THE SHORT ANSWER

Because an underwriter buys the issuer's bonds for resale, the MSRB's interpretive notice on its fair dealing rule requires it, in negotiated deals, to disclose that its role is arm's-length and that it has no federal fiduciary duty to the issuer. An independent municipal advisor instead advises the issuer and owes its municipal entity clients a statutory fiduciary duty.

Relying on the underwriter for investment advice means relying on a member of the financing team that federal securities law places across the table: an underwriter buys the issuer's bonds for resale, while an independent municipal advisor advises the issuer and owes its municipal entity clients a fiduciary duty.

This page takes that difference apart in three steps: the roles the law assigns, the conflicts that follow when bond proceeds are invested, and the exemption that governs what an underwriter or broker may still tell an issuer with independent advice in place.

It narrows one question from the broader guide to municipal advisors, which covers the statutory definition, registration and conduct rules in full.

Arm's-length vs fiduciary: who does the underwriter work for?

They work for different parties: the MSRB glossary defines an underwriter as a municipal securities dealer that purchases a new issue of municipal securities from the issuer for resale in a primary offering, whether through negotiation or by competitive bid.

A municipal advisor, in contrast, is defined by advice: the Exchange Act defines one as a person, other than a municipal entity or its employee, who advises a municipal entity or an obligated person on municipal financial products or the issuance of municipal securities, or who solicits a municipal entity (15 U.S.C. 78o-4(e)(4)(A), added by Dodd-Frank Act Section 975 (Pub. L. 111-203, July 21, 2010)).

The definition expressly carves the underwriter out: a broker, dealer or municipal securities dealer serving as an underwriter of a particular issuance is excluded to the extent it engages in activities within the scope of an underwriting, alongside similar exclusions for registered investment advisers, commodity trading advisers, attorneys and engineers (17 CFR 240.15Ba1-1(d)(2)(i) through (v)).

The investment adviser exclusion is narrower than it looks: the rule says investment advice does not include advice on whether and how to issue municipal securities or on structure, timing and terms, while an adviser giving investment advice on bond proceeds may fall within that exclusion when it acts in that capacity.

The SEC has described the underwriter role as time-limited: it generally begins when the issuer engages the underwriter for a particular issuance and ends at the end of the underwriting period for that issuance (Release No. 34-70462, footnote 296), and advice outside the scope of the underwriting is not covered by the exclusion.

The duty on the advisory side is statutory: the Exchange Act deems a municipal advisor and its associated persons to have a fiduciary duty to any municipal entity for which it acts as a municipal advisor (15 U.S.C. 78o-4(c)(1)).

That fiduciary duty runs to municipal entity clients, while an obligated person client, such as a nonprofit hospital borrower, is owed a duty of care under the MSRB's standards of conduct for municipal advisors, and whether a particular borrower is a municipal entity or an obligated person is a determination for bond counsel.

The MSRB's interpretive notice concerning the application of its fair dealing rule to underwriters then makes the difference a disclosure in negotiated offerings: an underwriter must disclose at the earliest stages, for example in a response to a request for proposals, that its role is arm's-length, that unlike a municipal advisor it has no federal fiduciary duty to the issuer, and that the issuer may engage a municipal advisor.

The notice continues that the underwriter is therefore not required by federal law to act in the issuer's best interests, applies to negotiated underwritings unless competitive deals are specifically mentioned, and is shown on the MSRB's page with a March 31, 2021 date, superseding a 2012 version.

The difference is where loyalty runs, not whether fairness applies: the MSRB's fair dealing rule requires each broker, dealer, municipal securities dealer and municipal advisor to deal fairly with all persons and to avoid deceptive, dishonest or unfair practices.

Party on a bond issueWhat it doesFederal duty to the issuer
UnderwriterBuys the new issue from the issuer for resale, by negotiation or competitive bidNo federal fiduciary duty; disclosure of that is required in negotiated offerings
Independent municipal advisorAdvises a municipal entity or obligated person on municipal financial products and on the issuanceDeemed fiduciary duty for municipal entity clients, 15 U.S.C. 78o-4(c)(1)
Guaranteed investment contract providerSells the guaranteed investment contractGenerally not a municipal advisor unless it advises the issuer about the purchase (Release No. 34-70462)

Where do the conflicts come from?

The conflicts follow from one institution holding several roles on the same financing: the firm that underwrites the bonds may also stand on the provider side of the reinvestment.

Treasury Regulation §1.148-1(b) defines sale proceeds to include amounts used to pay underwriters' discount or compensation, and the MSRB glossary lists the underwriter's discount and financial advisory fees among costs of issuance.

The enforcement record shows what that structure can produce: on May 4, 2011, the SEC charged UBS Financial Services with rigging at least 100 municipal bond reinvestment transactions in 36 states, in conduct the SEC dated to 2000 through 2004.

The SEC said UBS won bids as a provider of reinvestment products and also rigged bids for other providers while acting as a bidding agent on behalf of municipalities, and routed undisclosed payments to bidding agents through interest rate swaps.

UBS agreed to pay $47.2 million to the SEC and $113 million in parallel cases, $160 million in total, and the allegations were settled without admission.

The Treasury bidding rules respond directly to that structure: under the safe harbor in Treasury Regulation §1.148-5(d)(6)(iii), the issuer must receive at least three bids from solicited providers with no material financial interest in the issue, and at least one of those bids must come from a reasonably competitive provider.

The rule names the participants whose interest is presumed: a lead underwriter in a negotiated underwriting transaction is deemed to have a material financial interest in the issue until 15 days after the issue date, and any entity acting as financial advisor on the investment purchase when the specifications go out has one as well, as do related parties of such providers.

The regulation prescribes no cure when the count falls short: fewer than three qualifying bids means only that the safe harbor's conditions are not met, which the guide to fewer than three bids covers.

MSRB rules govern the advisory side of the same structure: a dealer that has a financial advisory relationship with respect to an issuance may not acquire any portion of that issue as principal, alone or in a syndicate, or act as placement agent for it (MSRB restrictions on financial advisory relationships, paragraph (d)(i)).

The same restrictions extend to affiliates, keep a dealer financial advisor from serving as remarketing agent on that issue, with a successor appointment possible only after a one-year gap, and carry a narrow exception for placing an entire issue with a governmental entity (paragraphs (d)(ii), (d)(iii) and (e)).

These restrictions are in flux at the MSRB: as of April 23, 2026, the MSRB had a pending request for comment, corrected May 6, 2026, on draft amendments retiring the financial advisor terminology (Notice 2026-03), so the framing of these restrictions may change.

On the advisor side, the MSRB's standards of conduct require a duty of loyalty: the advisor must deal honestly and with utmost good faith, act in the municipal entity client's best interests without regard to the financial or other interests of the advisor, and decline the engagement if its conflicts cannot be managed (conduct rule, Supplementary Material .02).

The same rule prohibits excessive compensation, materially inaccurate invoices, false or misleading statements about the advisor's capacity in RFP responses, fee-splitting with underwriters, undisclosed fee-splitting with providers of investments or services, most payments to obtain engagements, and principal transactions on the same or a directly related issue or product for municipal entity clients (paragraphs (e)(i)(A) through (E) and (e)(ii)).

Two limits keep that list precise: the ban on fee-splitting with providers of investments or services covers undisclosed arrangements, while the ban on fee-splitting with underwriters is unconditional.

A provision in the rule's supplementary materials (SM .14) also excepts specified fixed income securities.

The full conduct standards are on the page covering the MSRB's standards of conduct for municipal advisors.

One boundary remains on the provider side: the SEC said a guaranteed investment contract provider is generally not a municipal advisor as long as it does not advise the municipal entity or obligated person about the purchase (Release No. 34-70462).

What does the IRMA exemption do for an issuer working with its underwriter?

The exemption lets a person give advice without registering as a municipal advisor when the issuer also has independent advice on the same transaction: an independent registered municipal advisor is advising the client on the same aspects of the product or issue, the client represents in writing that it is represented by and will rely on that advisor's advice, and the person makes the required written disclosures (17 CFR 240.15Ba1-1(d)(3)(vi)).

Independence has a definition: the independent advisor must be a registered municipal advisor that is not, and within at least the past two years was not, associated with the person relying on the exemption.

The person relying on the exemption must also have a reasonable basis for relying on the client's representation, and for a municipal entity client it must disclose in writing that it is not a municipal advisor and is not subject to the Exchange Act's fiduciary duty, copying the independent advisor on that disclosure at a time and in a manner that let the client assess the person's incentives and conflicts.

Scope is the practical limit: the independent advisor must advise on the same aspects of the transaction, a general representation letter does not cover everything automatically, and the SEC's staff FAQ 3.2 discusses advisors who serve in a general capacity.

GFOA reads the same rule from the issuer's side: brokers may be considered municipal advisors when they advise governments on investments of bond proceeds, and governments may take broker-dealer advice through an RFP process or when they have retained an independent registered municipal advisor.

GFOA adds that issuers may retain a registered investment adviser for more than de minimis investment advice.

The exemption exists because the default is its opposite: without that written reliance on an independent advisor, a broker's advice on bond-proceeds investments can itself be municipal advisory activity.

The representation letter's mechanics are on the independent registered municipal advisor exemption page.

How does mGIC's independent structure answer these conflicts?

mGIC is an independent, SEC-registered municipal advisor founded in 2002 in Scottsdale, Arizona, and its structure addresses the provider-side conflict described above: the firm sells no proprietary investment product and does not act as principal in the investments it evaluates.

Its three services sit on the issuer's side of the reinvestment: bond-proceeds reinvestment advisory, Bidding Agent services that competitively bid the investment, and documentation and settlement that ends with certifications delivered to bond counsel and a compliance file.

It evaluates and bids guaranteed investment contracts, full-flex repurchase agreements and structured portfolios of U.S. Treasury securities, none of which it sells, with priorities in the order of safety first, then liquidity, then yield.

Its fee is paid by the winning provider rather than the issuer, is set at or below the safe-harbor maximum in the Treasury arbitrage regulations, and is disclosed, a structure covered in the guide to how Bidding Agents are paid.

Robert H. Rasmussen has been its Managing Director since 2002 with primary responsibility for the Bidding Agent and reinvestment advisory work, and the firm's record spans more than $60 billion in bond proceeds invested and swap notional executed across more than 1,000 transactions for issuers in more than 40 states.

The about mGIC page covers the firm and its representative transactions.

To see how an independent structure would run on a live fund or escrow, mGIC offers a free, no-obligation reinvestment review or conversation, and you can work with an SEC-registered advisor to start one.

Final conclusions about a specific issue, including which duties apply to which member of its financing team, belong to bond counsel and tax counsel.

Frequently asked questions

Does an underwriter have a fiduciary duty to a bond issuer?

Not under the federal securities laws. In negotiated offerings the MSRB's interpretive notice on its fair dealing rule requires the underwriter to disclose that its role is arm's-length, that unlike a municipal advisor it has no federal fiduciary duty to the issuer, and that the issuer may engage a municipal advisor. The same rule still requires the underwriter to deal fairly with all persons.

Does the IRMA exemption require three bids?

No, those are different rules. The independent registered municipal advisor exemption turns on the written reliance representation, the written disclosures and the advisor's independence, under 17 CFR 240.15Ba1-1(d)(3)(vi). The three-bid requirement is a condition of the Treasury bidding safe harbor at 1.148-5(d)(6)(iii), which counts only bids from providers with no material financial interest in the issue.

Is a guaranteed investment contract provider a municipal advisor?

Generally not. The SEC said a provider of a guaranteed investment contract is generally not a municipal advisor as long as it does not engage in municipal advisory activities, such as advising the issuer about the purchase of a contract relating to bond proceeds or escrow investments. Advice on the purchase is what takes the provider outside that general rule.

What was the UBS bid-rigging case about?

On May 4, 2011, the SEC charged UBS Financial Services with rigging at least 100 municipal bond reinvestment transactions in 36 states in conduct the SEC dated to 2000 through 2004, with UBS both winning bids as a provider and rigging bids for other providers while acting as a bidding agent. UBS agreed to pay $47.2 million to the SEC and $113 million in parallel cases, $160 million in total, and the allegations were settled without admission.

What is the difference between fair dealing and a fiduciary duty?

Fair dealing is a marketwide conduct standard: the MSRB's fair dealing rule requires each broker, dealer, municipal securities dealer and municipal advisor to deal fairly with all persons and not engage in deceptive, dishonest or unfair practices. A fiduciary duty goes further, requiring a municipal advisor to act in its municipal entity client's best interests without regard to its own.

Sources

  1. SEC Press Release 2011-105 (May 4, 2011), UBS
  2. MSRB Glossary of Municipal Securities Terms
  3. 15 U.S. Code § 78o–4, Registration of municipal advisors
  4. 17 CFR 240.15Ba1-1, municipal advisor definitions
  5. SEC, Registration of Municipal Advisors, Release No. 34-70462
  6. MSRB Rule G-42, Standards of Conduct for Municipal Advisors
  7. MSRB Rule G-17 and the Interpretive Notice Concerning Its Application to Underwriters
  8. MSRB Rule G-23, Restrictions on Financial Advisory Relationships
  9. 26 CFR 1.148-1, definitions; sale proceeds
  10. 26 CFR 1.148-5, yield and valuation of investments
  11. GFOA, Investment and Management of Bond Proceeds

This page is general educational information about municipal finance and federal and state rules as of the date shown. It is not legal, tax or investment advice, and it is not a recommendation about any particular investment. Product availability, legality and suitability depend on the issuer, jurisdiction, governing documents and transaction-specific facts. Final legal and tax determinations remain with the issuer's bond counsel, tax counsel and other advisors.