Looking at the universe of stocks we cover at Dividend Channel, on 5/18/15, Main Street Capital Corporation ( MAIN) will trade ex-dividend, for its monthly dividend of $0.175, payable on 6/15/15. As a percentage of MAIN's recent stock price of $30.89, this dividend works out to approximately 0.57%, so look for shares of Main Street Capital Corporation to trade 0.57% lower — all else being equal — when MAIN shares open for trading on 5/18/15.Below is a dividend history chart for MAIN, showing historical dividends prior to the most recent $0.175 declared by Main Street Capital Corporation: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from MAIN is likely to continue, and whether the current estimated yield of 6.80% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of MAIN shares, versus its 200 day moving average: Looking at the chart above, MAIN's low point in its 52 week range is $26.42 per share, with $33.47 as the 52 week high point — that compares with a last trade of $30.89. According to the ETF Finder at ETF Channel, MAIN makes up 5.09% of the BDC Income ETF ( BIZD) which is trading up by about 0.5% on the day Thursday. In Thursday trading, Main Street Capital Corporation shares are currently up about 0.3% on the day.