Carl Quintanilla, Jim Cramer and David Faber today’s massive stock sell-off amid increasing coronavirus fears, equities hitting sell-off lows. The stock plunge triggering a key market circuit breaker after the opening bell, halting trading for 15 minutes for the second time this week. And why Jim is slamming the government’s coronavirus response, saying 'they know nothing,' evoking his epic 2007 Fed rant.