CNBC said it has launched an investigation into complaints of unusual trading among some of the 20 finalists in the CNBC Million Dollar Portfolio Challenge, which ended May 25.
In a statement, CNBC said it has been contacted by several contestants alleging unusual trading in violation of contest rules.
"Once these questions were raised, CNBC immediately launched a thorough investigation to determine who may have violated the rules."
"As the rules state, CNBC has until July 8, 2007 to declare a winner. Although CNBC hopes to announce a winner before that date, it is more important to ensure the individual awarded the Grand Prize is in compliance with the rules."