This book aims to provide an overview of existing mood or sentiment indicators in the stock market. It thoroughly describes and statistically examines 35 indicators. Well-known sentiment indicators analyzed in this book include Sentix, the ifo Business Climate Index, American consumer confidence indices, the ratio of puts to calls, and the volume of stock transactions. Using specific criteria, the indicators are compared to find the best possible sentiment indicator. The criteria used are derived from various other studies and investigations, such as the linear relationship between sentiment and contemporaneous stock prices. Finally, the influence of sentiment on tomorrow's prices is examined: Can investor sentiment predict prices? A Vek.