老师您好 47题 期货的规模就是一份期货所包含的青铜的规模吗 比如题目中一份期货的青铜规模是25 那么Qf就是25

请问老师，可以解释一下这道题和它的选项吗？谢谢

7.Which of the following is not an advantage of the originate-to-distribute (OTD) business model? A. Investors benefited from a wider array of investments, allowing them to diversify their portfolios and better synchronize their risk/return profiles with their goals and preferences. B. Credit risk is retained by banks on their balance sheets, along with the associated cash flows. C. Reduces the incentive for loan originators to monitor the creditworthiness of borrowers. D. Originators benefited from greater capital efficiency and enhanced funding opportunities.

这道题的答案是b，但我的问题是c选项也是不对的吧，c选项说的是otd model的缺点吧，题目问的是不是优点，那c选项为什么不能选

请问 C选项怎么理解的？谢谢

请问2.1%是年化的，为什么没有把它除以根号252呢？谢谢

请问A选项怎么理解的？怎么理解liquidity increases wehn overnight loans increase relative to vernight borrowing?谢谢

请老师再详细讲解下long currency forward contract=long foreign+short US T-bill+long foreign T-bill。谢谢了

请问这个empirical distributions exhibit fat tails指的是normal distribution吗

老师，这样表述：NII是利差的$形式，NIM是利差的%形式，对吗？