Hey, I'm Kramer.

Welcome to a special coming you from San Francisco, the cradle of the new American Revolution

edition of Mad Money.

I'll be one of my friends just trying to make you some money because my job is not just

entertaining you, but to educate you and teach you so call me at 1-800-743-CMBC or tweet

me at Jim Kramer.

You know why we come out to the West Coast, the heart of Silicon Valley every few months?

Because if you're going to cover stocks, whole stocks, you need to know which industries

are being disrupted.

That's Wall Street speak for a group that's about to get wrecked by some revolutionary

new technology.

And you can't understand that without looking at the actual disruptors in the eye to see

who's a poser and who's the real deal.

What makes it so important?

Look on the day where the Dow shed 70 points.

That doesn't be dip point 1-3%.

And that's actually even stuff is 0.18%.

I can tell you, tech matters.

Why?

Because it's the largest sector in the S&P 500.

It's kind of roughly 20% of this key benchmark.

But the truth is, what happens in tech reverberates to the rest of the market.

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