> Alot going on today. a 4% drop in a day is pretty darn big.

Yeah, but it's up 50% in the last 5 years. 4% drop puts us back where it was, oh, in July of this year.

Only has to fall by 33% to go back 5 years then.

A few days at > 10% and that's perfectly doable in a week. Unlikely I'll grant you but this is a large move at the top of a bull market amid huge concentration and weakening fundamentals. There are reasons to pay attention to it.