Tue, 22 May 2012 14:37:42 GMT
Natural gas tumbled after strong rally
Energy commodities advanced on Monday ahead of key negotiations between Iran and six major economies regarding Iran's nuclear program.Crude oil surged after China's Premier called for more stimulus for the country's economy in view of recent GDP growth forecast cuts.Brent oil moved up ahead of Iran's negotiations as there are no clear indications of the probable outcome. However, rising OPEC