Questions o Is the expected return for stocks equal to zero in an efficient o Which hypothesis is being tested if a researcher examines o Which hypothesis is being tested if a researcher examines market? stock price performance following earnings announcements? stock price performance based on a 50-day and 200-day moving average of prices? Which of the following observations would provide evidence against the semi-strong form of the efficient market theory? Mutual fund managers do not on average make superior returns You cannot make superior profits by buying (or selling) stocks after the announcement of an abnormal rise in dividends. Lv P/Estocks ttitive abunormal returna