Aetna, SurModics shares get earnings boost

11:29 a.m. EDT By Russ Britt, MarketWatch LOS ANGELES (MarketWatch) ��� Shares of insurance giant Aetna Inc. and a small medical products maker, SurModics Inc., got a lift Thursday from favorable earnings reports. While SurModics (NASDAQ:SRDX) Aetna said...