I. When the sum of the residuals is greater than zero, the data set is nonlinear. II. A random pattern of residuals supports a linear model. III. A random pattern of residuals supports a non-linear model.
bull market definition. A market, especially a stock market, characterized by rising prices; the opposite of a bear market. We can always go back to worrying; we are still in a bull market for fear.
By Ben Phoenix Submitted On November 12, 2008. A Bull Market and a Bear Market are considered primary trends. A primary trend is the state of the market that is strong across the entire market and usually lasts for about a year or more. The term bull market is used to describe an upward trend in the market, leading to investor confidence which can lead to rising values of stocks.