Bull

An investor who thinks the market, a specific security or an industry will rise.

Investopedia Says:
Bulls are optimistic investors who are presently predicting good things for the market, and are attempting to profit from this upward movement. For example if you are bullish on the S&P 500 you will attempt to profit from a rise in the index by going long on it. Bulls are are the exact opposite of the market's bears, who are pessimistic and believe that a particular security, commodity or entity will suffer a decline in price.

Bullishness does not necessarily apply only to the stock market; you could for example be bullish on just about anything, including commodities like soy beans, crude oil or even peanuts.

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Person who thinks prices will rise. One can be bullish on the prospects for an individual stock, bond, or commodity, an industry segment, or the market as a whole. In a more general sense, bullish means optimistic, so a person can be bullish on the economy as a whole. When a bull attacks, it throws its opponent upward, whereas a bear grapples its opponent down. The symbol of a bull and bear locked in combat represents the stock market. See also Bear.