Various finance theories, evolved at different points of time, mainly underline the fundamental aspects of finance. The role of finance in the market has been explained by numerous economists with the help of different finance theories. The prime concept of finance theory is to study the various ways by which a business or an individual raises money. Allocating money into projects while considering the risk factors attached to them also fall under the canopy of finance theory fundamentals.
The concept of finance may also be integrated with the concepts such as: study of money and other assets, managing and profiling project risks, control and management of assets and also the science of managing money. In simple understanding, 'financing' also means provision and allocation of fund for a particular business module or project.
There are a number of finance theories that offer separate approaches to the finance hypotheses. Some of the major and popular finance theories of the world are: arbitrage pricing theory, rational choice theory, prospect theory, cumulative prospect theory, Monte Carlo option model, binomial options pricing model, Gordon model, international Fisher effect, Black model, legal origins theory and many others.
The Arbitrage Pricing Theory for example talks about the general theory of asset pricing. The proper asset pricing is necessary for the proper pricing of shares. The Arbitrage Pricing Theory states that the return that is expected from a financial asset can be presented as a linear function of various theoretical market indices and macro-economic factors. Here it is assumed that the factors considered are sensitive to changes and that is represented by a factor-specific beta coefficient.
The Prospect theory of finance, on the other hand, discusses the alternatives involving risks. It takes into consideration the alternatives that come with uncertain outcomes. The model is descriptive by nature and it tries to represent the real-life choices but not optimal decisions.
Modern portfolio theory (MPT) is another finance theory that proposes how the rational investors should use diversification in order to optimize their portfolios. It also discusses how a risky asset should be priced.
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