老师，416题，我担心利率上升，那我为什么不long futures呢？是因为C选项的标的不是利率吗？

仓储成本不应该求自然对数吗？为什么直接除就可以？

PPT的16-227页上讲述PMF的性质，请问其中第一个性质表示什么意思？如何理解？

The measurement error in VaR due to sampling variation should be greater with:Fewer observations and a high confidence level(e.g. 99%) 老师您好！我想问一下为什么置信度水平越高越容易有偏差？置信度水平很高，区间也就很大，这样包含正确的VaR值的可能性就会增加，为什么这里说更可能有误？

Consider a stock portfolio consisting of two stocks with normally distributed returns. The joint distribution of daily returns is constant over time and there is no serial correlation. Stock Epsilon has a market value of $100,000 with an annualized volatility of 22%. Stock Omega has a market value of $175,000 with an annualized volatility of 27%. Calculate the 95% confidence interval 1-day VaR of the portfolio. Assume a correlation coefficient of 0.3. Round to the nearest dollar assuming 252 business days in a year. The daily expected return is assumed to be zero. 老师您好！这道题能不能用视频里的方法讲一下？就是分别求出VaR1=Zα×σ×Pa，VaR2=Zα×σ×Pb，然后使用VaRp^2 = VaR1^2 + VaR2^2 + 2×ρ×VaR1×VaR2

T分佈的均值為0嗎

DX是方差還是標準差

老师，这道题固息说是两年期，没有说半年复利一次，所以在第一次半年的时候收到浮动利息的时候，固息债还没有支付啊

请问“20！”怎么通过计算器算出来？

c怎么不对？交割的时候有风险啊