The following video is from Thursday's Digging for Value in which host Alison Southwick and Motley Fool energy analysts Joel South and Taylor Muckerman dig into the most exciting stories in energy investing today.
In this segment as part of the Motley Fool's "Ask a Fool" series, Fool energy analyst Joel South takes a question from a reader, who asks, "Why is Northern Tier Energy (NYSE: NTI) plunging? Is it because of the narrowing spread between WTI and WCS? Or the planned cracking unit shutdown in October? Is this a buying opportunity?"
