We study the relationship between the volatility and the price of stocks and the impact that variables such as past volatility, financial gearing, interest rates, stock return and turnover have on the present volatility of these securities. The results show the persistent behavior of volatility...

There is a lot of misunderstanding about derivative markets. Many people believes that they are a kind of casinos and have no utility to the investors. This work looks on the effects of options introduction in the Brazilian market, seeking for another benefit for this introduction: changes in...