This symbol represents a fund's or a company's stock on an exchange. The ticker can be the most dependable way to identify a security, because it is less likely to change than a security name. Ticker symbols for companies listed on the NYSE or AMEX are up to three letters long. Companies traded on the Nasdaq National Market or Nasdaq Small-Cap exchanges commonly consist of four to five letters. Tickers for multiple share classes of stocks are denoted with a period followed by the share class letter. For example, the ticker symbol for the A shares of j.M. Smucker is SMJ.A.