陈同学2024-09-24 20:11:34
课上说breakeven return 是刚好使得总没用等于standard fee 但是原版书课后题:To understand the effect each fee structure has on its respective portfolio, Porter and Smith must estimate the net active return for several possible gross active returns, including less than or equal to 0.20%, 0.75%, 1.25%, and 1.75%.Calculate the net active return based on each possible gross active return provid- ed using the selected data in Exhibit 1. Show your calculations. 这道题如果你把1.25%代入求出来的总费用应该是0.4625%而不是0.35%
回答(1)
KAIKAI2024-09-27 09:57:18
同学你好,这题我觉得是有问题的,数字应该没有编好。standard fee是当active return = breakeven active return=1.25%时的总费率(base fee+sharing fee),但这里算出来是不等的。而且他说在breakeven return的时候没有sharing fee也是有问题的,如果没有sharing fee, 那么standard fee应该和base fee一样。
按照我的理解,应该先把数字改成如下图所示。这题让你根据费率结构去计算各gross active return下对应的net active return(gross active return-fees)。
total fee = base fee+ sharing,最大费用不得超过0.9%。sharing是分享active return 超过base fee部分的20%。
total fee = 0.25% +(active return-0.25%)*20% = 0.2%+0.2*active return
当total fee = 0.9%时,active return = 3.5%,当active return>=3.5%,total fee就都为0.9%。
如果active return不超过3.5%的时候, net active return = active return -(0.2%+0.2*active return)= 0.8*active return - 0.2%。
因此,
当active return ≤0.25%时,net active return≤0.8*0.25%-0.2%=0.
当active return =0.75%时,net active return=0.8*0.75%-0.2% = 0.4%.
当active return =1.25%时,net active return=0.8*1.25%-0.2% = 0.8%.
当active return =1.75%时,net active return=0.8*1.75%-0.2% = 1.2%.
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