10. Efficient markets hypothesis [LO 12.4] For each of the following scenarios, discuss whether profit opportunities exist from trading in the shares of the firm under the conditions that (1) the market is not weak form efficient, (2) the market is weak form but not semistrong form efficient, (3) the market is semistrong form but not strong form efficient and (4) the market is strong form efficient.

1. The share price has risen steadily each day for the past 30 days.

2. The financial statements for a company were released three days ago and you believe you have uncovered some anomalies in the company’s inventory and cost control reporting techniques that are causing the firm’s true liquidity strength to be understated.

3. You observe that the senior managers of a company have been buying a lot of the company’s shares on the open market over the past week.