Shares of GSK PLC GSK slid 4.90% to £13.79 Wednesday, on what proved to be an all-around rough trading session for the stock ...

The FTSE 100 index ended down 38.09 points, 0.4%, at 8,559.33. The FTSE 250 fell 15.49 points, 0.1%, at 20,337.00, while the AIM All-Share rose 2.92 points, 0.4%, at 713.26.