Midday movers: Twitter, Textron, Sprint & more
Take a look at some of Friday's midday movers:
WPCS International - Shares of the company surged after it announced the launch of a bitcoin exchange.
Twitter - The social networking company fell after Macquarie Capital downgraded its stock to underperform from neutral.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Kate Gibson.
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