I'm using historical stock data, and I am wondering if I need to account for dividends, splits, and corporate actions during a trading day? I know that they often occur at the end of the day, and an adjusted close price would reflect that. Basically, can I interpret intraday data literally?
Second, is the market opening price always equal to the adjusted close of the previous trading day?
Third, Using Yahoo Finance APIs, I am able to obtain dividend and split info via http://ichart.finance.yahoo.com/x?s=GOOG&g=v. Is there a way to tell whether a dividend was a stock dividend or a cash dividend?