Fast Money starts right now.

Live from the NASDAQ market site overlooking New York City's Times Square.

I'm Melissa Lear.

Traders on the desk for Tim Seymour, Karen Fireman, David Seaberg and Steve Groso.

Tonight on Fast, the crypto carnage continues Bitcoin getting crushed

sinking below ten thousand dollars as even Facebook cracks down on the

cryptocurrency and a top market watcher says something has changed about the

Bitcoin story.

He'll tell us what that is.

Plus, Amazon takes no prisoners.

Again, Jeff Bezos is moving into healthcare

and sending shock waves to the market,

but could it be the perfect buying opportunity?

We'll explain. But first first we begin with stocks getting slammed.

The Dow falling more than 400 points at the lows of the session,

blocking its worst two-day sell-off since Brexit.

The Dow now hovering around 26,000 and these 1%

selloffs are a rare occurrence. The Dow only had four in 2017 and since the

last one on September 5th it is up a whopping 20% from the clothes that day and just in case you've got

sell-off amnesia. Marion Webster defines a sell-off man a usually sudden

sharp decline in security prices accompanied by increased volume of

trading. So is this the start of a bigger correction or could this be your best

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