Jane Street is an example of a company that builds models and predicts stock prices (short term only) successfully. http://vimeo.com/14317442 http://vimeo.com/

Jane Street is an example of a company that builds models and predicts stock prices (short term only) successfully. http://vimeo.com/14317442 http://vimeo.com/14317442 They made $2 billion last year, I think.