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Economic theory that asset prices fully reflect all available information
The efficient-market hypothesis (EMH) is a hypothesis in financial economics that states that asset prices reflect all available information. A direct
Efficient-market_hypothesis
Economic theory
adaptive market hypothesis, as proposed by Andrew Lo is an attempt to reconcile economic theories based on the efficient market hypothesis (which implies
Adaptive_market_hypothesis
American economist (born 1939)
his empirical work on portfolio theory, asset pricing, and the efficient-market hypothesis. He is Robert R. McCormick Distinguished Service Professor of
Eugene_Fama
Person or company involved in trading equity securities
extreme events ("black swans"). Market Memory: Contradicting the efficient market hypothesis, the authors claim that markets have memory, affecting future
Stock_trader
Buy/position trading
is a high correlation between the stock market and economic growth. According to the efficient-market hypothesis (EMH), if every security is fairly valued
Buy_and_hold
American Investor (born 1950)
2005. Consistently producing market-beating returns is considered to be unlikely according to the efficient market hypothesis. Miller once said, "As for
Bill_Miller_(investor)
1973 book by Burton Malkiel
cannot consistently outperform market averages. The book is frequently cited by those in favor of the efficient-market hypothesis. After the twelfth edition
A Random Walk Down Wall Street
A_Random_Walk_Down_Wall_Street
Buying or selling per prediction of market price trends
on the outlook for an aggregate market rather than for a particular financial asset. The efficient-market hypothesis is an assumption that asset prices
Market_timing
Economic paradox on market efficiency
Informationally Efficient Markets" (PDF). American Economic Review. 70 (3): 393–408. Lo, Andrew (2007). "Efficient market hypothesis". In Blume, Steven;
Grossman–Stiglitz_paradox
American Lithuanian economist (born 1946)
price-to-earnings ratio; challenging the Efficient Market Hypothesis; and warning years in advance of the stock market and housing bubble that would become
Robert_J._Shiller
Predicting future value of company stock
of a stock's future price could yield significant profit. The efficient market hypothesis suggests that stock prices reflect all currently available information
Stock_market_prediction
Representation of the capital asset pricing model
below (see figure above). Indeed, from the efficient market hypothesis, it follows that we cannot beat the market. Therefore, all assets should have a Treynor
Security_market_line
Place where stocks are traded
capital contributes to a stock's return growth. The efficient-market hypothesis (EMH) is a hypothesis in financial economics that states that asset prices
Stock_market
Topics referred to by the same term
antonym of closed market Prediction market Real estate market Stock market Wholesale marketing Efficient-market hypothesis, economic theory that asset prices
Market
The joint hypothesis problem is the problem that testing for market efficiency is difficult, or even impossible. Any attempts to test for market (in)efficiency
Joint_hypothesis_problem
of adaptive market hypothesis (AMH) proposed by Lo (2004, 2005, 2012). In contrast to efficient-market hypothesis (EMH), AMH regards markets as a constantly
Adaptive_Investment_Approach
Financial theory
The random walk hypothesis is a financial theory which states that the prices of financial assets, particularly those in the stock market, follow a random
Random_walk_hypothesis
Economics concepts
Markets Studies. 7 (1): 72–90. doi:10.1108/JCMS-12-2022-0046. hdl:10419/313308. ISSN 2514-4774. Investopedia ULC (2009). "Efficient Market Hypothesis
Financial_market_efficiency
Graphical aid to investment analysis
ratio will be below. Indeed, from the efficient market hypothesis it follows that it's impossible to beat the market. Therefore, all portfolios should have
Capital_market_line
Security analysis methodology
efficacy of technical analysis is disputed by the efficient-market hypothesis, which states that stock market prices are essentially unpredictable, and research
Technical_analysis
Term in finance
not warrant further increase. Such increase, according to the efficient-market hypothesis, is warranted only by changes in demand and supply or new information
Momentum_(finance)
American economist (born 1932)
Philosophical Society in 2001. He is a leading proponent of the efficient-market hypothesis, which contends that prices of publicly traded assets reflect
Burton_Malkiel
Investment approach in stock returns
consensus explanation, posing challenges to the efficient market hypothesis and random walk hypothesis. Due to the higher turnover and no clear risk-based
Factor_investing
In finance, the noisy market hypothesis stands in opposition to the efficient-market hypothesis by arguing that security prices do not always reflect
Noisy_market_hypothesis
Hypothesis that firms adjust financing decisions to exploit favourable market conditions
would be better able than the than "the market" in telling that there is mispricing (see Efficient-market hypothesis). Rather, it simply assumes that mispricing
Market_timing_hypothesis
How psychological biases shape investor behaviour and financial markets
is associated with the modern portfolio theory (MPT) and the efficient-market hypothesis (EMH). Modern portfolio theory is based on a stock or portfolio's
Behavioural_finance
American private investment firm
committee. DFA's investment strategy is based on application of the efficient market hypothesis. Dimensional was one of the earliest firms to offer passive investing
Dimensional_Fund_Advisors
Emotional states in investing
unpredictability and volatility of the stock market, and irrational market behavior inconsistent with the efficient-market hypothesis. Greed and fear relate to an old
Greed_and_fear
Concept in stock market analysis
movements, the Gann angle model contradicts the weakest form of the efficient-market hypothesis which states that past price movements cannot be used to forecast
Gann_angles
American asset manager & writer (born 1952)
Market Hypothesis". Liu, Guang; Yu, Chih-Ping; Shiu, Shan-Neng; Shih, I-Tung (January 2022). "The Efficient Market Hypothesis and the Fractal Market Hypothesis:
Edgar_E._Peters
Behavioral momentum on a large scale
one of the tenets of finance theory, the efficient-market hypothesis... Even the high priests of efficient-market theory have acknowledged [its impact].
The_Big_Mo
System of trading stocks based on recent performance
economists have trouble reconciling momentum with the efficient market hypothesis and random walk hypothesis. Two main hypotheses have been submitted to explain
Momentum_investing
Risk-adjusted measure of the so-called active return on an investment
return of CAPM and not to a market index, it would be more accurate to use the term of Jensen's alpha. Efficient market hypothesis (EMH) states that share
Alpha_(finance)
Financial market is predictability seems to be inconsistent with theories of asset prices
Relatedly, return predictability by itself does not disprove the efficient market hypothesis, as one needs to show predictability over and above that implied
Market_anomaly
Academic discipline concerned with the exchange of money
"correct", i.e. efficient, prices: the efficient-market hypothesis, or EMH. Thus, if prices of financial assets are (broadly) efficient, then deviations
Financial_economics
efficient-market hypothesis say that asset prices reflect all available information meaning that it is impossible to systematically beat the market by
Stock_market_cycle
Overview of finance and finance-related topics
Behavioral finance Dead cat bounce Efficient market hypothesis Market microstructure Stock market crash Stock market bubble January effect Mark Twain effect
Outline_of_finance
2008 edition of 1999 book by Paul Krugman
notions of restricted government spending, deregulation of markets and the efficient market hypothesis. Krugman offers policy recommendations for the prevention
The Return of Depression Economics and the Crisis of 2008
The_Return_of_Depression_Economics_and_the_Crisis_of_2008
1958 United States law
after the futures market for onions was introduced in the 1940s. Working cited this study as proof of the efficient-market hypothesis. In 1963, this theory
Onion_Futures_Act
Hypothesis in economics regarding true value of stocks by consensus
predicated on the efficient-market hypothesis (EMH). One of the first instances of the dumb agent theory in action was with the Policy Analysis Market (PAM); a
Dumb_agent_theory
Shares into which ownership of the corporation is divided
are willing to sell. In professional investment circles the efficient market hypothesis (EMH) continues to be popular, although this theory is controversial
Stock
Study of the development of economic thought
Behavior of Stock Market Prices, which found that stock market prices follow a random walk, proposing the Efficient Market Hypothesis, that randomness
History_of_economic_thought
Economic bubble in a stock market
as are bubbles that occur in experimental asset markets. According to the efficient-market hypothesis, this doesn't happen, and so any data is wrong.
Stock_market_bubble
Common pattern in financial analysis
the efficient-market hypothesis, which states that stock market prices are essentially unpredictable. The doji represents indecision in the market. A doji
Doji
Process of determining the price of an asset in the marketplace
traditional stock exchange-like markets. Arbitrage pricing theory (APT) Auction Efficient market hypothesis Initial public offering Market-based valuation Pricing
Price_discovery
American journalist (born 1964)
magazine. Fox's book, The Myth of the Rational Market (2009), traces the rise of the efficient-market hypothesis, and was a New York Times Notable Book of
Justin_Fox
a financial economist who helped to develop the efficient-market hypothesis and random walk hypothesis in asset pricing, a 2013 Nobel laureate in Economics
Fama–DFA_Prize
Mathematical analysis of gambling
chance, this is part of the efficient-market hypothesis. The underlying belief of the efficient market hypothesis is that the market will always make adjustments
Gambling and information theory
Gambling_and_information_theory
Situation in which financial assets suddenly lose a large part of their nominal value
cause recessions. Mainstream economic theories, such as the efficient market hypothesis, argue that asset prices generally reflect all available information
Financial_crisis
American investor
California, Los Angeles, and the author of papers supporting the efficient market hypothesis. Shaw earned a bachelor's degree summa cum laude from the University
David_E._Shaw
2000 book by Robert Shiller
have had a long-running dispute, with Shiller arguing Fama's efficient market hypothesis is seriously flawed. Nassim Nicholas Taleb, a retired Wall Street
Irrational_Exuberance_(book)
Stated value or face value of a financial instrument
price. This was far more important in unregulated equity markets than in the regulated markets that exist today,[when?] where stock issuance prices must
Par_value
2007 book by Nassim Nicholas Taleb
emblems and popular culture Cognitive bias Confirmation bias Efficient-market hypothesis Falsifiability Illusory correlation Raven paradox Sextus Empiricus
The Black Swan: The Impact of the Highly Improbable
The_Black_Swan:_The_Impact_of_the_Highly_Improbable
Market-weighted investing strategy
on autopilot." The theory underlying passive management, the efficient-market hypothesis, was developed at the Chicago Graduate School of Business in
Passive_management
Investment strategy for stocks
appears to invalidate the efficient-market hypothesis (EMH), which predicts that any such returns (e.g., from shorting the market) would be bid away by those
Sell_in_May
Form of corporate equity ownership
for various reasons delist some or all of their shares from the public market and common stock may then be converted to limited common stock, other stock
Common_stock
American academic
historian, economist and educator whose evangelizing of the efficient-market hypothesis to the public made him one of the country's best known popularizers
Peter_L._Bernstein
Award established in 1968 by Sveriges Riksbank
Fama's work is in support of efficient-market hypothesis meanwhile Robert Shiller's work is against the efficient-market hypothesis focusing in investors' irrational
Nobel Memorial Prize in Economic Sciences
Nobel_Memorial_Prize_in_Economic_Sciences
Mechanisms, processes and relations by which corporations are controlled and operated
problem is the efficient-market hypothesis (in finance, the efficient market hypothesis (EMH) asserts that financial markets are efficient), which suggests
Corporate_governance
Situation in which nothing can be improved without something else being hurt
maximization X-inefficiency Applications of these principles include: Efficient-market hypothesis Microeconomic reform Production theory basics Welfare economics
Economic_efficiency
Finance model linking expected return to systematic risk
systematic risk or market risk), often represented by the quantity beta (β) in the financial industry, as well as the expected return of the market and the expected
Capital_asset_pricing_model
American businessman
application of the efficient market hypothesis, and he helped pioneer what would later be called factor investing, targeting areas of the market that research
David_G._Booth
Financial estimation of potential market price
between the market price and fair value in any form of market, but especially with regard to tradable assets: The efficient-market hypothesis asserts that
Fair_value
Collective perception of a group of people
Crowdsourcing Dispersed knowledge Dollar voting Dunning–Kruger effect Efficient-market hypothesis Emergence Forecasting Delphi method Ensemble forecasting Human
Wisdom_of_the_crowd
School of economic thought
Chicago and is the originator of the efficient-market hypothesis, first defined in his 1965 article as a market where "at any point in time, the actual
Chicago_school_of_economics
Stock market trading theory
point, Dow theory agrees with one of the premises of the efficient-market hypothesis. Stock market averages must confirm each other In Dow's time, the US
Dow_theory
a test of the efficient-market hypothesis. Journal of Finance 32, 663-682 Banz, R.W., 1980. The relationships between return and market value of common
Style_drift
Investment approach where managers actively select and adjust portfolio holdings
investors do not agree with the strong and semi-strong forms of the efficient-market hypothesis (EMH). In the stronger forms of the EMH, all public information
Active_management
Random process independent of past history
The random walk was later seen as evidence in favor of the efficient-market hypothesis and random walk models were popular in the literature of the
Markov_chain
Anticipation that a future event or consequence is likely
for models such as the Efficient-market hypothesis which suggest that all information should be incorporated into the market, as well as for Modern portfolio
Expectation_(philosophy)
Economic system with both capitalist and socialist elements
critical of the strong version of "The efficient-market hypothesis", especially as it pertains to financial markets. "Mixed Economic System" Archived 1 May
Mixed_economy
Revealed preference, Samuelson condition, Social Welfare Function, Efficient-market hypothesis, Turnpike theory, Balassa–Samuelson effect, Stolper–Samuelson
List of Nobel Memorial Prize laureates in Economic Sciences
List_of_Nobel_Memorial_Prize_laureates_in_Economic_Sciences
Investment paradigm
has described value investing as rooted in a rejection of the efficient-market hypothesis (EMH). While the EMH proposes that securities are accurately
Value_investing
American economist
America)—beat the market, again contradicting the efficient market hypothesis. In another study, Smith found that the U. S. stock market has done better
Gary_Smith_(economist)
Theorem in political science
supports the Median Voter Theorem. Arrow's impossibility theorem Efficient-market hypothesis Highest median voting rules Lesser of two evils principle Ranked
Median_voter_theorem
1984 article by Warren Buffett
a University of Rochester professor and a proponent of the efficient-market hypothesis, and Buffett, who was known to oppose it. Jensen proposed a thought
The Superinvestors of Graham-and-Doddsville
The_Superinvestors_of_Graham-and-Doddsville
Defunct American hedge fund
S2CID 220355463. Lowenstein 2000, p. 191 Quiggin, John (2010). "The Efficient Market Hypothesis". Zombie Economics: How Dead Ideas Still Walk among Us. New York:
Long-Term_Capital_Management
American investor and philanthropist (born 1930)
Superinvestors of Graham-and-Doddsville", Buffett rebutted the academic efficient-market hypothesis, that beating the S&P 500 was "pure chance", by highlighting
Warren_Buffett
Buying and selling real estate for profit
maximize returns.[citation needed] Real estate markets in most countries are not as organized or efficient as markets for other, more liquid investment instruments
Real_estate_investing
2004 book by James Surowiecki
Crowdsourcing Dumb agent theory Efficient-market hypothesis Global brain Groupthink The Good Judgment Project Iowa Electronic Markets Open-source governance Problem
The_Wisdom_of_Crowds
American expression about belief and existence
Peter Pan." (Database: NewsBank) Rall, Eric (October 14, 2010). "Efficient Market Hypothesis and the Tinkerbell Effect". Archived from the original on October
Tinkerbell_effect
Subject inspired by evolutionary biology
Andrew Lo proposed the adaptive market hypothesis—an extension of the efficient market hypothesis that treats financial market agents as "species" who exist
Evolutionary_economics
Market structure in which firms are price takers for a homogeneous product
both allocative efficiency and productive efficiency: Such markets are allocatively efficient, as output will always occur where marginal cost is equal
Perfect_competition
French-American mathematician (1924–2010)
interview on the subject of the financial markets which includes his critique of the "efficient market" hypothesis. Taylor, Richard (2011). "Obituaries: Benoit
Benoit_Mandelbrot
Investors who invest professionally and as their main occupation in the stock market
Lending credence to doubts about active investors' ability to 'beat the market', passive index funds have gained traction with the rise of passive investors:
Institutional_investor
Book by Richard Bookstaber
'normal accidents' that have corollaries in the financial markets. The efficient market hypothesis comes under attack in this book using biological and evolutionary
A_Demon_of_Our_Own_Design
Measure of the long-range dependence of a time series
Gemunu H. Gunaratne (2008) "Martingales, Detrending Data, and the Efficient Market Hypothesis", Physica, A37, 202, Open access preprint: arXiv:0710.2583 Bariviera
Hurst_exponent
Financial ratio comparing stock price to company book value
Stocks in Relation to Their Price/Earnings Ratios: A Test of the Efficient Market Hypothesis", Journal of Finance 32(3), June, 1977. Institute, Brandes, Value
P/B_ratio
2001 book by Steve Keen
critiques is that macroeconomic models or theories such as the efficient-market hypothesis rely on the assumption that the economy can be viewed as being
Debunking_Economics
Investments other than stocks, bonds and cash
offices). Only available in the UK, SEIS funds and EIS funds present a tax-efficient way of investing in early-stage ventures. These work much like venture
Alternative_investment
French economist (born 1962)
who reject the positions of mainstream economics, such as the efficient-market hypothesis, etc. An early observer of the subprime mortgage crisis, he proposed
Frédéric_Lordon
Hypothesis that strict environmental regulations can spur innovation
According to the Porter hypothesis, strict environmental regulations can induce efficiency and encourage innovations that help improve commercial competitiveness
Porter_hypothesis
Type of mutual fund or exchange-traded fund
Economists cite the efficient-market hypothesis (EMH) as the fundamental premise that justifies the creation of the index funds. The hypothesis implies that
Index_fund
Stock investment strategy based on Dow Jones Industrial index
questions if the method can truly contradict the random walk hypothesis and efficient market hypothesis after transaction costs. [citation needed][pages needed]
Dogs_of_the_Dow
British economist
1995) his work focused on foreign exchange markets, specifically analysing the efficient-market hypothesis. To help with this research, Goodhart (with
Charles_Goodhart
French pioneer in mathematical economics (1870-1946)
Fama's efficient-market hypothesis, which is very closely related, as the idea of a random walk is suited to predict the random future in a stock market where
Louis_Bachelier
American investor
prevailing investing theories in academia, the random walk hypothesis and the efficient market hypothesis, were contradictory. The concepts taught by professors
Peter_Lynch
Phenomenon in economics and accounting
that market participants do not immediately incorporate all information from earnings announcements. This finding challenged the efficient market hypothesis
Post–earnings-announcement drift
Post–earnings-announcement_drift
17th-century economic bubble in the Netherlands
into tulip mania since then, especially by proponents of the efficient-market hypothesis, suggests that his story was incomplete and inaccurate. In her
Tulip_mania
Production, distribution and consumption of goods and services; distinct from finance
Financial markets according to the efficient-market hypothesis are deemed to be efficient based on all available information. The market interest rate
Real_economy
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
Male
French
French form of Roman Latin Marcellus, MARCEL means "defense" or "of the sea."
Surname or Lastname
English
English : topographic name for someone who lived by a boundary (see Mark 2). It is notable that early examples of the surname tend to occur near borders, for example on the Kent-Sussex boundary.English : possibly an occupational name from an agent derivative of Middle English mark(en) ‘to put a mark on’, although it is not clear what the exact nature of the work of such a ‘marker’ would be.English : relatively late development of Mercer. There is one family in Clitheroe, Lancashire, who spelled their name Mercer or Marcer in the 16th century, but Marker in the 17th.Jewish (Ashkenazic) : occupational name from Yiddish marker ‘servant’.German : status name for someone who lived on an area of land that was marked off from the village land or woodland, Middle High German merkære.Danish : from a short form of the Germanic personal name Markward.
Female
Welsh
Welsh form of Greek Margarites, MARGED means "pearl."
Boy/Male
French
Of Mars; the god of war.
Boy/Male
American, Basque, Chinese, French, German
Of Mars; The God of War
Surname or Lastname
English (Cornwall)
English (Cornwall) : habitational name from Mankea in Cornwall, named with Corinsh men ‘stone’ + kee ‘bank’, ‘hedge’.Americanized form of German Manke.
Girl/Female
Arabic
Efficient
Female
Hungarian
Hungarian and Scandinavian form of Greek Margarites, MARGIT means "pearl."
Boy/Male
Indian, Punjabi, Sikh
Intelligent; Efficient
Boy/Male
Tamil
Rahulraj | ராஹà¯à®²à®°à®¾à®œ
Efficient, Capable
Rahulraj | ராஹà¯à®²à®°à®¾à®œ
Male
English
English surname transferred to unisex forename use, GARNET means "garnet (the gem)," derived from a Middle English altered form of Old French (pome) grenate, "fruit full of seeds," the same source from which came the name of the precious stone.Â
Male
English
English byname for a quarrelsome person. It became a surname, then transferred to a forename, derived from Middle English barat, a derivative of barater, BARRET means "to haggle," hence "haggler."
Female
English
Pet form of French Marguerite, MARGOT means "pearl."
Boy/Male
Hindu
Efficient, Capable
Surname or Lastname
English
English : topographic name for someone who lived by a market, Middle English market.
Girl/Female
Gujarati, Indian
Efficient
Surname or Lastname
English
English : variant spelling of Marks.
Male
English
 Variant spelling of English Garrett, GARRET means "spear ruler."
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Agile; Efficient
Boy/Male
Indian, Sanskrit
Skillful; Efficient
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
Boy/Male
Tamil
Girl/Female
Tamil
Quick, Swift
Boy/Male
Muslim
Advocate. Mediator.
Girl/Female
Indian, Telugu
Wise Lady
Girl/Female
Australian, Christian, Danish, French, German, Greek, Swedish
Woman from Lydia; Diminutive of Lydia
Boy/Male
Tamil
Like ears of elephant
Boy/Male
Hindu, Indian
An Engineer
Girl/Female
Australian, Christian, French, German, Greek
Pale; Green Buds
Surname or Lastname
English and Scottish
English and Scottish : derogatory nickname from a derivative of bald ‘bald-headed’ (see Bald 2).
Surname or Lastname
Irish
Irish : variant spelling of Hines.English : patronymic from Hine.Possibly an Americanized spelling of German Heins or Heinz.
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
EFFICIENT MARKET-HYPOTHESIS
a.
Not efficient; not producing the effect intended or desired; inefficacious; as, inefficient means or measures.
n.
An efficient cause; a prime mover.
n.
The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
v. t.
To expose for sale in a market; to traffic in; to sell in a market, and in an extended sense, to sell in any manner; as, most of the farmes have marketed their crops.
v. i.
To deal in a market; to buy or sell; to make bargains for provisions or goods.
n.
Alt. of Efficiency
n.
An opportunity for selling anything; demand, as shown by price offered or obtainable; a town, region, or country, where the demand exists; as, to find a market for one's wares; there is no market for woolen cloths in that region; India is a market for English goods.
n.
Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
a.
Making or doing throughly; efficient; effectual.
n.
The privelege granted to a town of having a public market.
n.
One who attends a market to buy or sell; one who carries goods to market.
n.
A public place (as an open space in a town) or a large building, where a market is held; a market place or market house; esp., a place where provisions are sold.
a.
Wanting, to make up completeness; wanting, as regards a requirement; not sufficient; inadequate; defective; imperfect; incomplete; lacking; as, deficient parts; deficient estate; deficient strength; deficient in judgment.
a.
Designated or distinguished by, or as by, a mark; hence; noticeable; conspicuous; as, a marked card; a marked coin; a marked instance.
a.
Incapable of, or indisposed to, effective action; habitually slack or remiss; effecting little or nothing; as, inefficient workmen; an inefficient administrator.
a.
Self-sufficient; self-satisfied; content.
n.
Exchange, or purchase and sale; traffic; as, a dull market; a slow market.
imp. & p. p.
of Market
a.
Equal to the end proposed; adequate to wants; enough; ample; competent; as, provision sufficient for the family; an army sufficient to defend the country.
n.
The price for which a thing is sold in a market; market price. Hence: Value; worth.