Consol Energy ( CNX) added 15.4% at close last week after Standard & Poor's Ratings Service removed CNX from watch for upgrade, suggesting a potential rating boost by giving it a positive outlook. Meanwhile, as aluminum prices surged 5.4% to $2,125.5 per metric ton, Alumina ( AWC) and Kaiser Aluminum ( KALU) soared 14.6% and 14.1% higher last week, respectively. Meanwhile, industry majors like BHP Billiton ( BHP), Rio Tinto ( RIO) and Vale ( VALE) moved up 13.5%, 12.6% and 7.3%, respectively. Ternium was at the helm of losers' last week, down 11.7% after Bank of America downgraded the stock's rating from buy to neutral. Compania de Minas Buenaventura followed, sliding 6.4%.