Which of the following studies show results which are the most optimistic with respect to the trading possibilities for speculators? Hieronymous Stewart Elton-Gruber-Rentzler O Rockwell A trader shorts 3 wheat futures contracts (5000 bushels per contract) at $4.50 per bushel. Each contrac has an initial margin of $1500 and maintenance margin of $1000. What is the first price that would lead to a margin call? $4.61 per bushel $ 4.11 per bushel $ 4.39 per bushel $ 4.33 per bushel