Weaker December ends great year for FortsForts, the futures and options segment of the Russian Trading System Stock Exchange, has suffered a sharp monthly decline in trading volumes for options, relative to November.Trading volumes for all options declined by 35% to 1.24m contracts, while open interest was down 68%, to Rb17.4bn ($590m).Futures fared slightly better, with trading volumes declining 14% to 37.9m, from 43.9m in November. Total open interest for all futures contracts still dropped by nearly a third, however, to Rb67bn rubles from November’s Rb99.4bn.Set against Forts’ performance a year ago, however, the figures look excellent. The exchange thrived during 2009 with growth in all its main products: currency futures, RTS Index Futures and single stock futures.In December 2008 RTS’s total futures volume was 15.5m contracts –...