A market participant may either be coming from the supply side, hence supplying excess money in favor of the demand side; or coming from the demand side, hence demanding excess money in favor of the supply side. This equation originated from Keynesian advocates. The theory explains that a given market may have excess cash; hence the supplier of funds may lend it; and those in need of cash may borrow the funds supplied. Hence, the equation: aggregate savings equals aggregate investments. The demand side consists of: those in need of cash flows ; those in need of interim financing ; those in need of long-term funds for special projects. The supply side consists of: those who have aggregate savings that can be used in favor of demand side. The origin of the savings can be local savings or foreign savings. So much pensions or savings can be invested for school buildings; orphanages; or for road network or port development. The earnings go to owner and the margin goes to the banks. When the principal and interest are added up, it will reflect the amount paid for the user of the funds. Thus, an interest percentage for the cost of using the funds.
Speculation, in the narrow sense of financial speculation, involves the buying, holding, selling, and short-selling of stocks, bonds, commodities, currencies, collectibles, real estate, derivatives or any valuable financial instrument to profit from fluctuations in its price as opposed to buying it for use or for income via methods such as dividends or interest. Speculation or agiotage represents one of three market roles in western financial markets, distinct from hedging, long term investing and arbitrage. Speculators in an asset may have no intention to have long term exposure to that asset.
A retail investor is an individual investor possessing shares of a given security. Retail investors can be further divided into two categories of share ownership:
A Beneficial Shareholder is a retail investor who holds shares of their securities in the account of a bank or broker, also known as "in Street Name". The broker is in possession of the securities on behalf of the underlying shareholder.
A Registered Shareholder is a retail investor who holds shares of their securities directly through the issuer or its transfer agent. Many registered shareholders have physical copies of their stock certificates.
In the United States, as of 2005 about 57 million households owned stocks, and in total, individual investors owned 26% of equities.