Question 5 Which of the following statements about market efficiency is false? O A. Weak form tests support the random walk hypothesis O B. Allocational efficiency can be tested by event studies in capital markets O C. Insider trading can produce abnormal returns in a semi-strong form efficient market O D. Weak form efficiency can be investigated by statistical analysis O E. Behavioural finance can help to explain stock market crashes O F. Academics discuss three forms of market efficiency