老师，你好，关于原版书reading 18的中的long/short strategy，这个策略对于active risk是如何影响的，是上升还是下降，能否解释下？另外，原版书是否有相关的解释？

请问为什么MP=AP时，AP最大呀？

老师好 what mitigations can be applied to solve liquidity concerns for emerging mkt credits? 什么会缓解发展中国家的流动性的问题？

从slowdown的invert到contraction的steep中间有flatten吗

老师好 固收百题case2第三题 difference 3 compared with developed mkts, the credit quality of emerging mkts issuers tends to be more concentrated at the very high and very low portions of the credit spectrum 是不对的. 但是理解起来 是不是 应该是 都concentrate在 very low portions? 还是别的理由？谢谢

您好，请问R1课本例题6中，求Sb1用的是什么方法？

R25的case1第2问为什么不选A:factor framework ? 文中说“Bragg notes that the fixed-income portfolio manager has strong views about the effects of macroeconomic factors on credit markets and follows a top-down investment process.”

您好，我想请问，正态分布下的几组k值，是标准正态分布下的吗？还是任何正态分布都可以用？

请问老师39的bc如何判断？还有为啥技术分析相比于短期来说更适合长期呢，长期不是应该逐渐回归资产价值嘛

请问老师37的bc为啥不对