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Morningstar Quantitative Ratings for Stocks are generated using an algorithm that compares companies that are not under analyst coverage to peer companies that do receive analyst-driven ratings.

Morningstar analysts do not currently cover MPC, but with our powerful screener, you can find stocks in the same sector,industry, or style and filter on our unbiased ratings and valuation metrics.

This price reflects trading activity during the overnight session on the Blue Ocean ATS, available 8 p.m. to 4 a.m. ET, Sunday through Thursday, when regular markets are closed. Chart does not reflect ...