Estimation of the covariance matrix of asset returns is crucial to portfolio construction. As suggested by economic theories, the correlation structure among assets differs between emerging markets and developed countries. It is therefore imperative to make rigorous statistical inference on...

This article proposes a new nonparametric test to detect financial contagion by using a Kendall's tau-based asymmetric measure of comovements between two time series. Simulation studies demonstrate the reasonable size performance and good power in finite sample of our test. An empirical...