national grid plc ng shares inched up 058 to £1047 monday on what proved to be an allaround rough trading session for the stock market with the ftse 100 index ukx falling 006 to 752726 national grid plc closed £183 short of its 52week high £1229 which the company reached on march 31 trading volume 53 m remained 37 million below its 50day average volume of 90 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