On 2/19/14, Canadian Oil Sands Ltd. (TSX: COS.TO) will trade ex-dividend, for its quarterly dividend of $0.35, payable on 2/28/14. As a percentage of COS's recent stock price of $21.46, this dividend works out to approximately 1.63%, so look for shares of Canadian Oil Sands Ltd. to trade 1.63% lower — all else being equal — when COS shares open for trading on 2/19/14.Below is a dividend history chart for COS, showing historical dividends prior to the most recent $0.35 declared by Canadian Oil Sands Ltd.: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from COS is likely to continue, and whether the current estimated yield of 6.52% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of COS shares, versus its 200 day moving average: Looking at the chart above, COS's low point in its 52 week range is $18.62 per share, with $21.84 as the 52 week high point — that compares with a last trade of $21.45. According to the ETF Finder at ETF Channel, COS makes up 7.30% of the Guggenheim Canadian Energy Income ETF ( ENY) which is trading higher by about 0.6% on the day Tuesday. In Tuesday trading, Canadian Oil Sands Ltd. shares are currently up about 0.5% on the day.