Is there a circuit breaker in your home that keeps tripping? It may need to be replaced. Fortunately, testing and replacing a breaker is something you can do.

The US stock market had a choppy first hour on Thursday with Dow Jones falling as much as 2,150 points, the S&P 500 and the Nasdaq down between 6.5% to 7%.

Here's what to know about so-called “circuit breakers" and when they're used to halt trading on stock markets.

Stock Market Crash: The Indian market also has the circuit breaker system, where the lower circuit is applied if Nifty 50 or the BSE Sensex falls. The share market fell sharply today (Monday, April 7, ...

Japan, Taiwan Markets Hit Circuit Breaker As Trump Tariffs Deepen Panic The last time a circuit breaker was triggered by a stock selloff was in March 2020, during the onset of the COVID-19 pandemic.

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.

While this certainly feels like a significant decline, the index would have to drop to 5,018.76 to trigger the first circuit breaker. So it still has some way to go.

Trump tariffs rattle markets, S&P 500 eyes 7% circuit breaker threshold Circuit breakers were last triggered during the early Covid-19 selloff in 2020.

Most places you live in today will manage their electrical power via circuit breakers, though fuse boxes predated that technology in the early 20th century.

Authorities seized thousands of stolen circuit breakers stacked in large storage bins belonging to Eugene Popa of Perris, who was accused of buying them from thieves and reselling them online.