As 2012 comes to a close we want to focus on what drove the tremendous growth at some of the top-performing companies in the materials sector. Starting off the list at No. 10 is Southern Copper (NYSE:SCCO). The company is the No. 1 copper company in the world when measured by reserves. Up over 20% this year, Southern Copper has outperformed its peer group by a hefty margin due to its low cost structure, among other factors. Will this ride continue throughout 2013? Check out the video below where energy and materials analyst, Taylor Muckerman, provides his input on how 2012's momentum will translate moving forward.