... 91 101 decision structure, 94 101 rationale for, 91risk/reward and, 92–94, 97–98Buying a put strategy, 103 –113decision structure, 106 –113rationale for, 103 risk/reward and, 104 106 Calendar spreads, ... 31FLEX options, 11Foreign exchange options: interest rates and, 28Phi and, 48–49Forward price, 61Futures contracts, 11, 42, 129, 165Gamma:defined, 24–25 option strategy description and, 49–53price ... www.BestOptionStrategies.com.The site contains:r Options calculatorsrReviews of options books and productsrArticles that go into more detail about topics in this bookrInteractive forums...