In today's video, Fool.com analyst Joel South discusses the domestic oil landscape and looks at a few companies that plummeted on more worries of a global slowdown. Both DuPont and 3M pinpointed slowing sales volumes overseas as significant hurdles over the past quarter, and this trend could adversely affect oil companies that sell their crude to the WTI benchmark. A slowdown overseas could lead to less refined fuel consumption, making the WTI glut in North America even more detached from the international Brent crude price.

Today, small and mid-cap oil and gas players realized much greater capital-gains losses than more diversified producers did. This trend should persist, as the energy market will probably remain extremely volatile during earnings season, with any upset in supply or demand likely to have the market moving their share prices.

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