Looking at the universe of stocks we cover at Dividend Channel, on 5/1/13, Oiltanking Partners LP ( OILT) will trade ex-dividend, for its quarterly dividend of $0.405, payable on 5/14/13. As a percentage of OILT's recent stock price of $50.39, this dividend works out to approximately 0.80%, so look for shares of Oiltanking Partners LP to trade 0.80% lower — all else being equal — when OILT shares open for trading on 5/1/13.Below is a dividend history chart for OILT, showing historical dividends prior to the most recent $0.405 declared by Oiltanking Partners LP: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from OILT is likely to continue, and whether the current estimated yield of 3.22% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of OILT shares, versus its 200 day moving average: Looking at the chart above, OILT's low point in its 52 week range is $27.65 per share, with $53.20 as the 52 week high point — that compares with a last trade of $50.19. According to the ETF Finder at ETF Channel, OILT makes up 2.28% of the Direxion All Cap Insider Sentiment Shares ETF ( KNOW) which is trading relatively unchanged on the day Monday. In Monday trading, Oiltanking Partners LP shares are currently up about 0.8% on the day.