glencore plc glen shares shed 392 to £503 monday on what proved to be an allaround grim trading session for the stock market with the ftse 100 index ukx falling 022 to 792979 glencore plc closed 8200 pence short of its 52week high £585 which the company reached on january 18 trading volume 258 m remained 255 million below its 50day average volume of 513 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