Problem
Find the Yahoo ticker name for Google. (1) Download Adj Close stock data from the beginning of 2004 to the present time from Yahoo. (2) Calculate the returns. Plot stock prices, and log returns. (iii) Plot the histogram of Google returns and the normal distribution with the same mean and variance. (3) Calculate the skewness, mean, variance and kurtosis of the returns. (4) Use scilab.stats.probplot (scs.probplot in the notebook) to test the normality of the series of returns by plotting the qqplot.