Traders turn to Twitter for market news. Now they can measure ...

Feb. 28, 2014 – 6:49 AM PST Feb. 28, 2014 – 6:49 AM PSTFinancial firms once blocked Twitter to prevent employees leaking sensitive information. It worked, but there was a problem: reporters and companies were using Twitter to reveal important news, leaving traders to rely on second-hand accounts.“If Carl Icahn tweets about Apple, you can’t wait for some journalist to write it up,” said Brian Rooney, who is Bloomberg’s head of product for news. “As social moved into the financial sphere, it became absolutely clear we had to track it.”In response, Bloomberg introduced a Twitter compartment that sits alongside the flow of other news and financial data that appear on its famous terminals. The feature, which provides a way for employees to read but not send tweets, appeared last spring, shortly …


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