what is emma
The Electronic Municipal Market Access system, or EMMAÂ®, is the official repository for information on virtually all municipal securities. EMMA provides free public access to official disclosures, trade data, credit ratings, educational materials and other information about the municipal securities market.MMA is a service of the Municipal Securities Rulemaking Board (MSRB). The MSRB protects investors, state and local governments and other municipal entities, and the public interest by promoting a fair and efficient municipal securities market.