  A new bivariate copula is proposed for modeling negative dependence between
two random variables. We show that it complies with most of the popular notions
of negative dependence reported in the literature and study some of its basic
properties. Specifically, the Spearman's rho and the Kendall's tau for the
proposed copula have a simple one-parameter form with negative values in the
full range. Some important ordering properties comparing the strength of
negative dependence with respect to the parameter involved are considered.
Simple examples of the corresponding bivariate distributions with popular
marginals are presented. Application of the proposed copula is illustrated
using a real data set.
