TITLE:
Hedging with Stock Index Options: A Mean-Extended Gini Approach
AUTHORS:
Haim Shalit, Doron Greenberg
KEYWORDS:
Hedge Ratios; Systematic Risk; Basis Risk; Risk Aversion; Mean-Gini
JOURNAL NAME:
Journal of Mathematical Finance,
Vol.3 No.1,
February
28,
2013
ABSTRACT: One of the more efficient methods to hedge portfolios of securities whose put options are not traded is to use stock index options. We use the mean-extended Gini (MEG) model to derive the optimal hedge ratios for stock index options. We calculate the MEG ratios for some main stocks traded on the Tel Aviv Stock Exchange and compare them to the minimum-variance hedge ratios. Computed for specific values of risk aversion, MEG hedge ratios combine systematic risk with basis risk. Our results show that increasing the risk aversion used in the computation reduces the size of the hedge ratio, implying that less put options are needed to hedge away each and every security.