The Shanghai inventory change in China.

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From Wall Road to Asia, the current sell-off in international inventory markets has triggered buying and selling halts in a number of inventory exchanges — an prevalence that might develop into more and more widespread as traders worry the impact of the coronavirus outbreak.

Within the U.S., buying and selling was quickly stopped twice this week after the S&P 500 Index fell 7% — triggering the primary threshold for a “circuit breaker,” geared toward stopping markets from wild swings.

In Asia, circuit breakers had been additionally triggered in lots of exchanges together with India, Japan, South KoreaIndonesia, Thailand and the Philippines this week.

Circuit breakers are measures carried out by exchanges once they think about worth actions to be overly unstable. They’ll take the type of a buying and selling suspension or limiting shopping for and promoting of securities inside a particular worth vary. 

Jurisdictions and inventory exchanges have their very own guidelines for what circuit breakers entail, when do they kick in, and for the way lengthy they’re in place.

Listed below are what circuit breakers at a few of Asia’s most important inventory exchanges are like.

Better China

Each the Shanghai and Shenzhen inventory exchanges will droop buying and selling for 15 minutes when the CSI 300 Index rises or falls by 5% or extra from its earlier shut for the primary time.

If the index rises or falls by 7% or extra from the earlier shut, buying and selling will likely be halted for the day.

Merchandise which can be topic to circuit breakers embody shares, mutual funds and sure bonds.

Over on the Hong Kong inventory change, the circuit breaker at present applies solely to the constituent shares of the Hang Seng Index and the Grasp Seng China Enterprise Index.

In Hong Kong, the circuit breaker is predicated on a “reference worth” — or the final traded worth 5 minutes in the past. A cooling-off interval is triggered if the value of a inventory goes above or under 10% from the reference worth. In the course of the cooling-off interval, which lasts for five minutes, buying and selling is allowed solely inside a hard and fast worth band of 10% above or under the reference worth.

Ranging from Could, the Hong Kong inventory change will develop its circuit breaker to cowl one other 500 or so shares, and the reference worth that can set off a cooling interval may even be tiered in response to market capitalization.


The Japan Exchange Group, the corporate that manages the nation’s most important exchanges, apply buying and selling halts to all futures and choices contracts, in addition to spinoff merchandise referring to futures and choices.

Every product has its personal “worth restrict vary” that can journey the circuit breakers, a few of which will likely be revised each few months utilizing a components that takes under consideration previous worth tendencies.

Buying and selling will likely be suspended for 10 minutes when that restrict vary is breached.

South Korea

In South Korean markets, buying and selling of all listed securities (excluding debt securities) will likely be suspended for 20 minutes if the respective benchmark index — Kospi or Kosdaq — falls by greater than 10% from the day gone by’s closing worth.

The triggering of circuit breakers is proscribed to as soon as per day.


Circuit breakers in India are triggered when the Nifty 50 or Sensex breaches a pre-determined restrict. That restrict is 10%, 15% and 20% above or under the indexes’ respective earlier day shut.

Relying on which restrict is breached, a market-wide buying and selling halt will final from 15 minutes to 1 hour 45 minutes, and even shut for the day.


The Singapore Exchange applies circuit breakers to element shares of the Straits Times Index, MSCI Singapore Index and different merchandise — together with shares and exchange-traded fund — that meet sure standards.

The circuit breaker in Singapore is triggered when a potential buying and selling worth falls exterior the “worth band,” outlined as 10% above or under its worth inside a 5-minute interval. That worth is known as the “reference worth.” 

When the buying and selling curbs are in place, a 5-minute cooling-off interval will happen, the place buying and selling can solely be carried out inside 10% above or under that reference worth.   


Indonesia revised guidelines on its circuit breaker this week. Beneath the brand new guidelines, buying and selling will halt for 30 minutes if the principle inventory index — the Jakarta Composite Index — falls by 5% or extra from the earlier shut.

Earlier than the most recent change, the index needed to drop by 10% or extra earlier than the circuit breaker kicks in.


A 30-minute buying and selling halt takes place on all listed securities when the benchmark SET Index falls by 10% from the day gone by’s shut. If the SET Index falls by 20% from the earlier shut, buying and selling will likely be halted for an hour.

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