SR-NASD-2007-008

Proposed Rule Change to Extend the Pilot Periods for NASD Rules 4613A(b) and 5140

NASD is filing with the Securities and Exchange Commission ("SEC" or "Commission") a proposed rule change to extend through January 25, 2008, the current rules regarding the use of multiple Market Participant Symbols ("MPIDs") in NASD Rules 4613A (with respect to the Alternative Display Facility ("ADF")) and 5140 (with respect to Trade Reporting Facilities ("TRFs")).