NO.PZ2020011303000081
问题如下:
A stock price (USD) is 50 and the volatility is 2% per day. Estimate a 95% confidence interval for the stock price at the end of one day.
选项:
解释:
A one standard deviation move is USD 1. The 95% confidence interval is –USD 1.96 to +USD 1.96. The 95% confidence interval at the end of one day is, therefore, USD 48.04 to 51.96.
VAR的计算公式不是均值减去Z*标准差吗?这个里面首先没有均值,假设标准正泰分布,VAR应该=Z*标准差,另外这里的95%为什么是双尾?不应该用单尾的1.65来计算吗?为什么不是1.65*2%*50呢?