Going to japan in 90days total cost yan25,000 for expenses .to day spot exchange rate $0.60/yen and 90 days forward rate is $0.63/yen. you can buy the 90days call option on yen with the exercise rate of $0.64/yen for the premium of $0.03 per yen. Assuming that you expected future spot exchange rate is $0.64. the 90 days interest rate is 4% annually in the USA and 6% annually in Japan. what is money market hedge, what is the call option hedge, what is forward hedge.