Kara M. Stein is a Commissioner at the U.S. Securities and Exchange Commission. This post is based on Commissioner Stein’s recent remarks at a recent open meeting of the SEC; the complete publication, including footnotes, is available here. The views expressed in the post are those of Commissioner Stein and do not necessarily reflect those of the Securities and Exchange Commission, the other Commissioners, or the Staff.
Today [November 18, 2015], the Commission meets to consider a proposal to increase the transparency of alternative trading systems (ATS). Many ATSs are commonly referred to as “dark pools”. To most people, dark pools are a little bit of a mystery, and that’s because they often function in great secrecy. Today’s proposal seeks to shine a light into that darkness.
Modern ATSs are a product of the rapid technological advances that have revolutionized the way stocks are bought and sold. An ATS is an electronic order matching system operated by a broker-dealer. Much like an exchange, it brings together buyers and sellers. There are many types of ATSs, and they facilitate the purchase and sale of all types of securities ranging from equities to corporate bonds to Treasuries, and more. Unlike an exchange, which must disclose publicly quotes and prices at which securities transactions occur, an ATS can operate in the dark with only limited information about its operations.
