Live from the Nasdaq Market site overlooking New York City's Times Square.

This is Fast Money. I'm Melissa Lee.

Tonight's Trader lineup, Guy Adami, Tim Seymour, Karen Feynerman,

and Pete Najarian, co-founder of Marketabellian.com.

Tonight on Fast, outage and outrage.

She Facebook shares plundering nearly 5% as a whistleblower sounds the alarm,

and the company is hit with a massive service disruption.

We're breaking down the fallouts straight ahead, plus delivering gains.

Tesla holding in the green despite today's sell-off will bring you the big number

that had investors driving into this stock.

And later, Karen, ringing the register,

the one retail name she hit the sell button on today,

she'll tell us what it is and why it's time to bag it.

But we start off with a major sell-off on Wall Street,

the S&P dropping more than a percent, the Dow down over 300 points.

The tech-heavy Nasdaq plunging more than 2% posting its lowest close since June.

And take a look at the hit to the biggest names in the space.

Apple, Facebook, Amazon, Microsoft, Google,

losing a combined $236 billion in market cap today alone.

So is there more pain ahead?

Do you go in and start buying?

Guy, what do you think?

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