The business press has come to describe stock talk on Twitter as "the modern version of traders shouting in the pits" and calls related third-party applications, such as TweetTrader.net, “a Bloomberg for the average guy” (Business Week). In the first 6 months of this year, we have collected a large number of stock-related microblogging messages containing the dollar-tagged ticker symbol of an S&P 100 company. The figure shows the distribution of messages throughout the day. We observe a significant spike in message volume before the markets open. The majority of tweets are posted during the trading hours between 9:30 am and 4:00 pm. This provides further evidence that stock microblogs are truly used by financial professionals to exchange relevant trading ideas in real time and when it matters. They truly capture the market conversation.
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