The head of the Securities and Exchange Commission, Mary Schapiro, announced on Monday she will step down from the agency on December 14.

"Over the past four years we have brought a record number of enforcement actions, engaged in one of the busiest rulemaking periods, and gained greater authority from Congress to better fulfill our mission," Schapiro said in a statement announcing her departure.

(Reporting By Aruna Viswanatha; Editing by Gerald E. McCormick)