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NEW YORK (TheStreet) - LinkedIn (LNKD) shares rose 2.9% to $97.01 in pre-market trading Friday, a day after the business social network began trading on the NYSE. On Thursday, the stock posted triple digit gains, soaring 109% above its IPO price of $45.

While some tech watchers caution that

LinkedIn's rally may not last,

the IPO's huge reception proved one thing:

Investors are hot

for young, public tech firms.


(AMZN) - Get Free Report

said Thursday that it is now selling more e-books for the Kindle than real books. Since April 1, for every 100 print books Amazon has sold, it has sold 105 Kindle books, the e-commerce giant said.

Shares of Amazon dropped 0.3% in pre-market trading Friday to $198.20.

Verizon Wireless

(VZ) - Get Free Report

is expected to begin offering family data plans that support multiple devices including smartphones and tablets, according to


. This summer the carrier will eliminate unlimited data plans for smartphones and replace them with a tiered pricing model.

Liberty Media


is seeking to buy Barnes & Noble (BKS) - Get Free Report for $17 per share

. The world's largest bookseller said the special committee of its board, as well as its financial advisors, plan to evaluate the deal, which values Barnes & Noble at around $1 billion.

Shares of Barnes & Noble soared 31.8% in pre-market trading Friday.


CEO Mark Zuckerberg is planning on making his second trip to China as the company looks for the best way to expand into the country, according to


. Zuckerberg last visited China in December where he met with executives from Chinese e-commerce giant



--Written by Olivia Oran in New York.

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