property
A property is taxed by more than one agency to service their respective debts (e.g., a homeowner pays toward city debt, county debt, and school district debt). Each agency’s debt overlaps the others on that property.
Net total debt formula:
Net total debt = All GO bonds + short-term debt + overlapping debt − self-supporting debt − sinking fund accumulations.
Memory aid: any category labeled net excludes self-supporting debt and sinking fund accumulations. Categories labeled gross include them.
Revenue Bond Analysis: Debt Coverage Ratio
For revenue bonds the credit question is simpler: does the project throw off enough cash? The debt service coverage ratio answers it:
Debt coverage ratio = Annual revenues available for debt service ÷ Annual debt service requirement A ratio of 2.0 means revenue covers debt service twice over. Higher is better; below 1.0 signals likely default. Bond covenants typically require minimums of 1.2 to 1.5.
Gross vs. Net Revenue Pledges
Gross Revenue Pledge
Debt service paid first, from gross revenue
Bondholders are paid before facility operating expenses. Stronger protection for bondholders; rarer in practice.
Net Revenue Pledge
Operating expenses paid first, debt service from net
More common structure. The facility must remain operational, so expenses come off the top before any cash reaches bondholders.
Pledge naming trick: The name of
the pledge tells you how debt service is paid. Gross pledge = paid from gross
revenues (debt service first). Net pledge = paid from net revenues (after
operating expenses).
Concept Check
A city issues revenue bonds to finance a new water treatment facility. The facility generates $4.5 million in annual net revenues. Annual debt service on the bonds is $3 million. What is the debt service coverage ratio, and is it generally considered adequate?
DSCR = Net revenues ÷ Annual debt service = $4.5M ÷ $3.0M = 1.5x. Most revenue bond indentures require a coverage ratio of at least 1.25x to 1.5x to provide a cushion above the minimum needed to pay bondholders. A 1.5x ratio is generally considered adequate and at the lower acceptable threshold. Anything below 1.0x means the project cannot cover its debt service from operations.
Concept Check
Which of the following correctly describes the first obligation paid from revenues in the standard revenue bond flow of funds?
In the standard revenue bond flow of funds, operations and maintenance costs are paid first — before debt service. The logic is that the facility must be able to operate to generate the revenues that pay the bondholders. The order is: (1) operations and maintenance, (2) debt service, (3) debt service reserve, (4) renewal and replacement, (5) surplus. This waterfall order is directly tested.
Concept Check
A municipality issues revenue bonds to finance a new sports stadium. The bonds are paid from stadium revenues. If stadium revenues are insufficient to cover debt service, which of the following is true?
Revenue bonds are backed solely by the revenues generated by the specific project or facility they finance. Bondholders have no claim on the issuing municipality's general tax revenues or taxing power. If the stadium generates insufficient revenue, bondholders bear the loss — this is why revenue bonds typically have higher yields than GO bonds. Some revenue bonds have a "moral obligation" pledge from the state, but this is not a legal obligation and is not guaranteed.
Concept Check
A municipality issues a special tax bond to fund infrastructure improvements. Of the following revenue sources, which would most likely back this special tax bond?
Special tax bonds are backed by specific excise taxes such as gasoline, cigarette, alcohol, sales, or business license taxes — broad-based taxes paid by everyone who buys the underlying good. Ad valorem property tax backs general obligation bonds, not special tax bonds. State or municipal income tax is unusual for muni bond backing and is not a defining feature of the special tax category. A property tax assessment on benefited owners describes a special assessment bond — a different category that is paid only by the property owners directly benefiting from the improvement.
Concept Check
Which of the following sources of payment would NOT typically back a municipal revenue bond?
Ad valorem property taxes are the principal funding source for general obligation bonds, not revenue bonds. Revenue bonds are paid from the income generated by a specific facility or activity — tolls, user fees, concessions, or special assessments. Tolls fund transportation revenue bonds; user fees fund utility revenue bonds; special assessments fund special assessment bonds, a subset of the revenue family. The defining distinction between GOs and revenues is the source of repayment: taxing power for GOs versus project income for revenues.
Concept Check
A homeowner pays property taxes that fund debt service for the city, the county, and the school district. The school district covers exactly the same geographic area as the city. With respect to the homeowner’s property, this situation reflects
The homeowner’s property is taxed by three separate agencies (city, county, school district), each issuing its own debt against the same property — the textbook definition of overlapping debt. Separately, the city and the school district share identical geographic boundaries while issuing debt independently — the definition of coterminous taxing authorities. The two concepts are distinct but often coexist on a single property. Coterminous describes the boundary relationship between agencies; overlapping describes the cumulative debt burden borne by a taxpayer subject to multiple agencies.
Section 3 of 5~15 min · 2 concept checks
Issuance, Underwriting, and Refunding
Serial vs. Term Bonds and the Official Statement
Serial Bonds
The standard structure for GO bonds: a slice of the issue matures every year. A 20-year serial issue might retire $500,000 a year from year 1 through year 20, which lowers credit risk steadily, gives the issuer a predictable debt-service schedule, and lets you pick the exact maturity you want.
Term Bonds
Here the whole issue matures on one date, a structure more common for revenue bonds. One large bullet payment means the issuer typically needs a sinking fund accumulating toward it, and some issues split the difference: serial maturities in the early years, a term balloon at the end.
The Official Statement (OS)
The OS is the disclosure document for a new muni offering, the muni world's answer to the prospectus: the issuer's financials, debt structure, legal opinions, everything material to evaluating the deal. A preliminary official statement (POS) circulates during the pre-sale period; the final OS arrives before settlement.
Inside it sits the legal opinion from bond counsel, a specialized law firm, confirming two things: (1) the bonds are validly issued and constitute legal obligations of the issuer, and (2) the interest is exempt from federal income tax. No clean legal opinion, no deal; the issue cannot be sold without one. The opinion appears on the face of the bond certificate or, for book-entry bonds, in the official statement.
Municipal Underwriting: Competitive vs. Negotiated, NIC vs. TIC
Competitive bidding
The issuer advertises the offering via a notice of sale. Underwriting syndicates submit sealed bids; the issuer awards to the bid that results in the lowest true interest cost. Required by law for most GO bonds.
Lower cost — market competition sets the rate
Negotiated sale
The issuer selects the underwriter in advance and negotiates the terms directly. More common for revenue bonds and complex structures that benefit from the underwriter's involvement in structuring the deal.
More flexibility — used for complex deals
NIC vs. TIC: The Two Bidding Methods
When multiple syndicates bid for a competitive muni offering, the issuer awards
to the bid with the lowest borrowing cost. Two methods are used to calculate cost:
Net interest cost (NIC): A simpler calculation that divides total
interest payments by dollar-years of debt outstanding. It does not account for the
time value of money — all cash flows are treated equally regardless of when
they occur
True interest cost (TIC): A more sophisticated calculation
equivalent to the internal rate of return — it does incorporate the time value
of money. TIC is considered the more accurate measure of actual borrowing cost
and is increasingly preferred over NIC
Advance Refunding, Pre-Refunded Bonds, and the Broker's Broker
Advance Refunding
An issuer stuck paying a high coupon on bonds that are not yet callable has a workaround: pre-refund them. Issue new lower-coupon bonds today, spend the proceeds on U.S. Treasury securities, and lock the Treasuries in an irrevocable escrow that pays the old bonds' debt service until the first call date, when the old bonds get called.
Effect on the old bonds
Now backed by Treasuries
The old bonds are defeased — escrowed Treasuries effectively replace the issuer’s credit. They are now considered AAA-rated regardless of the issuer’s credit, and trade like Treasuries until called.
Confirmation yield rule
Lower of YTM or YTC
For a pre-refunded bond trading at a premium with a known call date, the confirmation must show yield to call because YTC is lower than YTM — and MSRB Rule G-15 requires the lower yield be displayed.
The Broker's Broker
A broker's broker is a specialist firm that lets municipal dealers trade without showing their hand: neither the customer nor the counterparty is disclosed. Two situations drive the business:
Helping a syndicate dispose of unsold bonds after the new-issue period without revealing weakness in the offering.
Helping a customer firm liquidate a position in size without alerting the market that a large seller is present.
Anonymity is the defining feature. A broker's broker carries no inventory of its own and never deals with retail customers; the entire product is an information firewall between dealers. It is not a discount wholesaler, and it does not prepare underwriting bids for syndicates.
Concept Check
A municipal bond has been advance refunded and will be called at 102 four years from now. On a customer confirmation for a sale of this bond, MSRB rules require the yield to be displayed as
Under MSRB Rule G-15, customer confirmations must display the lower of yield to maturity or yield to call when both are calculable. For a pre-refunded bond trading near its call price with a defined call date, yield to call is almost always the lower number, so YTC governs. Showing only YTM would overstate the yield because the bond will almost certainly be called. Displaying YTC alone or the higher of the two would similarly mislead. The lower-yield rule protects customers from being shown the more attractive but less realistic yield figure.
Concept Check
A municipal dealer engages a broker’s broker to assist with a large bond sale on behalf of a customer. Which of the following best describes the broker’s broker’s function?
The defining feature of a broker’s broker is anonymity. The firm does not reveal which dealer it represents, and the eventual buyer’s identity is similarly protected from the selling dealer. Broker’s brokers do not maintain proprietary inventory and do not transact with retail customers — they exist exclusively to provide a privacy firewall between institutional dealers. They are not wholesalers, do not offer discounts off market, and do not prepare bids on behalf of underwriting syndicates. The anonymity is particularly valuable when a dealer wants to liquidate a large position without signaling weakness to the market.
Section 4 of 5~17 min · 4 concept checks
Tax Treatment and Tax-Equivalent Yield
Municipal Bond Tax Treatment
The tax treatment of muni interest is the primary driver of their suitability analysis.
The rules have several layers that generate exam questions.
Federal income tax
Generally exempt
Exception: Private activity bonds (PABs) may generate AMT income. Build America Bonds are fully taxable.
State and local tax
Exempt if in-state
Out-of-state munis generally taxable at state level. Some states exempt all munis regardless of origin.
Capital gains tax
Fully taxable
Tax exemption applies to interest income only, not capital appreciation on sale before maturity.
OID on munis
Tax-free for original buyers
Market discount (buying seasoned muni below par in secondary market) is taxable as ordinary income at sale or maturity.
Municipal Bond Tax Treatment: The Full Picture
Past the headline rule, muni interest is federally tax-free, sit four tax interactions the exam uses to separate prepared candidates from everyone else.
Original Issue Discount (OID) Munis
An OID muni is issued below par, and the discount accretes each year over the bond's life. The part that matters:
The annual accretion is treated as tax-exempt interest — it has the same federal tax treatment as the coupon interest.
At maturity, the bond pays par. Because the discount has already been accreted (and treated as tax-exempt interest), there is no taxable gain at maturity even though par exceeds the purchase price.
The accreted amount is added to cost basis annually — so by maturity, the bond’s adjusted basis equals par.
Market Discount Munis (Distinct from OID)
Buy a bond that was issued at par but now trades at a discount in the secondary market and you hold a market discount bond. That accreted discount is ordinary income at sale or maturity, not tax-free, and the exam loves the contrast with OID.
Capital Gains on Munis: Always Taxable
Heavily-tested trap: capital gains on munis are fully taxable at federal capital gains rates; the exemption covers interest, nothing else. Buy a muni at 95 in the secondary market, sell at 100, and the $5 difference is a capital gain at federal rates (or ordinary income to the extent of accreted market discount). Candidates keep assuming the exemption stretches to gains. It does not.
Alternative Minimum Tax (AMT) and Private Activity Bonds
A muni that sends more than 10% of its proceeds to private use is a private activity bond. Its interest stays out of regular federal taxable income but goes into alternative minimum taxable income, which makes these bonds worth less to the high-income investors most likely to pay AMT. The exam wants you to recognize that AMT bonds are not fully tax-exempt for everyone.
The Tax-Equivalent Yield Quick Reference
TEY = Muni yield ÷ (1 − tax rate) Example: A 4% muni yield to an investor in the 32% federal bracket has a TEY of 4% ÷ (1 − 0.32) = 5.88%. To match this aftertax return with a corporate bond, the corporate would need to yield 5.88%.
In-state double-exemption: a muni issued by an in-state entity is exempt from federal AND state income tax for that state's residents, which pushes the effective TEY even higher in high-tax states.
Worked Examples: Taxable Equivalent Yield (TEY)
Problem 1: An investor is in the 35% federal tax bracket and is choosing between a municipal bond yielding 4.2% and a corporate bond yielding 6.5%. Which offers the better after-tax return?
A muni yielding 4.41% is equivalent to a taxable bond yielding 7% for this investor.
3
Any muni yielding above 4.41% would provide a higher after-tax return than the 7% taxable bond.
Equivalent muni yield = 4.41%. Quick reference: at 37%, multiply taxable yield by 0.63 to find the equivalent muni yield needed. At 32%: multiply by 0.68.
TEY reference — a 4% municipal bond at various brackets:
An investor in the 35% federal tax bracket is comparing a municipal bond yielding 3.9% to a corporate bond of similar credit quality and maturity. What is the tax-equivalent yield of the municipal bond, and which bond is more attractive?
TEY = Muni yield ÷ (1 − tax rate) = 3.9% ÷ (1 − 0.35) = 3.9% ÷ 0.65 = 6.0%. The 3.9% muni delivers the same after-tax return as a 6.0% taxable bond for this investor. If the corporate bond yields less than 6.0%, the muni is more attractive on an after-tax basis. The TEY formula is the most frequently tested muni calculation — memorize it cold.
Concept Check
A customer purchases a seasoned municipal bond in the secondary market at a price below its original issue price. The bond is held to maturity. How is the discount treated for tax purposes?
Market discount — buying a seasoned muni below par in the secondary market — is taxable as ordinary income when the bond is sold or matures, even though the bond's interest payments are tax-exempt. This is different from original issue discount (OID) on a newly issued tax-exempt muni, where the accretion is also tax-exempt. The distinction between OID (tax-free) and market discount (taxable) is a classic exam trap.
Concept Check
An investor in the 24% federal tax bracket is considering a municipal bond yielding 3.8%. What is the taxable equivalent yield?
TEY = Municipal yield / (1 - tax rate) = 3.8% / (1 - 0.24) = 3.8% / 0.76 = 5.00%. This means a taxable bond must yield 5.00% to equal the after-tax return of this 3.8% muni for an investor in the 24% bracket. The higher the tax bracket, the more attractive munis become. At 37%, TEY = 3.8% / 0.63 = 6.03%.
Concept Check
An investor purchases 10 municipal original issue discount bonds at 92 ($9,200) and holds them to maturity, when each is redeemed at par ($1,000). Assuming no premium and no other adjustments, what amount will the investor be required to report as taxable to the federal government on the gain at maturity?
The original issue discount on a municipal bond is accreted annually as tax-exempt interest. By maturity the accreted amount has been added to the investor’s cost basis each year, raising the adjusted basis to par. The difference between the $920 purchase price and $1,000 par value has therefore already been recognized over the life of the bond as tax-exempt interest, leaving no taxable gain at maturity. This treatment is unique to OID munis — OID corporate bonds accrete as ordinary income, and a muni purchased at a market discount in the secondary market accretes as ordinary income rather than tax-free.
Section 5 of 5~10 min · 1 concept check
Suitability
Who Should Own Municipal Bonds?
The tax exemption only pays if you actually owe meaningful taxes, which sorts the suitable buyers cleanly:
High-bracket investors (32%, 35%, 37%): the exemption works hardest here. A 3.5% muni yield equals a 5.56% taxable yield for an investor in the 37% bracket (TEY = 3.5% ÷ 0.63).
In-state residents: living in the issuing state typically adds the state exemption on top of the federal one, widening the after-tax edge.
Generally unsuitable for: low-bracket investors (the exemption is worth little), tax-deferred accounts (IRAs and 401(k)s shelter income already, so the exemption is wasted), and non-U.S. persons who owe no U.S. income tax.
Muni Bond Suitability and MSRB Rule G-37
Muni Suitability Rule
The previous block gave you the buyer profile; here is how the exam enforces it. The federal exemption is the whole investment case for munis, so they are only suitable for investors in higher tax brackets; a low-bracket investor nets more from a higher-yielding corporate bond.
Exam rule: a question that describes a low-tax-bracket investor and lists a muni among the choices has already told you the answer: the muni is never it. The exam treats this as a bright line.
Within the high-bracket population, three more filters apply:
Retirement accounts: Munis are unsuitable for IRAs, 401(k)s, and other tax-deferred accounts — the federal exemption is wasted in an already-tax-sheltered vehicle.
AMT exposure: Investors near AMT thresholds should generally avoid private-activity bonds.
State residence: In-state issues offer double exemption (federal + state) for residents — a meaningful advantage in high-tax states.
MSRB Rule G-37 Political Contributions
You met G-37 in the rules grid; here is the mechanism. A municipal financial professional (MFP) who gives more than $250 per election to an issuer official triggers a two-year ban on the dealer's negotiated underwriting business with that issuer, and the $250 de minimis only protects contributions to candidates the MFP can actually vote for. Give to a candidate you cannot vote for and the de minimis offers no protection at all.
Why Rule G-37 exists: before its 1994 adoption, "pay-to-play" was routine: dealers won negotiated underwriting by routing campaign money to issuer officials. The 2-year ban cuts the wire between political spending and business awards.
Four Muni Traps That Appear Every Administration
Trap 1: munis in IRAs are unsuitable. The exemption is redundant inside a tax-deferred account; the investor gives up yield (munis pay less than taxable bonds) and gains nothing for it.
Trap 2: market discount is taxable, OID is not. Buy a muni below par in the secondary market and the discount accretes as ordinary income. Buy a new-issue muni at OID and the accretion is tax-free. Same economics, opposite tax treatment.
Trap 3: capital gains on munis are taxable. The exemption covers interest income only. Sell a muni at a profit and the gain is taxed.
Trap 4: the MSRB writes the rules but does not enforce them. FINRA enforces MSRB rules for broker-dealers; the SEC enforces them for municipal advisors; the MSRB itself has no enforcement arm. The three-way split is heavily tested.
Concept Check
A customer asks her registered representative to recommend a tax-exempt municipal bond for her traditional IRA. The rep should:
Municipal bond interest is already tax-deferred inside a traditional IRA — the account's tax shelter makes the muni's tax exemption redundant. Because munis offer lower yields than taxable bonds of similar quality (investors accept less yield in exchange for the tax benefit), placing a muni in an IRA gives up yield without gaining any additional tax advantage. A higher-yielding taxable bond would likely produce better results inside the tax-deferred account.
SummaryExam-day review · 2 essentials blocks
Chapter Summary — Exam Essentials
Ch 13 Exam Essentials — Municipal Securities
GO vs. revenue: GO bonds backed by unlimited taxing power, require voter approval. Revenue bonds backed by project revenues only, no voter approval, no claim on general tax base. Revenue bonds have higher yields.
TEY formula: Muni yield ÷ (1 − tax rate). At 37% bracket: 4% muni = 6.35% TEY. Munis are generally suitable for investors in the 32% bracket and above.
MSRB Rule G-37 (pay-to-play): Contributions above $250 de minimis to officials who can influence bond issuance trigger a 2-year ban on negotiated muni underwriting with that issuer for the contributing firm.
Legal opinion: Prepared by bond counsel; states the bonds are legally issued and interest is tax-exempt. Unqualified opinion = no reservations. A bond without a legal opinion is sold "ex-legal."
NIC vs. TIC: Net interest cost (NIC) does not account for time value of money. True interest cost (TIC) does — it is the more accurate measure. Most issuers use TIC to evaluate bids.
Municipal Bond Exam Traps — Consolidated
The Series 7 returns to a recurring set of distinctions in this area. If a
question feels familiar, it is probably testing one of these:
1. Special tax vs. special assessment. Special tax bonds are
backed by broad excise taxes (gasoline, cigarette, sales) paid by everyone who
makes the underlying purchase. Special assessment bonds are paid by the specific
property owners benefiting from the improvement.
2. NHA / PHA bonds are the only U.S.-backed munis. Section 8
housing bonds carry full faith and credit of the U.S. government and are AAA-rated
regardless of the issuing housing authority’s own credit.
3. Coterminous vs. overlapping debt. Coterminous = same boundaries,
separate debt issuance (city + school district). Overlapping debt = a property is
taxed by multiple agencies for their respective debts.
4. Net debt excludes self-supporting and sinking fund. Memory
shortcut: any debt category labeled "net" subtracts self-supporting debt and
sinking fund accumulations. "Gross" includes them.
5. Pre-refunded bond yield = lower of YTM or YTC. Once defeased
into Treasury escrow, the bond is AAA-rated and trades at premium. MSRB Rule G-15
requires the lower of the two yields on the confirmation — typically YTC.
6. OID accretion is tax-free; market discount accretion is ordinary
income. The original-issue discount on a muni accretes annually as
tax-exempt interest. A bond bought at a discount in the secondary market accretes
as ordinary income for federal tax purposes.
7. Capital gains on munis are taxable. Only the interest is
federally tax-exempt. Gains are taxed at federal capital-gain rates regardless of
the bond’s tax-exempt interest status.
8. AMT on private-activity bonds. If a muni’s proceeds direct
more than 10% to private use, the interest is includable in alternative minimum
taxable income. AMT-paying investors should generally avoid these.
9. Munis are unsuitable for low-tax-bracket investors and for retirement
accounts. The exam treats this as bright-line. A low-bracket investor or
an IRA holder is never recommended a muni.
10. MSRB customer complaints = 6 years; FINRA = 4 years. The
recordkeeping period difference is directly tested. MSRB also requires lifetime
retention of organizational documents.
11. Rule G-37: $250 de minimis, 2-year ban for excess. A muni
financial professional can contribute up to $250 per election only to candidates
they’re eligible to vote for. Larger contributions ban the dealer from negotiated
underwriting with that issuer for two years.
12. Broker’s broker = anonymity service. Provides an information
firewall between dealers. Does not maintain inventory, does not sell to retail,
and does not prepare bids.