Circuit Breakers

A circuit breaker is an automatic, temporary trading halt on certain securities when the underlying stock is experiencing times of high volatility. It's a measure put in place to help restore and bring order to the markets. Here are all the stocks halted on a circuit breaker today,...

The S&P 500 plunged 9% just after the market opened Monday, triggering an automatic trading stoppage for the third time in a week. Rate Cut Doesn't Bring Calm The market was reacting to the Federal Reserve's emergency interest rate cut over the weekend — its biggest cut since the...

Root9B Holdings Inc (NASDAQ: RTNB) investors have been rattled since Friday morning when the stock halted seven times on circuit breakers. Since then, Nasdaq halted trading twice pending news and, on Wednesday morning, twice on circuit breakers. The nano-cap stock is up 287 percent since Friday....

Eric Scott Hunsader combines his 25-year plus years of experience developing successful real-time trading software and founded Nanex in 2000. Nanex develops NxCore, a high-performance ticker plant technology that delivers Telvent DTN's whole market real-time streaming data service (sales,...