The trading curbs go into effect when the S&P 500 crosses certain thresholds during extreme market volatility.

During heightened volatility, circuit breakers can be triggered to curtail panic selling and prevent an extreme downward ...

Amid a 5% S&P 500 drop, investors fear a 1987-like crash. Find out why circuit breakers and interventions can prevent a ...

When stock prices and stock futures fall rapidly in a single session, exchanges implement halts in trading to avoid market ...

It's already a wild session in the stock market, with futures tied to major indexes around the globe tanking. In Japan, the ...

Circuit breakers attempt to curb panic selling and can also be triggered on the way up with manic buying. Circuit breakers are temporary measures that halt trading to curb panic-selling on stock ...

The Thursday selloff has torched more than $2.5 trillion in market value so far, but the stock market is still ways away from a trading halt. The S&P 500 was recently down 4.1%. It would need to fall ...