A more thorough explanation:

A trading curb is a temporary restriction placed on trading a particular security to prevent sudden and significant price movements. It is also known as a "curb." This measure is taken to maintain market stability and prevent panic selling or buying.

Suppose a company announces unexpected news that could significantly impact its stock price. To prevent a sudden drop or surge in the stock price, a trading curb may be implemented to slow down trading activity and allow investors to digest the news.

Another example is when a stock experiences a sudden surge in demand, causing its price to skyrocket. A trading curb may be put in place to prevent the stock from becoming overvalued and to give investors time to evaluate the situation.

These examples illustrate how trading curbs can help prevent market volatility and maintain stability.