The following video is from Thursday's edition of Investor Beat, in which host Chris Hill, and Motley Fool analysts Jason Moser and Taylor Muckerman, dissect the hardest-hitting investing stories of the day.

Citrix Systems (NASDAQ:CTXS) is down after lowering guidance on its upcoming quarterly results. Ruby Tuesday (NYSE:RT) fell hard to a 52-week low after terrible first-quarter results, including same store sales falling 11%. Sirius XM (NASDAQ:SIRI) is up on the news that the company will spend an additional $2 billion on share buybacks. And Facebook (NASDAQ:FB) rises on news that spending on mobile advertising more than doubled in the first half of 2013. In this segment, Jason and Taylor discuss four stocks making big moves.