O efeito da crise de 2008 nas empresas que compõem os índices da BM&FBOVESPA: uma análise dos impactos da governança corporativa e da liquidez no retorno sobre o preço das ações

Abstract

In 2008, there was a period of credit uncertainty and lack of confidence in financial markets, still present today though on a smaller scale. This research aims to verify the impacts of the adoption of corporate governance practices and of the liquidity effect on return of share prices of companies listed in BM&FBOVESPA in the pre and post -2008 crisis. In such context, the returns of stock prices that make up the Bovespa Index (Ibovespa), Brazil Index 50 (IBrX-50) and Index of Corporate Governance (IGC) were analyzed. With regard to the methodology used in this study, descriptive, quantitative and documentary researches are evidenced. These researches were made by using secondary data collection and statistical analysis through the techniques of linear regression, multiple linear regression of the section type and data analysis panel for wich, techniques for fixed and random effects were used. To begin with, a review on economic theory literature was performed, as well as a study on the causes and effects of the crisis, on the importance of corporate governance practices and also on the effects of liquidity on financial markets, through the analysis of scientific researches and articles published in congresses. Next, the values of the share prices from June/2007 to December/2009 of 141 selected companies were investigated. Stock prices provided by BM&FBOVESPA were used as data source and these data were analyzed statistically. Through the analysis of the statistical tests results, it was not possible to verify if there is significant relationship between the adoption of good corporate governance practices and better returns in the period pre and post 2008 financial crisis. In the analysis of the effects of liquidity on stock returns of companies analyzed in the pre-crisis period, it was not possible to verify significant relationship. As for the effects of liquidity on stock returns of companies analyzed in the post-crisis period, a strong statistically significant correlation was found