Purpose – The purpose of this paper is to study how the market correlation changes in Chinese stock market and how the market correlation affects stock returns. Design/methodology/approach – The authors first examine the relationship between the market correlation and the market return....

Stream data from devices and sensors is considered a typical kind of big data. Though being promising, they have a good prospect only when we can reasonably correlate and effectively use them. Herein, services come back to the spotlight. The paper reports some of the authors' efforts in...