It’s a thing that happens every day: Investors make money off data that you’re giving them for free. Think of something simple, like going to a store for some new clothes. That simple retail transaction generates a legion of data, like where you’re shopping, your demographics and exactly what choices you make in the store. That data is anonymized and aggregated with other shoppers’ data before being sold. The end user? It’s often hedge funds. Read more at CNBC.