While the market was open, the New York Stock Exchange also announced that it had curbed certain program trading.

The New York Mercantile Exchange, the world's largest oil market, announced yesterday that it would trade petroleum futures contracts around the clock beginning late next year.

The New York Stock Exchange announced last week that it would buy Archipelago, an electronic trading firm, and become a public company.

The New York Stock Exchange announced yesterday that it had set up a committee to determine whether its self-regulatory system needs to be changed.

Recently, however, the New York Mercantile Exchange announced a 10-year agreement to provide for the trade of on and off exchange uranium futures contracts.

The New York Stock Exchange, meanwhile, announced that its three-day early-closing experiment would now be extended through Friday.

The New York Stock Exchange announced that it would suspend trading in the morning and was planning a formal ceremony.

The New York Stock Exchange announced new corporate governance rules yesterday for companies whose shares trade on the exchange.

Yesterday the New York Stock Exchange announced new rules to strengthen directors' independence that listed companies will have to follow.

Last year, the New York Stock Exchange announced a five-part plan to establish 24-hour trading by the year 2000.