Ownership is generally not a goal of speculators, while investors often look to build the number of assets in their portfolios over time. A new vision of the competitive environment and of the global trends can bring to invest in surprising directions. In others, the decision will be based on more strategic and vital arguments. Sargent Paul Krugman N. Investment banks also provide guidance to issuers regarding the issue and placement of stock, such as with an IPO or rights offering.