NEW YORK (TheStreet) -- Here are this week's weekly winners and losers.
iShares Dow Jones U.S. Oil & Gas Exploration & Production Index Fund ( IEO) -4.2% After starting the week on a sour note, the equity-based IEO struggled to regain footing. Despite its persistent climb higher, oil prices could prove choppy in the near future. Analysts are beginning to speculate whether the current price levels will weigh on demand. Market Vectors Russia ETF ( RSX) -4.6% Due to its heavy exposure to oil and gas goliaths including Gazprom and Lukoil, the Russia ETF has traditionally been influenced by the performance of the global energy markets. Therefore, it is not surprising that RSX faced pressure over the past week. This week the ETF industry welcomed the launch of a new product aimed at tracking the Russian marketplace. Following the success of RSX, Van Eck unveiled the Market Vectors Russia Small Cap ETF ( RSXJ), which is designed to track the smallest publicly traded Russian companies. Although, like RSX, RSXJ boasts notable exposure to the energy industry, the largest chunks of the fund's portfolio are dedicated to the utilities and materials industries. Written by Don Dion in Williamstown, Mass.