Power3 Medical Products, Inc. is a leading bio-technology company focused on the development of innovative diagnostic tests in the fields of cancer and neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease and amyotrophic lateral sclerosis (commonly known as ALS or Lou Gehrig's disease).

Gastar Exploration Ltd. (Amex:GST) announced that Gastar Exploration USA, Inc., the wholly-owned subsidiary of the Company ("Gastar USA") (NYSE Amex: GST.PRA), has declared a monthly cash dividend on its 8.625% Series A Preferred Stock ("Series A Preferred Stock") for June and July 2011.

Weekly roundup of stocks moving in and out of Joel Greenblatt's Magic Formula Investing screens.

One weakness of Magic Formula Investing is an ignorance of past overpayments for growth acquisitions. This article explains why every investor should consider how efficiently a company expands, how to spot inefficient "empire builders", and a list of MFI stocks on both sides of the coin.