Notice of Filing and Effectiveness of Amendment No. 18 to the Joint Self-Regulatory Organization Plan Governing the Collection, Consolidation and Dissemination of Quotation and Transaction Information for Nasdaq-Listed Securities Traded on Exchanges on an Unlisted Trading Privileges Basis, Submitted by the American Stock Exchange LLC, the Boston Stock Exchange, Inc., the Chicago Stock Exchange, Inc., the Chicago Board Options Exchange, Inc., the International Securities Exchange, Inc., the National Association of Securities Dealers, Inc., the National Stock Exchange, Inc., the Nasdaq Stock Market LLC, NYSE Arca, Inc., and the Philadelphia Stock Exchange, Inc.