Marathon Petroleum  (MPC - Get Report) is expected to report quarterly earnings of 5 cents a share on sales of $28.9 billion before the market opens on Wednesday, based on a FactSet survey of 17 analysts.

In the same period a year ago, the company posted earnings of 8 cents a share on sales of $19 billion.

The stock has fallen 6.6% since the company last reported earnings on Feb. 7.

Quarterly estimates have fallen 34.5 cents a share in the past month. Marathon Petroleum is currently trading at a price-to-forward-earnings ratio of 8.7 based on the 12-month estimates of 17 analysts surveyed by FactSet.

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