The Municipal Securities Rulemaking Board (MSRB) today requested approval from the Securities and Exchange Commission (SEC) of a proposal to expand the post-trade data displayed on its Electronic Municipal Market Access (EMMA®) website. Amendments to the MSRB’s Real-Time Transaction Reporting System (RTRS) would require municipal securities dealers to indicate trades executed on an alternative trading system and trades involving non-transaction based compensation arrangements, among other changes.