Which of the following errors would most likely be a result of overfitting a machine learning model? A. Inability to recognize relationships within the training data B. A predictive model that treats true parameters as if they are noise C. The discovery of unsubstantiated patterns that lead to prediction errors为什么A不对c对

An analyst creating a dataset composed largely of product reviews would most likely classify the data sources as generated by: A. sensors. B. individuals. C. business processes.这是什么知识点

为什么deflation推荐非通胀指数债券？这里negative/low growth是表示什么？这表格还重要？感觉很牵强

The computerized buying and selling of financial instruments, in accordance with pre-specified rules and guidelines, is best described as: A. a dark pool. B. robo-advising. C. algorithmic trading.这是什么知识点

为啥用e的指数计算

这个知识点有讲过吗？为什么不用duration

老师，这道题中，VaR的前提不也是要求收益率呈正态分布（收益率对称），可以用来衡量Alternative investment的下行风险吗？因为视频中说Sharpe ratio要求是收益率对称才能用，感觉VaR的这个前提更严格啊

为什么The variance of the error term is the same for all observations.对了？不应该是方差稳定吗，怎么能值相同

请问 半方差因为只考虑低于benchmark的数据部分 为什么分母是n-1 而不是它的一半：（n-1）/2 呢？

请问老师，(P1-P0)/P0是不是return？老师为什么说等于return的变化（△R）呢？