Looking at the universe of stocks we cover at Dividend Channel, on 5/15/13, Black Hills Corporation ( BKH) will trade ex-dividend, for its quarterly dividend of $0.38, payable on 6/1/13. As a percentage of BKH's recent stock price of $49.09, this dividend works out to approximately 0.77%, so look for shares of Black Hills Corporation to trade 0.77% lower — all else being equal — when BKH shares open for trading on 5/15/13.Below is a dividend history chart for BKH, showing historical dividends prior to the most recent $0.38 declared by Black Hills Corporation: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from BKH is likely to continue, and whether the current estimated yield of 3.10% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of BKH shares, versus its 200 day moving average: Looking at the chart above, BKH's low point in its 52 week range is $30.29 per share, with $49.60 as the 52 week high point — that compares with a last trade of $49.08. According to the ETF Finder at ETF Channel, BKH makes up 1.80% of the High Yield Equity Dividend Achievers Portfolio ETF ( PEY) which is trading lower by about 0.2% on the day Monday. In Monday trading, Black Hills Corporation shares are currently down about 0.6% on the day.