曹同學
2024-04-15 11:43老師,第七題所說的active share變動是在組合層面的,而不是組合內active weights之間的調整。那組合層面的怎么理解呢?比如石油增1%,石化減1%,這種情況是內部相互抵消沒有增減,或者跨行業(yè)抵消無增減。
所屬:CFA Level III > Equity Portfolio Management 視頻位置 相關試題
來源: 視頻位置 相關試題
1個回答
Simon助教
2024-04-15 13:21
該回答已被題主采納
同學,上午好。
1. 個股調整是影響的active share。
2. active risk是衡量portfolio和benchmark的偏離程度的,簡單來說,portfolio和benchmark越不像,active risk就越大。
那么中石油增加1%,中石化減少1%,雖然active share 增加,但是都是石油行業(yè),這種改變,是認為benchmark和portfolio依然是非常像的,所以active risk認為變化很小。
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追問
那這原版書答案的第一句話是什么意思呢?也就是說個股active shares持倉變化會影響組合整體持倉變化?
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追答
Fund 3 held active positions in two automobile stocks—one was overweight by 1 percentage point (pp), and the other was underweight by 1pp.(原本有1% active share)
Fund 3 traded back to benchmark weights on those two stocks. (然后調到和benchmark一眼,此時active share=0)
In the second trade, Fund 3 selected two different stocks that were held at benchmark weights, one energy stock and one financial stock. Fund 3 overweighted the energy stock by 1pp and underweighted the financial stock by 1pp. (然后又把active share 變?yōu)?%)
所以這幾步交易后,active share=1%,和一開始是一樣的 -
追問
這兩個交易不一樣啊,第一個是同行業(yè),交易最后回歸,所以沒有變化。第二個跨行業(yè)交易,并沒有回歸基準
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追答
同學,上午好。
第一筆交易是:Fund 3 held active positions in two automobile stocks—one was overweight by 1 percentage point (pp), and the other was underweight by 1pp.(原本有1% active share)
然后第二筆交易是:
Fund 3 traded back to benchmark weights on those two stocks. (然后調到和benchmark一眼,此時active share=0)
In the second trade, Fund 3 selected two different stocks that were held at benchmark weights, one energy stock and one financial stock. Fund 3 overweighted the energy stock by 1pp and underweighted the financial stock by 1pp. (然后又把active share 變?yōu)?%)
舉個例子,benchmark是工商銀行40%,建設銀行40%,20%陜西煤業(yè),20%愛美客。
portfolio先是工商銀行39%,建設銀行41%,20%陜西煤業(yè),20%愛美客。那么有1%的active share
然后portfolio把銀行調回benchmark,但陜西煤業(yè)和愛美客持倉變了,然后工商銀行40%,建設銀行40%,19%陜西煤業(yè),21%愛美客。那么還是有1%的active share
