** London-listed shares of Rio Tinto RIO.L fall 2.4% at 4,535.5 pence

** Stock among top losers on FTSE 100 .FTSE index, which is down 0.4%

** Co posts smallest H1 underlying profit in five years, down 16% YOY, on weak iron ore prices

** Including session's moves, RIO down ~5%, FTSE up ~11% YTD

(Reporting by Nithyashree R B in Bengaluru)

((NithyashreeRB@thomsonreuters.com))