The time series we studied in the current article is the log-transformed daily returns of the Shenzhen composite index from December 25, 1995 to December 31, 2010. The Shenzhen composite was created with April 3, 1991 as the base of 100. In computing the composite index, all listed companies in the Shenzhen Stock Exchange are weighted by their volume. That is, the composite index = 100*total value of the day/total value on April 3, 1991.