With greater than half of its annual revenue coming from North America, Halliburton (HAL -1.46%) investors always keep their eye on how this segment performs. Luckily for them, things could be turning around in 2013. Company management believes that the margin contraction that has been seen in North America during 2012 has likely bottomed out and should reverse in 2013. Energy and materials analyst Taylor Muckerman discusses this and more in the video below.