What is a ‘class period’ in a securities case and how is it determined?
The "class period" is typically the time frame during which it is believed the alleged fraud or other securities law violations artificially inflated the price of the stock at issue in the case. Only those persons who purchased stock during this period are included in the class action suit. The class period is initially determined by plaintiffs' counsel after extensive research and investigation. Sometimes the class period changes during the course of the litigation based on additional information uncovered during the discovery process.