RE:Wow!Circuit breaker is the phrase given to a mandatory halt in trading (at least on TSX) to help mitigate volatile trading, A 5 minute halt in trading will occur if the security price swings 10% or more either way in a 5 minute period, I think this has been around since 2012,..getting beyond the “Circuit Breaker”,the hole we were in just got deeper, not sure if the Q4/FY19. out look news is going to be enough for many of us,,...maybe great buying opportunity for those on the sidelines,...Island