SUMMARY
This study analyzed whether the level of voluntary disclosure in the Brazilian market affects the cost of capital of companies listed on Bovespa during the period covering 2008 through 2012. The sample was composed of 46 Brazilian non-financial institutions, building on and complementing previous research such as that carried out by Lima, Lima, Favero and Galdi (2007), Murcia and Santos (2009a), and Li and Yang (2013). The panel data regression model is employed to relate the independent variables with the following dependent variables: Cost of Equity, Cost of Debt and Weighted Average Cost of Capital. Findings permit the conclusion that some voluntary disclosure practices influence the cost of capital, i.e., when a company chooses to voluntarily disclose information in its annual reports, this information can affect its cost of equity and cost of debt.