Using data for the last two years, report the price movement at the time of the dividend announcements. How do you interpret these price movements in...

Using data for the last two years, report the price movement at the time of the dividend announcements. How do you interpret these price movements in light of finance theory?

here is theTelstra data :https://finance.yahoo.com/quote/TLS.AX/history?period1=1451566800&period2=1514638800&interval=1d&filter=history&frequency=1d