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The degree and speed with which a market accurately incorporates information into prices.

Market Efficiency

The extent to which the price of an asset reflects all information available. Economists disagree on how efficient markets are. Followers of the efficient markets theory hold that the market efficiently deals with all information on a given security and reflects it in the price immediately, and that technical analysis, fundamental analysis, and/or any speculative investing based on those methods are useless. On the other hand, the primary observation of behavioral economics holds that investors (and people in general) make decisions on imprecise impressions and beliefs, rather than rational analysis, rendering markets somewhat inefficient to the extent that they are affected by people.


the relationship between the quantities of factor inputs (labour, materials, etc.) used by a firm and the quantity of output which it is able to produce using these inputs. Where a firm is able to produce the same output using fewer inputs or produce more output using the same quantity of inputs then it has improved its efficiency See PRODUCTIVITY.


the relationship between scarce FACTOR INPUTS and OUTPUTS of goods and services. This relationship can be measured in physical terms (TECHNOLOGICAL EFFICIENCY) or cost terms (ECONOMIC EFFICIENCY). The concept of efficiency is used as a criterion in judging how well MARKETS have allocated resources. See MARKET PERFORMANCE, RESOURCE ALLOCATION, ECONOMIZE.
References in periodicals archive ?
Energy Efficient HVAC, Lighting, Insulation and Glazing, Building Controls, and Energy Service Companies: Market Analysis and Forecasts
Contract notice: Purchase and maintenance of energy efficient computer equipment.
According to a new market research report of "Energy Efficient Motors Market (2013-2018): By Product (Synchronous (Reluctance, Permanent Magnet), Asynchronous (Squirrel Cage, Wound Rotor), DC Motor (Brushless, Brushed)); Type (IE3, IE2, IE1, NEMA); Application (Fans, Pump, HVAC, Compressed Air)" published by MarketsandMarkets is expected to grow at a CAGR of 19.
The highly coveted designation means that the iconic office tower is contributing to a healthier environment through the use of energy efficient products and practices approved by the U.
Some seemingly quiet black holes are actually efficient engines that emit jets of high-energy particles.
45M, a credit for the manufacture of efficient dishwashers, clothes washers and refrigerators manufactured in 2006 or 2007.
Equipment manufacturers agree that even as baler designs become more efficient with every successive model, there are many ways to keep energy costs down while keeping production up.
The law signed by Davis on Sunday requires all residential clothes washers to be at least as efficient as commercial washers starting in January 2007.
EarthCraft House is a partnership with the Greater Atlanta Home Builders association that trains builders to construct energy efficient, environmentally friendly, and more healthful homes.
Susan Douglas, NFRC's administrator, says that "windows have become much more efficient in recent years.
With expanded presence in the Asia Pacific region, Efficient will provide its local customer base with enhanced pre- and post-sales support for the company's SpeedStream family of DSL CPE.
LONDON -- Efficient Frontier, a leading digital marketing company, announced that premier UK retailer Marks & Spencer (M&S) has selected Efficient Frontier's bid management platform for its UK and international search marketing campaigns.

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