Toth, Bence; Kertesz, Janos - In: Quantitative Finance 9 (2009) 7, pp. 793-802
We analyse the dependence of stock return cross-correlations on the data sampling frequency, known as the Epps effect: for high-resolution data the cross-correlations are significantly smaller than their asymptotic value as observed for daily data. The former description implies that a changing...