I'd be surprised if they did that. It means they already have the capabilities to allow a machine to judge the value of each news. Maybe it's not that far, I suspect they'll keywords and then categorize each keyword into a value. For example, "broke the channel up", "optimist", and so on into 1, and bear-related keywords like "dumped" and so on to negative on, and so on.
That would be sick.
We use artificial intelligence:
Machine learning is the idea that there are generic algorithms that can tell you something interesting about a set of data without you having to write any custom code specific to the problem. Instead of writing code, you feed data to the generic algorithm and it builds its own logic based on the data