원/달러 환헤지 전략에 관한 실증연구 - 롤오버와 만기매칭 비교

This paper investigates the choice of the expiry of hedging instruments in Won/Dollar futures market as the hedge performance is one of the essential components which determine the returns on foreign investment. For this, we define ‘Rollover Hedge Net Profit’ (RHNP, hereafter) as the difference between the return from rollover hedge strategy and that from duration-matching hedge strategy. Based on various representations of no-arbitrage condition, we decompose the RHNP into economically meaningful factors: current forward term premium, future forward premiums, interest rate differentials, deviations from the CIP condition, currency risk premium and expectation on the change in exchange rate. The empirical results suggest that in average, the hedge strategy which rolls over the futures of short expiry is more profitable than duration-matching hedge strategy for domestic investors. Among various factors, deviations from the CIP condition are shown to be the most significant driving force of RHNP and they are, conceptually, related to arbitrage opportunities. This result implies that relative profitability of the roll-over hedge strategy stems from the difference in the degrees of efficiency between the short expiry futures market and medium- or long-term expiry futures market.