Looking at the universe of stocks we cover at Dividend Channel, on 10/11/13, BlackRock MuniVest Fund ( MVF) will trade ex-dividend, for its monthly dividend of $0.059, payable on 11/1/13. As a percentage of MVF's recent stock price of $9.16, this dividend works out to approximately 0.64%, so look for shares of BlackRock MuniVest Fund to trade 0.64% lower — all else being equal — when MVF shares open for trading on 10/11/13.Below is a dividend history chart for MVF, showing historical dividends prior to the most recent $0.059 declared by BlackRock MuniVest Fund: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from MVF is likely to continue, and whether the current estimated yield of 7.73% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of MVF shares, versus its 200 day moving average: Looking at the chart above, MVF's low point in its 52 week range is $8.64 per share, with $12.29 as the 52 week high point — that compares with a last trade of $9.16. According to the ETF Finder at ETF Channel, MVF makes up 1.19% of the CEF Municipal Income ETF ( XMPT) which is trading lower by about 0.3% on the day Wednesday. In Wednesday trading, BlackRock MuniVest Fund shares are currently down about 0.4% on the day.