Sw. He et Jm. Xia, LOCALLY RISK-MINIMIZING STRATEGIES IN DISCRETE-TIME INCOMPLETE FINANCIAL-MARKETS, Chinese Science Bulletin, 43(19), 1998, pp. 1601-1604
For discrete time case a characterization of locally risk-minimizing s
trategies is given. Based on this characterization, it is evident that
risk-minimizing strategies must be locally risk-minimizing.