Looking at the universe of stocks we cover at Dividend Channel, on 8/18/14, American Science & Engineering Inc ( ASEI) will trade ex-dividend, for its quarterly dividend of $0.50, payable on 9/3/14. As a percentage of ASEI's recent stock price of $58.12, this dividend works out to approximately 0.86%, so look for shares of American Science & Engineering Inc to trade 0.86% lower — all else being equal — when ASEI shares open for trading on 8/18/14.Below is a dividend history chart for ASEI, showing historical dividends prior to the most recent $0.50 declared by American Science & Engineering Inc: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from ASEI is likely to continue, and whether the current estimated yield of 3.44% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of ASEI shares, versus its 200 day moving average: Looking at the chart above, ASEI's low point in its 52 week range is $55.66 per share, with $74.75 as the 52 week high point — that compares with a last trade of $58.12. According to the ETF Finder at ETF Channel, ASEI makes up 1.23% of the WisdomTree Total Dividend Fund ETF ( DTD) which is trading higher by about 0.2% on the day Thursday. In Thursday trading, American Science & Engineering Inc shares are currently off about 0.3% on the day.