Bulls are optimistic about the potential of the market and the individual stocks. They believe that there will be market and stock price appreciation over time. In other words, an uptrend. Besides the common investment analysis criteria, they believe heavily in momentum, trends, and ongoing economic growth. They don't like interest rate hikes or uncertainty regarding major issues of significance.
Bulls are unlike pigs, because bulls know when to take profits.
They are happy with a realistic gain since they believe that there are a whole host of other excellent stocks with great upside to shift the profits into. Bears love market uncertainty and interest rate hikes, because these things hurt the market. They believe in price depreciation among stocks and the markets, and employ strategies to make money when things are heading south. Bears are like courageous chickens in that they are fearful and wary of the market, but instead of fleeing they use their caution to their greatest financial advantage. Chickens are afraid to commit, or to lose even a single cent.