This paper examines the impact of analyst corporate site visits on stock price crash risk using a unique data set of Chinese A-share stocks listed on the Shenzhen stock exchange (SZSE) over the 2012–2019 period. We find that the frequency of analyst corporate site visits is positively...

Sample covariance matrices tend to underestimate the risk of optimized portfolios. In this article, we identify special portfolios, termed “eigenportfolios,” that capture these systematic biases. Further, we present a methodology for estimating eigenportfolio biases and for adjusting the...