rio tinto plc rio shares inched up 043 to £6318 monday on what proved to be an allaround favorable trading session for the stock market with the ftse 100 index ukx rising 025 to 778487 rio tinto plc closed 8800 pence below its 52week high £6406 which the company reached on january 26 trading volume 15 m remained 14 million below its 50day average volume of 28 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