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Used to characterize a group of securities that are similar with respect to maturity, type, rating, industry, and/or coupon.


A set of securities or individual companies that are similar to each other. For example, all automotive companies in the United States are said to belong to the American automotive sector. See also: Industry.


A group of securities (such as airline stocks) that share certain common characteristics. Stocks that are particularly interest-sensitive are considered a sector.


A sector is a segment of the economy that includes companies providing the same types of products or services.

For example, the utility sector provides electric power, natural gas, water, or a combination of these services. This sector may also include companies who produce power and those that trade it.

Companies within a sector tend to be reasonably consistent in their average earnings per share, price/earnings ratios (P/Es), and other fundamentals. But fundamentals may differ substantially from one sector to another. For example, some sectors are cyclical, rising and falling with changes in the economy while others are defensive, maintaining their strength despite economic ups and downs.

Since there's no official list of sectors, there can be confusion about how many sectors there are, what they're called, and what companies are included in them. For example, transportation is sometimes a standalone sector and sometimes included as part of the industrial sector.

Sector indexes, some of which are broad while others are very narrow, track many of the major sectors of the economy.


a part of the economy that has certain common characteristics that enable it to be separated from other parts of the economy for analytical or policy purposes. A broad division may be made, for example, between economic activities undertaken by the state (the PUBLIC SECTOR) and those that are undertaken by private individuals and businesses (the PRIVATE SECTOR). The private sector, in turn, may be subdivided into the PERSONAL SECTOR (private individuals and households), the CORPORATE SECTOR (businesses supplying goods and services) and the FINANCIAL SECTOR (businesses providing financial services).
References in periodicals archive ?
Warren Zhao, CEO of Tri-Tech Holding said, "We are delighted that Tri-Tech continues its steady performance in China's wastewater treatment sector following several international water and wastewater projects awarded in previous months.
More than 24,000 Victorians needing treatment for alcohol and drug dependency will receive better coordinated and streamlined services as a result of significant reform of the community-based treatment sector announced today by the Minister for Mental Health Mary Wooldridge.
It has been estimated that total spending on the water and wastewater treatment sector is AU$6.
Being the leading player in the solid waste treatment sector in the United States, WM has outstanding management team, rich experience and leading technology and is our best partner in the development and expansion of our solid waste treatment business.
With the governments' current drive to develop centralized water and water treatment plants, the focus is slowly shifting from new urban projects in the water treatment sector.
This is a game-changing innovation in the pursuit of energy neutrality in the municipal wastewater treatment sector that also addresses the need for facilities to upgrade for nutrient removal and capacity expansion within an existing plant footprint.
Special focus is placed on how new products and technologies will affect current market leaders in the MS treatment sector.
The recent revival of the Egyptian economy as influencing the return of investments on dormant infrastructure projects including the waste water treatment sector.
is one of the fastest growing companies in the substance abuse addiction treatment sector and has developed a highly effective addiction treatment program that utilizes a biodegradable implant of Naltrexone as one component of the program.
Dow Water and Process Solutions aims to achieve advancement in business performance while also enhancing human progress to make a global difference, while contributing on a local level to advancements in the water treatment sector.
Dr Mazen Bachir, the managing director, Passavant Energy and Environment, said: "The water and wastewater treatment sector is currently witnessing a significant growth in India with the rise in demand for highly advanced wastewater treatment and waste to energy technologies.

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