shares of national grid plc ng inched up 049 to £1016 tuesday on what proved to be an allaround favorable trading session for the stock market with the ftse 100 index ukx rising 076 to 750289 national grid plc closed £256 short of its 52week high £1271 which the company reached on may 18 trading volume 47 m remained 36 million below its 50day average volume of 84 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