10 Year. Morningstar rated the Global Technology Fund among 196, 196, 186 and 144 Technology funds for the overall rating and the 3-, 5-, and 10-year periods (as applicable) ending 02/28/2017, respectively.
Geometrically an eigenvector, corresponding to a real nonzero eigenvalue, points in a direction that is stretched by the transformation and the eigenvalue is the factor by which it is stretched. If the eigenvalue is negative, the direction is reversed.
The first order autoregressive model, , has a unit root when. In this example, the characteristic equation is. The root of the equation is. If the process has a unit root, then it is a non-stationary time series.That is, the moments of the stochastic process depend on. To illustrate the effect of a unit root, we can consider the first order case, starting from y 0 = 0:he first order autoregressive model, , has a unit root when. In this example, the characteristic equation is. The root of the equation is. If the process has a unit root, then it is a non-stationary time series.