On 3/26/13, Sherritt International Corp. (Toronto: S) will trade ex-dividend, for its quarterly dividend of $0.043, payable on 4/12/13. As a percentage of S’s recent stock price of $5.11, this dividend works out to approximately 0.84%, so look for shares of Sherritt International Corp. to trade 0.84% lower — all else being equal — when S shares open for trading on 3/26/13.
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Below is a dividend history chart for S, showing historical dividends prior to the most recent $0.043 declared by Sherritt International Corp.:

In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from S is likely to continue, and whether the current estimated yield of 3.37% on annualized basis is a reasonable expectation of annual yield going forward.