the best- and worst-performing biotech stocks

These are the best and worst-performing medical and biotech stocks from Jan. 24 to Jan. 31, a period during which the American Stock Exchange’s Biotechnology Index r0se 0.4%. This screen includes biotechnology and medical companies traded on the New York Stock Exchange, the Nasdaq or the American Stock Exchange that had market capitalizations of more than $300 million at the beginning of the week. The data come from Interactive Data and Thomson Reuters Fundamentals via FactSet Research Systems.

http://www.forbes.com/sites/matthewherper/2014/02/01/the-best-and-worst-performing-biotech-stocks-jan-24-to-jan-31/