A real estate portfolio is a collection of properties that you hold, for the purpose of growing your money. This is accomplished by collecting rental income, through the property appreciating in value, or a combination of the two. Note that real estate investment does not require you to have full ownership of a property. The advent of newer models of investing has made it possible to start investing in real estate simply by buying a stake in a property, or by owning shares in an investment fund. Real estate portfolios may be constructed in several ways, ranging from residential real estate, to commercial properties and mixed-use developments. Some real estate portfolios are categorised according to different parameters, such as geographic location, property type, or market value.