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.
DEFINITION of 'Trending Market'. A market that is trending in one direction or another. A bull market is trending upward, while a bear market is trending downward. A trending market can be classified as such for either the short, mid or long term.