The information content of option implied volatility surrounding the 1997 Hong Kong stock market crash

This study examines the information conveyed by options and examines their implied volatility at the time of the 1997 Hong Kong stock market crash. The author determines the efficiency of implied volatility as a predictor of future volatility by comparing it to other leading indicator candidates. These include volume and open interest of index options and futures, as well as the arbitrage basis of index futures. Using monthly, nonoverlapping data, the study reveals that implied volatility is superior to those variables in forecasting future realized volatility. The study also demonstrates that a simple signal extraction model could have produced useful warning signals prior to periods of extreme volatility. These results indicate that the options market is highly efficient informationally. © 2007 Wiley Periodicals, Inc. Jrl Fut Mark 27:555–574, 2007     

Auditing Standards in China—A Comparative Analysis with Relevant International Standards and Guidelines

The continuing and deepening economic reforms in China have brought many changes both socially and economically to the society. The primary function of auditing in China has begun to shift away from the traditional tax compliance assessment towards the credibility lending to financial statements. The economic reforms and the development of the Accounting Standards for Business Enterprises have necessitated the parallel development of auditing standards in China. While some significant differences exist, the new Chinese auditing standards are, in a number of important aspects, similar to the professional standards promulgated by the International Federation of Accountants. The development of a comprehensive body of standards, auditor independence, the role of certain auditing techniques, and certified public accountant (CPA) population are the major areas that China needs to improve. Opening up the Chinese accounting industry will trigger significant advances in the implementation of Chinese standards and the development of the Chinese accounting profession.     

What determines early exercise of employee stock options in Australia?

Employee stock options (ESOs) are a popular way of remunerating employees. We analyse factors at the firm and option level affecting the employee's decision to exercise ESOs before they mature. Exercises over the period 1998–2004 are analysed and the key factor influencing early exercise is found to be dividends. Exercises frequently occur well before maturity, but in most cases little time value is sacrificed. Our findings have implications for the ‘fair’ valuation of ESOs in companies’ financial statements, as required by the relevant Australian accounting standard, AASB 2.     

The Best Teacher I Ever Had

Teaching Business Ethics -