请问interest expense和interest payment有什么区别

请问可以解释一下计算bond的BASE法则含义吗？

7. For portfolio managers of passive funds, market indexes are least useful as: A. proxies to measure systematic risk. B. benchmarks for portfolio performance attribution. C. tools to develop exchange-traded funds for non-accessible markets. 我选择的是C，可是答案却是B？

6. The index weighting that results in portfolio weights shifting away from securities that have increased in relative value toward securities that have fallen in relative value whenever the portfolio is rebalanced is most accurately described as: A. float-adjusted market-capitalization weighting. B. fundamental weighting. C. equal weighting. 为什么选择B

2. After the public announcement of the merger of two firms, an investor makes abnormal returns by going long on the target firm and short on the acquiring firm. This most likely violates which form of market efficiency? A. Semi-strong-form only B. Semi-strong-form and strong-form C. Weak-form and semi-strong-form 为什么不选择C

1. An informed trader buys a company’s stock. His close friends, who lack information or expertise, imitate his action and buy the stock. Which of the following statements concerning this behavioral bias is most accurate? It: A. is identical to representativeness. B. improves market efficiency. C. is inconsistent with rational behavior. 为什么B 是正确的？

Dark pools是指什么呢？

协方差covariance的算法可以再介绍下吗？有点看不懂公式

老师可以详细讲解下这个斜率吗。

老师，这个12次方计算器怎么按来开根号啊？