Bull

In finance, a bull is a speculator in a stock market who buys a holding in a stock in the expectation that, in the very short-term, it will rise in value, whereupon they will sell the stock to make a quick profit on the transaction. Strictly speaking, the term applies to speculators who borrow money to fund such a purchase, and are thus under great pressure to complete the transaction before the loan is repayable or the seller of the stock demands payment on settlement day for delivery of the bargain. If the value of the stock falls contrary to their expectation, a bull suffers a loss, frequently very large if they are trading on margin. A bull has a great incentive to "talk-up" the value of their stock or to manipulate the market of their stock, for example by spreading false rumors, to procure a buyer or to cause a temporary price increase which will provide them with the selling opportunity and profit they require.