rio tinto plc rio shares inched down 005 to £5609 monday on what proved to be an allaround favorable trading session for the stock market with the ftse 100 index ukx rising 040 to 736131 rio tinto plc closed £734 below its 52week high £6343 which the company reached on march 3 trading volume 18 m remained 15 million below its 50day average volume of 33 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