Zynga (ZNGA) stumbles as CEO quits

Zynga, Inc.

shares declined 14.5% to $2.48 after the company announced the resignation of its CEO Don Mattrick. The company said Mark Pincus, founder and chairman of Zynga, has returned to his role as the company's CEO. Share volume totaled 70 million, compared to an all-day average of 16.5 million