rio tinto plc rio shares inched up 096 to £5663 tuesday on what proved to be an allaround positive trading session for the stock market with the ftse 100 index ukx rising 013 to 737062 rio tinto plc closed £680 below its 52week high £6343 which the company reached on march 3 trading volume 13 m remained 20 million below its 50day average volume of 34 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