shares of national grid plc ng inched up 066 to £1062 monday on what proved to be an allaround grim trading session for the stock market with the ftse 100 index ukx falling 010 to 759999 national grid plc closed £167 below its 52week high £1229 which the company reached on march 31 trading volume 67 m remained 13 million below its 50day average volume of 80 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