So far, you’ve seen some stock market data and learned about some of the market processes that generate these data, so you’re beginning to see what these long streams of numbers actually mean. As is true of all types of data, stock data represent measurements of things in the real world that have certain properties, and people often take particular steps or make certain assumptions on analyzing them. In this lesson, we’re going to talk about some of the important properties of stock data that lead people to analyze them in certain ways.