Fan, Jianqing; Liao, Yuan; Shi, Xiaofeng - Volkswirtschaftliche Fakultät, … - 2013
Estimating and assessing the risk of a large portfolio is an important topic in financial econometrics and risk … management. The risk is often estimated by a substitution of a good estimator of the volatility matrix. However, the accuracy of … such a risk estimator for large portfolios is largely unknown, and a simple inequality in the previous literature gives an …