Orthant probabilities applied in a two-dimensional framework are used to derive quadrant-conditional financial asset return correlations which fully capture both linear and non-linear components of co-variability. We investigate the potential for employing quadrant-conditional correlations in...

Rogers & Shi (1995) have used the technique of conditional expectations to derive approximations for the distribution of a sum of lognormals. In this paper we extend their results to more general sums of random variables. In particular we study sums of functions of dependent random variables...