Study the Optimal Hedge Ratio in Exchange Rate, Using the Future Gold Market in Developing and Developed financial Market: A Case Study of the Tehran Stock Exchange and Chicago

The purpose is to investigate possibility of hedging the risk of exchange rate fluctuations by entrancing to the gold futures market and comparing the risk hedge in Tehran Exchange Stock with the Chicago Exchange stock. In order to that, daily data from December 13, 2007 to April 30, 2018 was used for Iran and United States and the Markov-Switching Model were used. The results showed that the coefficient of the futures price index of gold coins for zero regime was 0/0013, which indicates that for the coverage of the risk, for each currency contract, the order of 0/0013 units of the gold coin contract should be purchased. For regime one, the coefficient, was 0/0046, which indicates that to cover the risk of risk price dollar, we should buy 0/0046 units of the gold coin contract.The results of this study showed that the coefficient for future changes in gold prices for the Chicago Exchange was 0/0011 . For regime one, the coefficient of future price changes of gold was 0/0008.