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Twitter shares jump on market debut

7 November 2013 Last updated at 17:50 GMT

Shares in Twitter opened at $45.10 each in the first minutes of trading on the New York Stock Exchange.

That is a 73% jump from the initial asking price of $26 a share, and it means the company is now valued at a little over $31bn (£19bn).

Samira Hussain reports from New York.