The Capital Asset Pricing Model : a test on the Stock Exchange of Singapore

Abstract

Of the many analytical methods collectively referred to as Modern Portfolio Theory (MPT), the Capital Asset Pricing Model (CAPM) is the most familiar to today's generation of students of finance. The popularity of the CAPM arises from its success in expressing a powerful theoretical insight in a simple, usable form. The primary use of the CAPM is to determine minimum required rates of return from investment in risky assets. The variable in the CAPM is called 'beta', a statistical measure of risk which has become familiar to all finance professionals. Over the past decade, beta has become the most widely recognised and applied measure of risk in the investment community. The model has been extensively tested in the developed capital markets, mainly in the United States of America. But the model has not been extensively tested in other developed and developing countries, often due to the size of the capital market and the lack of the data in these countries. This study attempts to fill this vacuum and tries to update the earlier tests done on the Stock Exchange of Singapore. On addition, a review of the validity of the CAPM over time, as proxied by the stationarity of the beta, is performed. Also, tests regarding heteroskedasticity and its implications have been undertaken.

Date of Award	1999
Original language	English