The screaming calls from hedge funds started coming for Daniel Nadler on Jan. 24, 2012. That was the day Nadler, then a 28-year-old Harvard Ph.D. in economics, co-wrote a story on Bloomberg pointing out how the strength of the dollar can predict weekly lows in the S&P 500 index. At the time traders were making a bundle on this dollar-S&P correlation. “They were like ‘You betrayed the brotherhood! If you discover it, you trade off it–you don’t make it public and kill the arbitrage,’” says Nadler, a fast-talking Canadian with dark ringlets flopping over his forehead.

http://www.forbes.com/sites/stevenbertoni/2014/05/07/can-kensho-bring-google-style-search-to-stock-picking/