Looking at the universe of stocks we cover at Dividend Channel, on 5/19/15, Tsakos Energy Navigation Ltd. (TNP) will trade ex-dividend, for its quarterly dividend of $0.06, payable on 5/28/15. As a percentage of TNP's recent stock price of $9.68, this dividend works out to approximately 0.62%, so look for shares of Tsakos Energy Navigation Ltd. to trade 0.62% lower — all else being equal — when TNP shares open for trading on 5/19/15.Below is a dividend history chart for TNP, showing historical dividends prior to the most recent $0.06 declared by Tsakos Energy Navigation Ltd.: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from TNP is likely to continue, and whether the current estimated yield of 2.48% on annualized basis is a reasonable expectation of annual yield going forward.The chart below shows the one year performance of TNP shares, versus its 200 day moving average: Looking at the chart above, TNP's low point in its 52 week range is $4.75 per share, with $9.77 as the 52 week high point — that compares with a last trade of $9.57. According to the ETF Finder at ETF Channel, TNP makes up 2.97% of the Guggenheim Shipping ETF ( SEA) which is trading relatively unchanged on the day Friday. According to Preferred Stock Channel, there are 2 series of preferred stock that are senior to TNP — find out what they are ». In Friday trading, Tsakos Energy Navigation Ltd. shares are currently up about 1.4% on the day.