Real estate investing involves the purchase, ownership, management, rental and/or sale of real estate for profit. Improvement of realty property as part of a real estate investment strategy is generally considered to be a sub-specialty of real estate investing called real estate development. Real estate is an asset form with limited liquidity relative to other investments, it is also capital intensive (although capital may be gained through mortgage leverage) and is highly cash flow dependent. If these factors are not well understood and managed by the investor, real estate becomes a risky investment. The primary cause of investment failure for real estate is that the investor goes into negative cash flow for a period of time that is not sustainable, often forcing them to resell the property at a loss or go into insolvency. A similar practice known as flipping is another reason for failure as the nature of the investment is often associated with short term profit with less effort.
Real estate markets in most countries are not as organized or efficient as markets for other, more liquid investment instruments. Individual properties are unique to themselves and not directly interchangeable, which presents a major challenge to an investor seeking to evaluate prices and investment opportunities. For this reason, locating properties in which to invest can involve substantial work and competition among investors to purchase individual properties may be highly variable depending on knowledge of availability. Information asymmetries are commonplace in real estate markets. This increases transactional risk, but also provides many opportunities for investors to obtain properties at bargain prices. Real estate entrepreneurs typically use a variety of appraisal techniques to determine the value of properties prior to purchase.