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Welcome to the
Municipal Securities Rulemaking Board

The MSRB protects and strengthens the municipal bond market, enabling access to capital, economic growth, and societal progress in tens of thousands of communities across the country.

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What’s New at the MSRB?

MSRB Rules & Interpretive Guidance

Requests for Comment, Notices &
Compliance Resources

How we fulfill our mission:
beyond rulemaking

Data & Research

MSRB data sets and original research help deepen understanding of municipal market trends.


MSRB resources empower investors and issuers to make informed decisions and facilitate compliance for regulated entities.


The MSRB is governed by a board of market experts and supported by a team of professional staff.

Report a Complaint

Learn how to report a municipal market complaint.

Electronic Municipal Market Access

The MSRB’s free EMMA website serves as the official
source for municipal securities data and documents.

Electronic Municipal Market Access Labs

Explore our innovation sandbox and co-create
the future of market transparency.