Fractal Spectrum of 60 Stocks over 60 Years

This code shows the stock market is of Fractal in nature, complex covariance is used to calculate zero padded stocks of different length.

When we analyze stocks over many years, we will find some relative young stocks were not on market yet, we assume them were zero then, their contribution to the mutiple variate covariance will be padded as unit one, as one times any number doesn't contribute anything, it allows us to check the rest old stocks behavior. 60 years 60 oil and gas stocks are used as an example here. It shows the cycle of investing and spending alternations on Fractal scales.