shares of national grid plc ng inched down 043 to £1036 tuesday on what proved to be an allaround favorable trading session for the stock market with the ftse 100 index ukx rising 036 to 786471 national grid plc closed £236 below its 52week high £1271 which the company achieved on may 18 trading volume 34 m remained 39 million below its 50day average volume of 73 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