Traders woke up to a sharply lower stock market on Monday morning and a spike in volatility. The Dow opened 2.7% lower, the S&P 500 opened 4.2% lower and the Nasdaq Composite opened 6% lower. The ...

Watch this level for a circuit-breaker to be triggered. Photo: Getty Images/iStockphoto The market sell-off tied to President Trump’s “reciprocal” tariffs entered a second day on April 4.

A big drop in the S&P 500 could lead to a pause on trading Traders woke up to a sharply lower stock market on Monday morning and a spike in volatility. The Dow DJIA opened 2.7% lower, the S&P 500 ...

The S&P 500 traded as low as 5,101.75 on Friday, down more than 5%. While this certainly feels like a significant decline, the index would have to drop to 5,018.76 to trigger the first circuit ...

A circuit breaker will be triggered if the S&P 500 falls 7%, 13% or 20%. Photo: Getty Images/iStockphoto Traders woke up to a sharply lower stock market on Monday morning and a spike in volatility.

Here's a breakdown of what it takes to trigger the circuit breakers: -- A Level 1 circuit breaker stops trade for a minimum of 15 minutes if the S&P 500 falls 7% before 3:25 p.m. Eastern time.