NO.PZ2016031201000047
问题如下：
Which of the following is least likely to be required by the binomial option pricing model?
选项：
A. Spot price
B. Two possible prices one period later
C. Actual probabilities of the up and down moves
解释：
C is correct.
The actual probabilities of the up and down moves in the underlying do not appear in the binomial option pricing model, only the pseudo or "risk-neutral" probabilities. Both the spot price of the underlying and two possible prices one period later are required by the binomial option pricing model.
中文解析：
在二叉树期权定价模型中，需要知道标的的现货价格，上涨后的价格和下跌后的价格，以及上涨和下跌情况下的风险中性概率。
注意这个概率并不是实际的概率，是假设投资着是风险中性的，然后根据数学计算出来的概率，所以我们称它为风险中性概率。
b选项是一期之后可能的价格？是指波动幅度，u和d吗 ？
