Russia RTS Index Futures Fall as Oil Drops Below $100 a Barrel

    Russia's RTS stock-index futures fell, signaling stocks may extend their four-day drop in Moscow, after oil fell below $100 a barrel in the biggest decline in two years.     Futures on the dollar-denominated index expiring in June tumbled 1.7 percent yesterday. Contracts on OAO Lukoil, Russia's second-biggest oil producer, fell 1.4 percent,...