This segment is from Thursday's edition of 'Digging for Value', in which sector analysts Joel South and Taylor Muckerman discuss energy & materials news with host Alison Southwick. The twice-weekly show can be viewed on Tuesdays & Thursdays. It can also be found on Twitter, along with our extended coverage of the energy & materials sectors @TMFEnergy.

Natural gas and crude oil prices experienced different fates in the last quarter of 2013. On one side, natural gas prices started under $4 per million British thermal units, or mmBtu, and peaked near $4.50. To counter that, oil fell back to double digits, ending near $92 per barrel. With moves like these, producers are bound to have been affected. Analyst Taylor Muckerman is keeping his eye on CF Industries (NYSE:CF), Chesapeake Energy (NYSE:CHK) and Ultra Petroleum (NASDAQ:UPL) to tell the story. Find out more in the clip below.

Why not check out the earnings of our "Top Stock of 2014" as well?