Looking at the universe of stocks we cover at Dividend Channel, on 6/26/13, Willis Group Holdings plc ( WSH) will trade ex-dividend, for its quarterly dividend of $0.28, payable on 7/15/13. As a percentage of WSH's recent stock price of $40.57, this dividend works out to approximately 0.69%, so look for shares of Willis Group Holdings plc to trade 0.69% lower — all else being equal — when WSH shares open for trading on 6/26/13.Below is a dividend history chart for WSH, showing historical dividends prior to the most recent $0.28 declared by Willis Group Holdings plc: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from WSH is likely to continue, and whether the current estimated yield of 2.76% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of WSH shares, versus its 200 day moving average: Looking at the chart above, WSH's low point in its 52 week range is $31.98 per share, with $43.02 as the 52 week high point — that compares with a last trade of $40.57. According to the ETF Finder at ETF Channel, WSH makes up 1.24% of the Guggenheim Mid-Cap Core ETF ( CZA) which is trading lower by about 1.5% on the day Monday. In Monday trading, Willis Group Holdings plc shares are currently off about 1.8% on the day.