Shares of Marathon Petroleum popped on Thursday making it TheStreet's Move of the Day. Amid one of the worst sessions for the S&P 500 this year, Marathon Petroleum led the benchmark index after reporting stronger-than-expected earnings that were driven by widening margins on its refining operations in the Gulf of Mexico. The company reported second-quarter earnings of $2.94 a share, beating Wall Street's forecast for $2.20 a share. The company said in its earnings statement: "The increase was primarily due to more favorable net product price realizations and a higher U.S. Gulf Coast crack spread, partially offset by a narrower West Texas Intermediate and Light Louisiana Sweet crude oil differential."

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