<blockquote>Lexicon packages the news in a way that its robo-clients can understand. It scans every Dow Jones story in real time, looking for textual clues that might indicate how investors should feel about a stock. It then sends that information in machine-readable form to its algorithmic subscribers, which can parse it further, using the resulting data to inform their own investing decisions. Lexicon has helped automate the process of reading the news, drawing insight from it, and using that information to buy or sell a stock. The machines aren't there just to crunch numbers anymore; they're now making the decisions.</blockquote>
<a href="http://arstechnica.com/tech-policy/news/2011/01/algorithms-take-control-of-wall-street.ars">Algorithms take control of Wall Street</a>.