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Scaling portfolio volatility and calculating risk contributions in the presence of serial cross-correlations
portfolio market risk volatility scaling square-root-of-time rule
2010/10/21
In practice daily volatility of portfolio returns is transformed to longer holding periods by multiplying by the square-root of time which assumes that returns are not serially correlated. Under this ...
Memory effect and multifractality of cross-correlations in financial markets
Econophysics Stock market
2010/10/20
An average instantaneous cross-correlation function is introduced to quantify the interaction of the financial market of a specific time. Based on the daily data of the American and Chinese stock mark...
Cross-correlations in Warsaw Stock Exchange
Statistical Finance Data Analysis Statistics Probability Physics Society
2010/12/16
We study the inter-stock correlations for the largest companies listed on Warsaw Stock Exchange and included in the WIG20 index. Our results from the correlation matrix analysis indicate that the Poli...