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Morning six-pack: What we're reading Friday

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Happy Friday. Only five more shopping days until Halloween.

Have you tweeted about the Twitter initial public offering yet? The microblogging site hopes not to go where Facebook has gone before. (Venturebeat)

Elsewhere in tech, look out Google: Your Glass is about to get some competition, thanks to Samsung. (The Verge)

Know this about Wall Street and social media: Carl Icahn gets it, and others could start following suit. (Los Angeles Times)

The Federal Reserve balance sheet is closing in on $4 trillion and the S&P 500 has gained more than 160 percent since the March 2009 low. This, now, generates worry about speculation. (The Guardian)

At least we can take solace that the U.S. is not the only place where good news is bad news. There's China, too. (Wall Street Journal)

And, finally ... Bubbles? We don't need no stinking bubbles! Still, here are five signs that things are at least percolating. CNBC.com's Patti Domm explains.

—By CNBC's Jeff Cox. Follow him on Twitter @JeffCoxCNBCcom.

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