NEW YORK (MarketWatch) - Russian stocks tumbled Tuesday, prompting the RTS and the Micex stock exchanges to suspend trading for one hour at 4:05 p.m. Moscow time. The dollar-denominated RTS stock index plunged 9.4%, while the ruble-denominated Micex stock index fell 9.6%. The decline in Russia followed a tumble in oil prices and declines on global stock markets. In New York, the Market Vectors Russia ETF RSX, -0.52% , which tracks the Russian markets, tumbled 14.4%.