Brent crude oil retreated to US$77.6 per barrel Thursday (Jul 5), but still gaining 61.23% year-on-year. Gold, meanwhile, inched up to US$1,258 per ounce to represent 2.8% gain year-on-year. Copper lost 0.81% to US$2.83 per pound, but gain 6.6% year-on-year. But, why shares of Medco Energi (MEDC) lost 43% from its peak in February?To subscribe please click here