熊同学2019-07-28 19:47:48
熊同学An analyst is studying a stock that is currently trading at $35. The analyst estimates that there is 33% probability that the stock will trade at $50 after one year, a 20% probability that the stock will trade at $42, and a 47% probability that the stock will trade at $20. What is the volatility of this stock return? A 15% B 26% C 36% D 39% 这道题可以用ln（y1/y2）来算收益么
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Crystal2019-07-29 17:45:18
Crystal按理说是可以的。但是由于和标准答案是不一样的算法，所以最后的答案可能会有误差，但是这个误差是不影响选择的。
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