Hence, a ticker tape

automatically records each transaction that occurs on the exchange floor, including trading volume, onto a narrow strip of paper or tape. ... Due to the nature of the markets, investors from all corners of the globe are trading a variety of stocks in different lots and blocks at any given time.

How do stock tickers work?

Ticker tapes automatically recorded all trading activity on the exchange floor onto a narrow piece of paper (the tape). During those times, running the numbers was literal; messengers or “pad shovers” actually ran a circuit between the trading floor and brokerages in order to provide updated stock prices.

How do you read stock ticker tape?

Each entry on the ticker tape displays the stock symbol (indicating which company's stock has been traded), volume (number of shares traded), the price per share at which the trade was executed, an up or down triangle showing whether that price is above or below the previous trading day's closing price and another ...