Peizer's trading arrangement's helped him avoid more than $12.5 million in losses, according to the Justice Department. David Willingham, an attorney for Peizer, said his client was innocent and that U.S. authorities had disregarded good-faith discussions held "before these cases were filed without any prior notice." Executives can use trading plans under rule 10b5-1 as a defense against insider trading charges by planning to sell shares in advance at predetermined times.
But the prearranged stock selling programs have come under criticism in response to a growing body of academic research indicating some executives have used them for suspiciously well-timed trading. Federal prosecutors and SEC officials have launched a widespread investigation into potential abuses of such plans, according to two sources familiar with the matter. In a recent case, the SEC in September charged Cheetah Mobile Inc's CEO and its former president with insider trading in connection with a trading plan. The SEC in December voted to make changes to the insider trading programs to address concerns over abuse. (Reporting by Douglas Gillison and Kanishka Singh in Washington and Chris Prentice in Miami; editing by Diane Craft)