The new passion for the financial markets finally led me to my favorite investment book:"What Works on Wallstreet" by James P. O'Shaughnessy My first impression of the click-baity, catchy title was that maybe I should not expect too much from it. I already had read some books which provided investment formulas based on cherry-picked data and outdated short-term studies. I was of course already aware of simple price multiples like Price-to-Book, Price-to-Sales and Price-to-Earnings. Why should it be different this time.