This book provides evidence of stock market reaction to earnings announcement during a recessionary period of the business cycle, provides evidence of the earnings'' informativeness and provide evidence with regard to capital market efficiency of the Johannesburg Stock Exchange (JSE) ALT-X stock market. Empirical evidence demonstrates that there is substantial negative share price reaction to earnings announcements on the ALT-X stock market. The study in this book indicated that the information content of earnings is quite noticeable; however, during the event window chosen there was a constant stream of information, and no price recovery was observed in this study. The JSE ALT-X also shows the weak form of market efficiency. The research findings on which this book is based on have practical implications for investors, practitioners and academics alike. The findings shed light on the behaviour of a small ALT-X stock market in relation to finance theory.