NEW YORK--(BUSINESS WIRE)-- Tradeweb Markets Inc. (Nasdaq: TW ), a leading, global operator of electronic marketplaces for rates, credit, equities and money markets, today announced that the U.S. Securities and Exchange Commission (SEC) has approved the registration of its swap execution facility, TW SEF LLC, as a security-based swap execution facility (SBSEF) under Regulation SE. This milestone follows the SEC's new Regulation SE requirements mandating that any trading system or platform facilitating the trading or execution of security-based swaps (SBS) among participants, as delineated in the requirements, register with the SEC as either an SBSEF or a national securities exchange. With this approval, TW SEF is now eligible to operate as an SBSEF, thereby enabling institutional clients to trade single-name credit default swaps (CDS) via TW SEF in compliance with this new regulatory framework.