Exelixis (EXEL) shares ended the last trading session 8.6% higher at $28.50. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session. This compares to the stock's 4.5% loss over the past four weeks. Exelixis' shares gained on a favorable court ruling against MSN Laboratories for a generic product of lead drug Cabometyx (related to cabozantinib). The Delaware District Court ruled in Exelixis' favor, rejecting MSN's challenge to three listed patents rela ...