Twitter cuts revenue forecast, shares slump

(Reuters) - Twitter Inc cut its full-year revenue forecast due to weak demand for its direct response products, sending its shares down as much as 24 percent on Tuesday. Twitter said it expected 2015 revenue of $2.17 billion (£1.42 billion) to $2.27 billion, compared with an earlier forecast of $2.3 billion to $2.35 billion. The company's direct response products are tweets that businesses can send to targeted users, which can include a clickable business card or a link to drive traffic to