Looking at the universe of stocks we cover at Dividend Channel, on 12/10/13, Invesco Municipal Income Opportunities Trust ( OIA) will trade ex-dividend, for its monthly dividend of $0.035, payable on 12/31/13. As a percentage of OIA's recent stock price of $6.06, this dividend works out to approximately 0.58%, so look for shares of Invesco Municipal Income Opportunities Trust to trade 0.58% lower — all else being equal — when OIA shares open for trading on 12/10/13.Below is a dividend history chart for OIA, showing historical dividends prior to the most recent $0.035 declared by Invesco Municipal Income Opportunities Trust: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from OIA is likely to continue, and whether the current estimated yield of 6.93% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of OIA shares, versus its 200 day moving average: Looking at the chart above, OIA's low point in its 52 week range is $5.91 per share, with $7.78 as the 52 week high point — that compares with a last trade of $6.06. According to the ETF Finder at ETF Channel, OIA makes up 1.23% of the CEF Municipal Income ETF ( XMPT) which is trading relatively unchanged on the day Friday. In Friday trading, Invesco Municipal Income Opportunities Trust shares are currently up about 0.2% on the day.