In semantic terms, to take risks in an enterprise context can, therefore, to be atrelado to the ousadia in businesses. In financial terms, to take risks must be atrelado to the expectation of returns adds. The word risk, in accordance with the Aurlio dictionary, involves the danger possibility. According to modern theory of finances, risk represents a measure of variability of the possible returns generated for an asset, as the concept established for Markowitz (1959). According to Kimura (2008), to atrelar risk to the ousadia it provides a more qualitative and subjective boarding, however it is important to stand out that a risk analysis must also propitiate a quantitative mensurao of the loss potential. 2,3 Gitman return (1997) defines return on investment as the total of profits or decurrent damages of the investment during one determined period of time. According to Orsi, to eliminate all the risks, in first place, can not be possible e, in according to place, would limit the profit potential considerably.
After all, only through the installation of risks it is that the companies can wait bigger returns that one taxes free of risk. However, it is important to detach that the risks that a company must assume have of being compatible with its strategy, its expertise and with the market where it acts. For Securato (1999), the companies must develop expertise in daring in rational way, that is, they must take risks that generate greaters return expectations. Thus, models of control of risks must guide the elimination of extreme risks that do not generate returns adjusted for the adequate risks. 2,4 Options In accordance with the So Paulo Stock Exchange (2009), an option contract, is a contract between two parts, the bearer and the thrower. An option confers to the bearer the right to buy the action object, at the cost of exercise, to any instant until the date of the expiration, in the case of purchase option and of the American type and in the expiration of the European style, obeyed the rules of the stock exchange.