Only the Oil & Gas Storage & Transportation sub-industry is expected to report positive earnings growth at 13%. Similarly, the energy sector is expected to report the largest revenue decline amongst the 11 U.S. market sectors, thanks to lower oil and gas prices. 3 of the 5 sub-industries in the sector are predicted to report revenue declines, led by Oil & Gas Refining & Marketing (-15%), Integrated Oil & Gas (-14%), and Oil & Gas Equipment & Services (-7%). On the other hand, Oil & Gas Storage & Transportation( and Oil & Gas Exploration & Production are expected to report year-over-year increases in revenue by 24% and 10%, respectively. Related: Big Oil Braces for Oil Price Hit Big Oil companies have been the largest contributors to the decrease in expected earnings, led by Chevron Corp. (from $2.53 to $1.76), Exxon Mobi l ( from $1.78 to $1.53), ConocoPhillips (from $1.84 to $1.38), Hess Corporation (from $1.71 to $1.20), Valero Energy (from $2.66 to $1.87) and Occidental Petroleum (from $0.77 to $0.37).