ELI5: Explain Like I'm 5

Bull (stock market speculator)

A stock market speculator (aka bull) is someone who guesses that the prices of stocks in the stock market are going to go up, and then buys those stocks in the hopes that it will make them a lot of money when the prices go up like they predicted. If a bull is correct and the prices go up, they can sell their stocks at a higher price than they paid and make a profit. If the bull is wrong and the prices go down, then they might lose money. Bulls make their guesses by looking at things like the history of how a stock has performed in the past, industry news, and the general economy.