The concept of 'Efficient Markets' took shape in the seventies explaining the behavior of stock market prices. For the stock market to perform its role of allocating capital resources in an economy successfully, it should be able to process information efficiently. This is seen as the market's ability to incorporate all relevant information quickly and accurately into its prices. This book examines the arguments behind the efficient markets hypothesis and within this context examines the behavior of the Indian stock market. The book throws information on issues such as identifying structural changes in price movements; nature of statistical distribution of returns; market anomalies and the market behavior to policy announcements. The book is expected to be useful for anyone interested in stock market behavior. It will also interest researchers interested in non-parametric statistics.