gsk plc gsk shares rallied 149 to £1461 monday on what proved to be an allaround grim trading session for the stock market with the ftse 100 index ukx falling 082 to 783671 gsk plc closed £1293 below its 52week high £2754 which the company achieved on june 14 trading volume 63 m remained 43 million below its 50day average volume of 106 m editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use