A Level 3 rout halts trading for the remainder of the trading day. Level 1 and Level 2 circuit breakers can be triggered between 9:30 a.m. and 3:25 p.m. Eastern. A Level 3 breach can be triggered ...

Even if you aren’t an electronics person, you probably have a working knowledge of circuit breakers. When the lights go out, you find the circuit breaker and flip it back to the on position.