Stockle is an online game that combines vocabulary puzzles and stock market knowledge. The popular word game Wordle served as inspiration for Stockle, which asks players to predict a four-letter stock symbol within a set number of attempts. At the start, players enter a four-letter stock symbol. After each guess, the game responds by changing the color of the letters. Stockle is a stock symbol guessing game where players have to guess a specific stock or ETF each day by entering valid stock symbols.