In Big Bull Junior, it's all about your stocks portfolio/collection. You try to collect companies' stocks and try to increase the price of the companies (or trying to decrease the price of companies held by other players) in the central market. But since you don't know what stocks are held by other players, you might inadvertently help them increase the value of their collection!
During one's turn, a player can collect a card, increase/decrease the value of one of the stocks in the central market. You can bluff, strategize or collude to spike/crash stock price.
At the end of 10 rounds, the wealthiest/richest player wins the game.
Its time to pull your socks oops....stocks! Can you become a big bull.
—description from the designer