shares of national grid plc ng inched up 054 to £1031 thursday on what proved to be an allaround positive trading session for the stock market with the ftse 100 index ukx rising 033 to 791115 national grid plc closed £240 below its 52week high £1271 which the company reached on may 18 trading volume 37 m remained 35 million below its 50day average volume of 72 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