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.
Stock prices move in trends. When the trend is up, it's called bullish; when it is down, it's labeled bearish.. An uptrend is characterized by higher highs and higher lows; a down trend by lower highs and lower lows. A major market uptrend lasting three to four years is called a bull market, while a major down trend -- typically 12 to 24 months -- is called a bear market. Bullish and bearish can also refer to events, stock charts, opinions and people. Bullish and bearish can describe stock trends and other market aspects.