NYX Among The 1,679 Issues Trading In NYSE Hybrid Market<SUP>SM</SUP> - Underscores The Success And Reliability Of The Hybrid Market System

NYSE Group, Inc. (NYSE: NYX) today announced that the common stock of the NYSE Group, Inc. began trading on the NYSE Hybrid Market^SM platform.   As part of the 354 issues added to the Hybrid Market on Thursday, Dec. 14, NYX is one of 1,679 NYSE listed securities currently trading in Phase III, which is expected to conclude in early Jan. 2007.

“The addition of NYSE Group, NYX, to the Hybrid Market further reflects our commitment to and confidence in our new system,” said John A. Thain, NYSE CEO.  “We look forward to adding all NYSE listed securities to the Hybrid Market platform and to continuing to provide investors and issuers with the highest levels of market quality.”

Combining the market quality benefits of specialist and floor broker expertise with the speed and certainty of electronic executions, the NYSE Hybrid Market offers customers a new level of choice combined with the NYSE’s established, proven market structure that provides the world’s largest and most liquid marketplace.

For a detailed list of current Hybrid Market features, status reports and previously implemented phases, visit: http://www.nyse.com/hybrid and http://hybridtalk.nyse.com.