circuit breaker

circuit breaker
A procedure that temporarily halts trading on all US stock markets for one hour when the Dow Jones Industrial Average falls 250 points or more within a trading day. The pause is designed to allow time for the markets to absorb the news that precipitated the decline. Should the average fall another 150 points within the same day, trading would again be halted, this time for two hours. Exchange Handbook Glossary

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circuit breaker UK US noun [C]
► a piece of equipment that stops the flow of an electric current, used to prevent damage to the wires and equipment that are connected to it: »

If your internet access is out, it could be that a circuit breaker was tripped during a storm.

► STOCK MARKET a rule that temporarily stops trade on a stock market or closes it when prices go down to a particular level too quickly: »

The New York Stock Exchange instituted circuit breakers to reduce volatility and promote investor confidence.

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There are three circuit-breaker thresholds—10%, 20%, and 30%— calculated at the beginning of each quarter.


Financial and business terms. 2012.

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Look at other dictionaries:

  • circuit breaker — cir cuit break er, n. (Elec.) A device contained within an electrical circuit designed to interrupt the circuit when the current exceeds a preset value; it is sometimes called a {contact breaker}. Its function is to prevent fire or damage to the… …   The Collaborative International Dictionary of English

  • circuit breaker — circuit breakers also circuit breaker N COUNT A circuit breaker is a device which can stop the flow of electricity around a circuit by switching itself off if anything goes wrong. There is an internal circuit breaker to protect the instrument… …   English dictionary

  • circuit-breaker — ˈcircuit breaker [circuit breaker circuit breakers] noun a device that can automatically stop an electric current if it becomes dangerous …   Useful english dictionary

  • circuit-breaker — ► NOUN ▪ an automatic safety device for stopping the flow of current in an electric circuit …   English terms dictionary

  • circuit breaker — ☆ circuit breaker n. a switchlike safety device that automatically interrupts the flow of an electrical current in a circuit when it has become excessive …   English World dictionary

  • Circuit Breaker — ist: eine Überstromschutzeinrichtung eine Comicfigur von Marvel ein Pseudonym des Musikers Richie Hawtin eine Volatilitätsunterbrechung, ein Begriff aus dem Aktienwesen. Diese Seite ist eine …   Deutsch Wikipedia

  • Circuit Breaker —   [engl.], Überstromschalter …   Universal-Lexikon

  • circuit breaker — circuit .breaker n a piece of equipment that stops an electric current reaching a machine if the machine becomes dangerous …   Dictionary of contemporary English

  • circuit breaker — circuit ,breaker noun count a piece of equipment designed to stop an electric current automatically if it becomes too strong or dangerous …   Usage of the words and phrases in modern English

  • Circuit breaker — For other uses, see Circuit breaker (disambiguation). An air circuit breaker for low voltage (less than 1000 volts) power distribution switchgear …   Wikipedia

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