Current index = (current total market value of constituent stocks)/(total market value of constituent stocks at the closing of the last day) * closing index of the last day.

The sample stocks of the red-chip constituent index were adjusted to 47 in June, 2006 1 day, the highest level in history. 1On October 3rd, 200 1, 10 was adjusted to 27, which was mainly composed of red chips with large market value, active trading and strong industry representation. Distribution industries mainly include petrochemical industry, real estate, port transportation, automobile, science and technology and comprehensive category. Accordingly, the base period was changed to 65438+200013 October, and the base period index was 2000.

The historical low point of the red chip index is165438+ 1 187.54, and the historical high point is16466.48, which was set in August 1997.