ShirleyWan
2022-05-26 01:43L3V3 P202. I'd like to ask something about the tracking error and transaction cost. (1) If the tracking error measures the divergence in portfolio price and benchmark price, does that mean whatever causes the price difference could affect the tracking error? (2) In the diagram, why is the "tracking error gross of trading cost" continuously declining when both tracking error and transaction cost are increasing? (3) How to guarantee a convex U-shape but not a concave U-shape? If the first security purchased for the portfolio is illiquid, then transaction cost dominates and tracking error should increase.
所屬:CFA Level III > Equity Portfolio Management 視頻位置 相關(guān)試題
來(lái)源: 視頻位置 相關(guān)試題
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開(kāi)開(kāi)助教
2022-05-26 15:29
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同學(xué)你好,
(1)可以這么理解,tracking error就是σ(Rp-Rb)。
(2)假設(shè)一個(gè)指數(shù)成分股數(shù)量非常多(例如1000只),如果不考慮跟蹤指數(shù)的交易成本,那么組合持有的成分股數(shù)量越多,和指數(shù)持股越接近,跟蹤指數(shù)的效果越好,tracking error越低。
但是,如果把交易成本考慮進(jìn)去,組合持有持有的成分股越多(這里的假設(shè)是持有的成分股越多,就會(huì)持有越多的流動(dòng)性較差的股票),交易成本增加的也越多,使得tracking error增加。
因?yàn)檫@里的假設(shè)就是先買liquid的security,再move to the leaset liquid stock,因此是這樣的曲線形狀。
【點(diǎn)贊】喲~。加油,祝你順利通過(guò)考試~
