Real estate belongs to the alternative investments asset class. Real estate investment involves the purchase of real property (land, buildings, housing, etc.) to generate income or other investment purposes, rather than for residence. It is considered a riskier investment than traditional asset classes because it offers limited liquidity. Each property is unique and is not directly interchangeable on an exchange like stocks and bonds are. Depending on the condition of the market, the sale of a property may not be smooth,or generate the desired price.