Notice of RetractionMarket improvement, changes of correlated structure and contagion

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

With the implementation of related reform measures, the efficiency of Chinese securities market having been improved since it reflects information and psychological expectation factors better and better, which will result in some changes to correlated structure between securities markets of China to the other major economies. America exploded sub-prime mortgage crisis in 2007 which made world economy suffer from severe shocks. Combining the improvement of Chinese securities market and its correlated structure to other markets to investigate our sample by related test methods of vector autoregression (VAR) model, we find corresponding evidence for those views above.