Pythia is an AI- and mathematics-based tool for comparing and evaluating stocks. A central feature is the Pythia rating, which assigns to each stock a number between 0 and 100, reflecting the stock's prospects for the following weeks, up to a couple of months. The higher the rating, the higher is is the likelihood of yielding positive returns on the one hand, and of not seeing substantially increasing risk, on the other hand. The Pythia rating is the result of a combination of machine learning