填空题 Straddles are a form of (speculate) where the trader tries (make) a profit by (speculate) on the differences (occur) in discount and premiums of the different forward delivery months. By (straddle) the trader hopes (buy) the contract in one delivery month (sell) in another. If the price changes, he will tell his broker (close) the straddle and reverse the transaction. There are bull and bear straddles, the bulls (buy) in near months and (sell) in near months and (buy) in distant months, both (want) (make) a profit by (work out) the way the market will go.