Looking at the universe of stocks we cover at Dividend Channel, on 5/5/14, Markwest Energy Partners L.P. ( MWE) will trade ex-dividend, for its quarterly dividend of $0.87, payable on 5/15/14. As a percentage of MWE's recent stock price of $63.62, this dividend works out to approximately 1.37%, so look for shares of Markwest Energy Partners L.P. to trade 1.37% lower — all else being equal — when MWE shares open for trading on 5/5/14.Below is a dividend history chart for MWE, showing historical dividends prior to the most recent $0.87 declared by Markwest Energy Partners L.P.: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from MWE is likely to continue, and whether the current estimated yield of 5.47% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of MWE shares, versus its 200 day moving average: Looking at the chart above, MWE's low point in its 52 week range is $60.25 per share, with $75.79 as the 52 week high point — that compares with a last trade of $63.62. According to the ETF Finder at ETF Channel, MWE makes up 4.91% of the MLP ETF ( MLPA) which is trading lower by about 0.2% on the day Thursday. In Thursday trading, Markwest Energy Partners L.P. shares are currently up about 0.4% on the day.