State Street Global Advisors, the second-biggest exchange-traded fund provider in the world, launched a Russia ETF on Thursday, making it and Van Eck Global the only fund companies offering investment exposure to the energy-rich country using ETFs.

Russia’s economic success in the past few years has much to do with a resurgence of its energy sector. It’s now the world’s top gas producer and its second-largest oil producer, according to U.S. government data. Almost half of Boston-based SSgA’s new fund, the SPDR S&P Russia ETF (NYSEArca: RBL), is allocated to energy. Its largest holding, Gazprom, makes up 18.7 percent, with Lukoil Oil Co. the fourth-largest, at 6.37 percent. It’s based on the S&P Russia Capped BMI Index.

Van Eck’s Market Vectors Russia ETF (NYSEArca: RSX) is also heavily skewed toward energy. More than 48 percent of its benchmark, the DAXglobal Russia+ Index, is energy-related companies. Gazprom and Lukoil are its No. 2 and No. 3 holdings, behind Sberbank.

SSgA’s Russia ETF has 17.9 percent in materials, while RSX allocates 17.3 percent to what it classifies as iron and/or steel. Telecommunications stocks make up 8.7 percent of RBL and 11.8 percent of RSX. Financial companies make up 11.7 percent of RBL and 13 percent of RSX.

Overall, RBL’s benchmark has 72 companies, while RSX holds half as many.

SSgA’s RBL has an annual management fee of 0.59 percent, or 59 basis points, compared with 62 basis points for RSX. (100 basis points equals 1 percentage point.)