Exact Sciences (EXAS +12.4%), pops on a valuation upgrade from Rodman & Renshaw. The firm...

|By:, SA News Editor

Exact Sciences (EXAS +12.4%), pops on a valuation upgrade from Rodman & Renshaw. The firm says the stock has been one of the best performers in the biotech sector over the last two years, and took a "disproportionate beating" during the recent selloff.