NYSE Euronext is moving the timing of the American Stock Exchange equities integration to early December from mid-September. In connection with this, we are cancelling the industry test that had been scheduled for Aug. 23. As a reminder, the equities integration will transition trading from Amex/AEMI systems to the NYSE Alternext brand, using NYSE systems.

The NYSE will decommission the Common Message Switch (CMS) as of December 31, 2008. It is important that your firm begin the conversion process from CMS to the Common Customer Gateway (CCG) as soon as possible. In addition, the NYSE will not accept requests for new CMS sessions after October 3, 2008.
NYSE Trading Technology Memo
NYSE Fix Specification & User Guide Version 3.5.1

The New York Stock Exchange is rolling out two new technologies that, respectively, give brokers on the NYSE trading floor the ability to trade algorithmically, and strengthen the brokers’ ability to locate large sources of liquidity.
NYSE News Release

The NYSE New Market Model Initiative is on track to begin roll out in late August or early September. See the updated Rule Filing for additional details, and if you haven't yet, see "Evolution of the NYSE Market Model" for an Initiative overview.
Rule Filing SR-NYSE-2008 Amendment No. 1

Reflecting our ongoing commitment to customers of the New York Stock Exchange, today we filed with the Securities and Exchange Commission a package of new rules and amendments to existing rules that will further enhance the performance, quality and competitiveness of the NYSE.

Effective November 1, 2007, the SEC has extended the operation of an NYSE pilot regarding Specialist Stabilization requirements to all NYSE Securities.
Market Surveillance Information Memo

January 16th, 2008 will be NYSE’s operative date for processing of the new SEC approved Riskless Principal Trading Orders. This memo provides information regarding the necessary technology changes member firms will be required to make to use the new facility and comply with the associated NYSE Rule 92 reporting requirements.
Technology Information Memo

Effective October 12th, the NYSE will begin implementation of new software that will publish specialist interest to the NYSE OpenBook, intermingled with other limited interest, as well as enable the specialist to open stocks on a quote electronically from their Specialist API.
Market Surveillance Information Memo