FINRA provided guidance on whether dates that securities markets unexpectedly close for business should be considered as either a regular business day or non-business day for purposes of broker-dealer financial, operational and reporting rules.

The MSRB will update its Electronic Municipal Market Access ("EMMA") website to accept and display two new municipal securities disclosure types under recently amended Exchange Rule 15c-12. The recent amendments to Exchange Rule 15c2-12 require municipal securities issuers to disclose material financial obligations that could impact the issuer's liquidity and overall creditworthiness. MSRB representatives, along with the SEC, National Association of Bond Lawyers, and Government Finance Officers Association will host a free webinar on January 18, 2019, to give the issuer community additional

The SEC issued a final rule making technical corrections to Form N-1A, the registration form used by open-end management investment companies. The final rule is effective on December 4, 2018.

ISDA provided guidance on the operation of OTC derivatives transactions affected by the closure of certain U.S. markets on Wednesday, December 5, 2018.