Once the American humorist Will Rogers (1879 - 1935) had remarked "I'm more concerned about the return of my money than with the return on my money". And, he was certainly correct. We all attempt to enhance our wealth and it is an intuitive and natural instinct of human beings. However, we should do so in a fashion and style that do not put our wealth, savings, and investments to undue and undesirable risk. Perhaps, there is always some element of risk and speculation inherent in most of investments, yet with a prudent and informed approach such risks may be contained to a large extent (though not always). Over a period of time, the desire of management of finance has resulted into many styles of personal investing (as also general and other investing), and these styles have given rise to a number of theories of investments. These Investment Theories try to explain and support particular type of Investment Strategies. Some of the major and popular Investment Theories are:

  1. Bernstein's Psychology of Successful Investing
  2. Top Down Investing
  3. Bottom Up Investing
  4. Buy the Rumour & Sell the Fact
  5. Castle-in-the-Air Theory
  6. Constant Stock-Bond Ratio Theory
  7. Cybernetic Analysis
  8. Diversification Theory
  9. Efficient Market Theory
  10. Firm Foundation Theory
  11. Life Cycle Investment Theory
  12. Markowitz Portfolio Selection Theory
  13. Selling Theories
  14. The 10 Percent Rule
  15. The Windbag Theory

Few words about these theories of Investments, and related concepts and ideas are briefly outlined below. The relevant details pertaining to these theories are also presented in separate write-ups relating to these theories.


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