OREANDA-NEWS. On 27 May 2008 was announced, that for the week of May 12th – 16th, 2008 the total trading volume on FORTS (Futures & Options on RTS) equaled 424,5 billion rubles or 7,5 million contracts. The total open interest on the last day of the week, May 16th, 2008 reached 415,9 billon rubles or 10,5 million contracts.