I am curious if there are people present on ET who have been on this path. I have heard that some quant hedge funds have been working on these ideas - not sure if anyone has put such a thing in production - but I would be surprised if big quant hedge funds of the world are not making money from this phenomena. Some old links (2010) or so http://singularityhub.com/2010/10/21/twitter-predicts-the-stock-market/ http://cs229.stanford.edu/proj2011/...eedsForThePredictionOfStockMarketMovement.pdf Please share updated links if you find something interesting.