People holding mobile phones are silhouetted against a backdrop projected with the Twitter logo in this file illustration photo taken in Warsaw September 27, 2013. Twitter Inc raised the top end of ... more 
People holding mobile phones are silhouetted against a backdrop projected with the Twitter logo in this file illustration photo taken in Warsaw September 27, 2013. Twitter Inc raised the top end of its IPO price range by 25 percent and will close its books a day early, signaling strong demand for the most closely watched Silicon Valley debut since Facebook Inc last year. Pricing of Twitter's shares ends Wednesday, with public trading of the stock expected for November 7, 2013. REUTERS/Kacper Pempel/Files (POLAND - Tags: SCIENCE TECHNOLOGY BUSINESS LOGO) less 
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Reuters | Photo By KACPER PEMPEL / REUTERS
Tue, Nov 5, 2013 8:05 PM EST