Looking at the universe of stocks we cover at Dividend Channel, on 10/28/13, Western Refining Inc ( WNR) will trade ex-dividend, for its quarterly dividend of $0.22, payable on 11/14/13. As a percentage of WNR's recent stock price of $33.80, this dividend works out to approximately 0.65%, so look for shares of Western Refining Inc to trade 0.65% lower — all else being equal — when WNR shares open for trading on 10/28/13.Below is a dividend history chart for WNR, showing historical dividends prior to the most recent $0.22 declared by Western Refining Inc: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from WNR is likely to continue, and whether the current estimated yield of 2.60% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of WNR shares, versus its 200 day moving average: Looking at the chart above, WNR's low point in its 52 week range is $23.67 per share, with $39.42 as the 52 week high point — that compares with a last trade of $33.70. According to the ETF Finder at ETF Channel, WNR makes up 2.83% of the Dynamic Energy Exploration & Production Portfolio ETF ( PXE) which is trading lower by about 0.5% on the day Thursday. In Thursday trading, Western Refining Inc shares are currently down about 1.8% on the day.