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 'Secular Market'. A market driven by forces that could be in place for many years, causing the price of a particular investment or asset class to rise or fall over a long period of time. In a secular bull market, strong investor sentiment drives prices higher, as there are more net buyers than sellers.