A circuit breaker in financial markets is an emergency measure by exchanges to temporarily halt trading if the market or an individual security drops below a certain percentage. The financial news ...

An electronic board displays the Nikkei Stock Average in Tokyo on Monday. (Kazuhiro Nogi/AFP/Getty Images) Japan’s exchange operator briefly called a halt to trading in Nikkei stock futures on ...

The S&P 500 was recently down 4.1%. It would need to fall 7% to trigger the first market-wide New York Stock Exchange circuit breaker. The second circuit breaker kicks in at a 13% decline in the S ...