Moscow Exchange will renew the perpetual futures contract for the dollar-ruble pair in December. When calculating the variation margin, deviations of the futures price from the price of the underlying asset will be taken into account. "If you are a short position holder and the price in the 'put' is higher than the spot market price, you will receive the difference at a fixed rate, and the holder of a long position will pay it, respectively, and vice versa," explained Maria Patrikeyeva, head of the futures market of Moscow Exchange at the Smart-Lab conference.