A sudden stock drop after earnings does not, by itself, prove securities fraud. A potential claim usually requires evidence that the company made a materially false or misleading statement or omitted material information, acted with the required intent, and caused investors to lose money when the truth reached the market. Selling your shares does not automatically prevent participation. Missing the 60-day Lead Plaintiff deadline usually affects only your opportunity to seek the leadership role, not your ability to remain an eligible class member or submit a later settlement claim.