The Piotroski F-Score screen aims to identify deep bargain-bucket stocks that are in recovery. Josef Piotroski, a finance professor, recognized that, while it has long been shown that bargain stocks have strong collective returns, there is very wide individual variability. What he wondered was whether it was possible to weed out the poor performers and identify the winners in advance. He therefore sought to develop a simple accounting-based scoring system for evaluating a stock’s financial strength. Piotroski's F-Score looks at value stocks and tests nine variables from a company’s financial statements. One point is awarded for each test that a stock passes. Piotroski regards any stocks that scored eight or nine points as being the strongest. In this version of the screen, Price to Earnings, rather than Price to Book, is used as the measure of "cheapness". more »