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Rules with Recent

Expanded Compact
Number Name Status Rule Category Regulated Entity
Rule G-18 Best Execution Fair Practice Dealers, Bank Dealers
Rule G-27 Supervision
Regulated Entity Administration Dealers, Bank Dealers, Municipal Fund Securities
Rule D-15 Sophisticated Municipal Market Professional Dealers, Bank Dealers
Rule G-18
Last Updated: 09/17/2015
Best Execution

Rule Summary: Requires dealers to use reasonable diligence to ascertain the best market for the subject security and buy or sell in that market so that the resultant price to the customer is as favorable as possible under prevailing market conditions.

Rule for:

Dealers, Bank Dealers

Status:
Rule G-27
Last Updated: 07/01/2024
Supervision

Rule Summary: Outlines requirements for a dealer’s supervision of personnel engaged in activities involving municipal securities activities.

Rule for:

Dealers, Bank Dealers, Municipal Fund Securities

Status:
Request for Comment (01/14/2026)
Request for Comment on MSRB Rule G-27 on Dealer Supervision
View Notice
Rule D-15
Last Updated: No amendment history
Sophisticated Municipal Market Professional
Rule for:

Dealers, Bank Dealers

Status:
Request for Comment (11/03/2025)
Request for Comment on MSRB Rule D-15 Defining the Term Sophisticated Municipal Market Professional
View Notice
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