The bull is one of the symbols of Wall Street. The Wall Street,
or financial, district contains the New York Stock Exchange,
the American Stock Exchange, and the Federal Reserve Bank of New York.
The district is also the headquarters for many investment banks,
securities dealers, utilities and insurance companies, and brokerage firms.

The terms bull market and bear market describe upward and downward
market trends, respectively. The current bull market is approximately 3 years old.
http://money.cnn.com/2012/03/14/markets/stocks-bull-market/

This bull is one of a collection of bulls at the financial investment firm where I work.