Looking at the universe of stocks we cover at Dividend Channel, on 2/4/14, Williams Partners L.P. ( WPZ) will trade ex-dividend, for its quarterly dividend of $0.8925, payable on 2/13/14. As a percentage of WPZ's recent stock price of $49.77, this dividend works out to approximately 1.79%, so look for shares of Williams Partners L.P. to trade 1.79% lower — all else being equal — when WPZ shares open for trading on 2/4/14.Below is a dividend history chart for WPZ, showing historical dividends prior to the most recent $0.8925 declared by Williams 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 WPZ is likely to continue, and whether the current estimated yield of 7.17% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of WPZ shares, versus its 200 day moving average: Looking at the chart above, WPZ's low point in its 52 week range is $45.37 per share, with $54.66 as the 52 week high point — that compares with a last trade of $49.75. According to the ETF Finder at ETF Channel, WPZ makes up 4.88% of the MLP ETF ( MLPA) which is trading lower by about 1.1% on the day Friday. In Friday trading, Williams Partners L.P. shares are currently off about 0.8% on the day.