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 (CF 0.90%), Chesapeake Energy (CHKA.Q) and Ultra Petroleum (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?