The regulator has almost never announced that an investigation was under way, making its immediate investigation of Citigroup unusual.

One week ago regulators and the nation's top investment firms announced what they described as a historic settlement.

In January, regulators announced that the brokerage firm would be liquidated by a court-appointed trustee.

The two regulators also announced the formation of a committee to recommend changes in the way brokerage firms allocate initial stock offerings.

The sanctions are to be disclosed when regulators announce the final agreement in the $1.4 billion investment banking research settlement.

In November 2007 regulators announced the award of four new broadcast licences after a process that saw 18 applications.

European antitrust regulators, who began an investigation of the proposed takeover last November, have not yet announced their decision.

Nearly every week, regulators announce a new initiative aimed at shoring up the slumping market.

Financial regulators on Monday announced the creation of an international board to oversee the setting of auditing standards.

After 27 years of study and numerous objections by the auto industry, federal regulators announced plans on May 25 to begin the ratings this autumn.