2. Optimer Pharmaceuticals, Inc. (OPTR): Focuses on discovering, developing and commercializing hospital specialty products worldwide. Market cap of $488.37M. Current ratio at 13.97, quick ratio at 13.85. Long-term debt/equity at 0. Net institutional shares purchased over the current quarter at 7.0M, which is 16.56% of the company's 42.26M share float. The stock is a short squeeze candidate, with a short float at 15.59% (equivalent to 10.1 days of average volume). The stock has had a couple of great days, gaining 20.05% over the last week.