Trefis helps users understand how a company’s products affect it’s stock price, so it’s useful for analysts and anybody else interested in stocks and shares. The Trefis team consists of engineers and former Wall Street professionals, according to the website description, and they build a model for each company’s stock price.

For each company you can quickly see the main products and how important they are in the company’s stock valuation – each product represents a percentage of the total. Users can look at forecasts and play with this by adding in their own assumptions, and it’s also possible to consult with the experts.

This is a popular activity and one that could benefit from easy explanation to demystify how the stock market works. Trefis has been reviewed by major national newspapers and looks interesting, so the free trial period should be worth a go.