How will the individual stock circuit breaker halt work?
Beginning at 9:45 am, a trading halt will go into effect for an individual stock that experiences a price swing of 10% or more during a rolling five-minute time period. The primary listing market is responsible for communicating the halt to the SIPs, at which point all markets are required to cease trading for five minutes. The halt will be lifted after the stock has been re-opened by the primary listing market. If the stock has failed to open after a ten-minute period, other markets are eligible to resume trading. (See question #7 for details on resumption of trading on Direct Edge.) The ability to invoke individual stock circuit breakers expires daily at 3:35 pm.
