Stock market abbreviations include stock symbols, which are one- to four-letter codes identifying publicly traded companies, and alphanumeric codes that identify stock exchanges, such as NYSE for the New York Stock Exchange, according to Zacks. Other abbreviations used for financial terms and concepts related to market securities include EPS, which refers to the trailing 12-month earnings divided by the outstanding common shares.
The letter codes that identify securities may have extensions that communicate additional information such as the type of shares or the market in which the security trades, explains Zacks. For example, the ABC Corporation may have a stock listing as ABC and ABC.B for class B shares of the stock. Other markets with alphanumeric abbreviations include DIJA for the Dow Jones Industrial Average and S&P 500 for the Standard & Poor's 500 Index.
Abbreviations for buy-and-sell orders include GTC, which means that the order is good until cancelled, and AON, which stands for an all-or-nothing order, explains Zacks. The PE ratio is the stock price divided by the trailing 12-month EPS. Brokers use these ratios to evaluate the best prices to buy and sell certain stocks. These abbreviations are important to know because they appear regularly in stock tickers.