Semi-Strong Form Efficiency

AAA

DEFINITION of 'Semi-Strong Form Efficiency'

A class of EMH (Efficient Market Hypothesis) that implies all public information is calculated into a stock's current share price. Meaning that neither fundamental nor technical analysis can be used to achieve superior gains.

INVESTOPEDIA EXPLAINS 'Semi-Strong Form Efficiency'

This class of EMH suggests that only information that is not publicly available can benefit investors seeking to earn abnormal returns on investments. All other information is accounted for in the stocks price and, regardless of the amount of fundamental and technical analysis one performs, above normal returns will not be had.

RELATED TERMS
  1. Strong Form Efficiency

    The strongest version of market efficiency. It states all information ...
  2. Weak Form Efficiency

    One of the different degrees of efficient market hypothesis (EMH) ...
  3. Technical Analysis

    A method of evaluating securities by analyzing statistics generated ...
  4. Random Walk Theory

    The theory that stock price changes have the same distribution ...
  5. Efficient Market Hypothesis - EMH

    An investment theory that states it is impossible to "beat the ...
  6. Fundamental Analysis

    A method of evaluating a security that entails attempting to ...
RELATED FAQS
  1. What does the Efficient Market Hypothesis have to say about fundamental analysis?

    The efficient market hypothesis (EMH) is at odds with fundamental analysis because of its assumptions about the availability ... Read Full Answer >>
  2. What are the differences between weak, strong and semi-strong versions of the Efficient ...

    Though the efficient market hypothesis as a whole theorizes that the market is generally efficient, the theory is offered ... Read Full Answer >>
  3. What assumptions are made when conducting a t-test?

    The common assumptions made when doing a t-test include those regarding the scale of measurement, random sampling, normality ... Read Full Answer >>
  4. What is the utility function and how is it calculated?

    In economics, utility function is an important concept that measures preferences over a set of goods and services. Utility ... Read Full Answer >>
  5. How are double exponential moving averages applied in technical analysis?

    Double exponential moving averages (DEMAS) are commonly used in technical analysis like any other moving average indicator ... Read Full Answer >>
  6. How do you know where on the oscillator you should make a purchase or sale?

    Common oscillator readings to consider making a buy or sale are below 20 or above 80, respectively. More aggressive investors ... Read Full Answer >>
Related Articles
  1. Active Trading Fundamentals

    Understanding Investor Behavior

    Discover how some strange human tendencies can play out in the market, posing the question: are we really rational?
  2. Active Trading

    What Is Market Efficiency?

    The efficient market hypothesis (EMH) suggests that stock prices fully reflect all available information in the market. Is this possible?
  3. Investing Basics

    Invest Without Stress

    Have anxiety? Don't worry. We have your worry-free investing guide right here.
  4. Active Trading Fundamentals

    Efficient Market Hypothesis: Is The Stock Market Efficient?

    Deciding whether it's possible to attain above-average returns requires an understanding of EMH.
  5. Active Trading Fundamentals

    Mad Money ... Mad Market?

    Jim Cramer's spirited recommendations are a case study in irrational market behavior.
  6. Fundamental Analysis

    Explaining Price Targets

    A price target is what an investment analyst projects a security’s future price to be.
  7. Fundamental Analysis

    Present Value Interest Factor of Annuity (PVIFA)

    PVIFA can be used to calculate the present value of a series of annuities by considering cash flows and depreciation.
  8. Economics

    What's a Centrally Planned Economy?

    A centrally planned economy is one where the government controls the country’s supply and demand of goods and services.
  9. Economics

    What are Barriers to Entry?

    A barrier to entry is any obstacle that restricts or impedes a company’s efforts to enter an industry.
  10. Chart Advisor

    ChartAdvisor for July 30 2015

    Weekly technical summary of the major U.S. indexes.

You May Also Like

Hot Definitions
  1. Bogey

    A buzzword that refers to a benchmark used to evaluate a fund's performance. The benchmark is an index that reflects the ...
  2. Xetra

    An all-electronic trading system based in Frankfurt, Germany. Launched in 1997 and operated by the Deutsche Börse, the Xetra ...
  3. Nuncupative Will

    A verbal will that must have two witnesses and can only deal with the distribution of personal property. A nuncupative will ...
  4. OsMA

    An abbreviation for Oscillator - Moving Average. OsMA is used in technical analysis to represent the variance between an ...
  5. Investopedia

    One of the best-known sources of financial information on the internet. Investopedia is a resource for investors, consumers ...
  6. Unfair Claims Practice

    The improper avoidance of a claim by an insurer or an attempt to reduce the size of the claim. By engaging in unfair claims ...
Trading Center
×

You are using adblocking software

Want access to all of Investopedia? Add us to your “whitelist”
so you'll never miss a feature!