Halftime Report Trader: Buy this energy stock despite oil slide

A Marathon gas station in Chicago.
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CNBC "Halftime Report" trader Jim Lebenthal is buying an energy stock he believes will move higher regardless of the direction of oil prices.

In the past month, the value of WTI crude oil has sharply sold off, down about 20 percent to $48 per barrel, on the back of oversupply concerns paired with tepid economic growth, particularly in China.

But as the commodity rolls over, the chief investment officer of Lebenthal Asset Management is selling shares of BP in favor of Marathon Petroleum for his model portfolio.