NEW YORK ( TheStreet) -- The ex-dividend date for MarkWest Energy Partners (NYSE: MWE) is tomorrow, August 2, 2012. Owners of shares as of market close today will be eligible for a dividend of 80 cents per share. At a price of $52.55 as of 9:30 a.m. ET, the dividend yield is 6.1%. The average volume for MarkWest Energy has been 739,600 shares per day over the past 30 days. MarkWest Energy has a market cap of $5.39 billion and is part of the basic materials sector and energy industry. Shares are down 4.7% year to date as of the close of trading on Tuesday. Markwest Energy Partners, L.P., together with its subsidiaries, engages in the gathering, processing, and transportation of natural gas in the southwest, Gulf Coast, and northeast regions of the United States. The company has a P/E ratio of 26, below the average energy industry P/E ratio of 27 and above the S&P 500 P/E ratio of 17.7.
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