Types of stock tickers
Each stock exchange sets the rules for the length and format of its stock ticker symbols, which is why variations in stock tickers exist. As previously noted, most stock tickers are three or four letters, and some stock exchanges allow numbers. The New York Stock Exchange (NYSE) allows as many as four letters, and the Nasdaq allows up to five.
Some stock ticker symbols also include modifiers, which are additional (usually fifth) letters or letters following periods in the symbols. Modifiers can be used to express the type of security, such as a mutual fund; the type of stock, such as a preferred stock; or the class of stock, which denotes shareholder privileges.
Companies create different classes of shares to allow the management team to hold a higher percentage of the vote than they do equity in the company. This way, investors still receive something for their investment, but management maintains control over decisions.