Identify one dividend change $($interim or final$)$ announcement $($note: compare interim to interim to identify changes in interim dividend or final to final to identify changes in final dividend using $$dividend history from the DatAnalysis Premium Database$$ for the company allocated to you$).$ Identify the interim announcement date from the half$-$yearly report or final announcement date from the preliminary final report.

$($i$)$ Calculate

$$ The three$-$day return earned by your firm for the period from the day before the announcement day to the day after the announcement date

$$ The two$-$day return earned by your firm for the period from the day of the announcement to the day after the announcement date

$($ii$)$ Calculate the market return for the corresponding periods in $($i$).$

$($iii$)$ Calculate the excess return: $($i$)-($ii$)$