DocumentCode
2445129
Title
Notice of Retraction
The Complex Effect of the Financial Crisis on U.S. S&P 500 Stock Market
Author
Xu Xiaoping ; Han Dingding
Author_Institution
Sch. of Inf. Sci. & Technol., East China Normal Univ., Shanghai, China
fYear
2010
fDate
7-9 May 2010
Firstpage
4764
Lastpage
4767
Abstract
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.
We empirically investigated the price fluctuations of S&P 500 stock market using daily close price of S&P 500 stocks under two different periods as corresponding to the time before the financial crisis and under the crisis. Based on our analysis, it is found that under the financial crisis, the weight distribution is showing a special form as majority of links imply strong positive correlation and node numbers with the IS value loses power-law distribution. We establish the stock market network with maximum spanning tree through the correlation matrix and find “community structure" has been greatly changed as grouping coefficient rapidly reduced. Degree distribution has remained a power-law distribution, but the end of the deviation increased. Meanwhile, the distribution of intermediate nodes is more crowded.
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.
We empirically investigated the price fluctuations of S&P 500 stock market using daily close price of S&P 500 stocks under two different periods as corresponding to the time before the financial crisis and under the crisis. Based on our analysis, it is found that under the financial crisis, the weight distribution is showing a special form as majority of links imply strong positive correlation and node numbers with the IS value loses power-law distribution. We establish the stock market network with maximum spanning tree through the correlation matrix and find “community structure" has been greatly changed as grouping coefficient rapidly reduced. Degree distribution has remained a power-law distribution, but the end of the deviation increased. Meanwhile, the distribution of intermediate nodes is more crowded.
Keywords
financial management; matrix algebra; stock markets; trees (mathematics); correlation matrix; financial crisis; maximum spanning tree; power-law distribution; price fluctuations; stock market network; Communities; Correlation; Finance; MATLAB; Social network services; Stock markets; System-on-a-chip; community structure; complex networks; correlation matrix; maximum spanning tree; power-law distribution;
fLanguage
English
Publisher
ieee
Conference_Titel
E-Business and E-Government (ICEE), 2010 International Conference on
Conference_Location
Guangzhou
Print_ISBN
978-0-7695-3997-3
Type
conf
DOI
10.1109/ICEE.2010.1197
Filename
5593171
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