Complete Guide To Investment Companies, Funds And REITs

AAA

Introduction - Efficient Market Hypothesis (EMH)

The efficient market hypothesis (EMH), created in the 1970s by Eugene Fama, is an investment theory that states it is impossible to "beat the market," because stock market efficiency causes existing share prices to always incorporate and reflect all relevant information. According to the EMH, stocks always trade at their fair value on stock exchanges, making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such, it should be impossible to outperform the overall market through expert stock selection or market timing. It states that the only way an investor can possibly obtain higher returns is by purchasing riskier investments.

Although it is a cornerstone of modern financial theory, the EMH is highly controversial and often disputed. Believers argue it is pointless to search for undervalued stocks or to try to predict trends in the market through either fundamental or technical analysis.

While academics point to a large body of evidence in support of EMH, an equal amount of dissension also exists. For example, investors such as Warren Buffett have consistently beaten the market over long periods of time, which should be impossible, according to the EMH. Detractors of the EMH also point to events, such as the 1987 stock market crash when the Dow Jones Industrial Average (DJIA) fell by over 20% in a single day, as evidence that stock prices can seriously deviate from their fair values.

Relevant Articles:

Modern Portfolio Theory (MPT)
Related Articles
  1. Mutual Funds & ETFs

    How Mutual Fund Companies Make Money

    Read about the many different kinds of fees and sales charges mutual fund companies can use to generate revenue from those who invest in their shares.
  2. Investing Basics

    The Lipper Rating System Explained

    Take a closer look at how Lipper Inc., a subsidiary of Thomson Reuters, determines the ratings for mutual funds in its Lipper Rating System.
  3. Mutual Funds & ETFs

    3 PIMCO Funds Rated 5 Stars by Morningstar

    Learn about three fixed income mutual funds managed by Pacific Investment Management Company (PIMCO) that have received five-star overall ratings from Morningstar.
  4. Mutual Funds & ETFs

    3 Invesco Funds Rated 5 Stars by Morningstar

    Learn about the top three mutual funds administered and managed by Invesco Ltd. that have received a five-star overall rating from Morningstar.
  5. Mutual Funds & ETFs

    The Top 4 Russell Funds for Retirement Diversification in 2016

    Discover four mutual funds administered and managed by Russell Investments that would add diversification benefits to a retirement portfolio.
  6. Mutual Funds & ETFs

    The 3 Best American Funds for the Income Seeker in 2016

    Learn about American Funds' mutual fund offerings, their past performance compared to peers and three American funds to consider for income investors.
  7. Mutual Funds & ETFs

    The Top 5 Large Cap Core ETFs for 2016 (VUG, SPLV)

    Look out for these five ETFs in 2016, and learn why investors should closely watch how the Federal Reserve moves heading into the new year.
  8. Mutual Funds & ETFs

    5 Low Fee Lord Abbett Mutual Funds

    Learn about five low expense ratio Lord Abbett mutual funds and the key characteristics about each mutual fund's top holdings, returns and total assets.
  9. Economics

    India: Why it Might Pay to Be Bullish Right Now

    Many investors are bullish on India for all the right reasons. Does it present an investing opportunity?
  10. Fundamental Analysis

    The 3 Best Investments When Bull Markets Slow Down

    Find out why no bull market lasts forever, and why investors should shift their assets away from growth and toward dividends when stocks slow down.
RELATED TERMS
  1. PIPE Deal

    Signifying "Private Investment in Public Equity," a PIPE deal ...
  2. Collateralized Mortgage Obligation ...

    A type of mortgage-backed security in which principal repayments ...
  3. Consumer Staples

    Essential products such as food, beverages, tobacco and household ...
  4. Hedge

    Making an investment to reduce the risk of adverse price movements ...
  5. Benchmark

    A standard against which the performance of a security, mutual ...
  6. Private Equity Real Estate

    A Definition of "Private Equity Real Estate" and how it applies ...
RELATED FAQS
  1. What is a derivative?

    A derivative is a contract between two or more parties whose value is based on an agreed-upon underlying financial asset, ... Read Full Answer >>
  2. What is securitization?

    Securitization is the process of taking an illiquid asset, or group of assets, and through financial engineering, transforming ... Read Full Answer >>
  3. Are target-date retirement funds good investments?

    The main benefit of target-date retirement funds is convenience. If you really don't want to bother with your retirement ... Read Full Answer >>
  4. Do mutual funds require a demat account?

    A dematerialized account enables electronic transfer of funds. The account is used so an investor does not need to hold the ... Read Full Answer >>
  5. Can hedge funds trade penny stocks?

    Hedge funds can trade penny stocks. In fact, hedge funds can trade in just about any type of security, including medium- ... Read Full Answer >>
  6. How liquid are Vanguard mutual funds?

    The Vanguard mutual fund family is one of the largest and most well-recognized fund family in the financial industry. Its ... Read Full Answer >>
Hot Definitions
  1. Presidential Election Cycle (Theory)

    A theory developed by Yale Hirsch that states that U.S. stock markets are weakest in the year following the election of a ...
  2. Super Bowl Indicator

    An indicator based on the belief that a Super Bowl win for a team from the old AFL (AFC division) foretells a decline in ...
  3. Flight To Quality

    The action of investors moving their capital away from riskier investments to the safest possible investment vehicles. This ...
  4. Discouraged Worker

    A person who is eligible for employment and is able to work, but is currently unemployed and has not attempted to find employment ...
  5. Ponzimonium

    After Bernard Madoff's $65 billion Ponzi scheme was revealed, many new (smaller-scale) Ponzi schemers became exposed. Ponzimonium ...
  6. Quarterly Earnings Report

    A quarterly filing made by public companies to report their performance. Included in earnings reports are items such as net ...
Trading Center