volatility of portfolio是什么意思，他与什么是相关的？

26. Which of the following would most likely signal that a company may be using aggressive accrual accounting policies to shift current expenses to later periods? Over the last five-year period, the ratio of cash flow to net income has: A. increased each year. B. decreased each year. C. fluctuated from year to year. 把现在的费用挪到后面去，那不是导致后面的费用越来越多吗？所以后面的净利润越来越低，到时CASH FLOW TO NET INCOME RATIO不是应该越来越大吗？

老师，29和30麻烦都解释一下，还有啥是 matrix pricing

106题的statement2 没听明白，请问是哪个知识点？

第八题都讲解呢？好像漏了

请问一下这里的break point和后面的breakeven point两者没有任何关系对嘛？不可以同义替换？

想问一下根据DOL的定义式的话，DOL不是也与FC和TVC有关嘛？

幸存者偏差是什么意思？视频没有讲

百题的进阶题的视频在哪里看？

BAR=BEY?