Big Splash for the NYSE but are Shares Overvalued?

It's great that NYX has made a splash on a rally, but rallies can fizzle as well as sizzle, so here's just a warning about buying on the high.

NYSE makes dazzling debut

"NEW YORK: The New York Stock Exchange began life as a publicly traded company on Wednesday with a bang, as its stock surged nearly 25% in its market debut.

The day marked the end of the exchange's 213-year history as a member-owned club and the start of its own membership in the red-hot publicly traded exchange sector, with its sights set firmly on future growth through acquisitions and new products.

The NYSE, the world's largest stock exchange, sealed its purchase of electronic rival Archipelago Holdings Inc on Tuesday and joined the two into the new NYSE Group Inc, designed to haul the exchange into the electronic age.

Interest in NYSE shares ran high from the start, mirroring other strong openings for exchanges going public. "