问题如下图：
选项：
A. 
B. 
C. 
解释：
请问一下，multi-factor 等同于diversified factor bets吗？还是factor neutral & diversified stock picks吗？有点区分困难。。。 另外，active share一定是高的吗？
谢谢您！
企鹅_品职助教 · 2019年03月17日
原版书上是这样描述 multi-factor products 的：
“most multi-factor products have a low concentration among securities, often holding more than 250 positions (the purpose of these products is to achieve a balanced exposure to risk factors and minimize idiosyncratic risks). They are diversified across factors and securities. Thus, they typically have a high Active Share, such as 0.70, but they have reasonably low active risk (tracking error), often in the range of ±3%.”
也就是说, factor和security都很diversified, active share很高，active risk相对较低.
diversified factor bets和factor neutral & diversified stock picks的区别在于，前者只有diversify factor, 后者factor和security都是diversified. 因此，multi-factor products更接近于factor neutral & diversified stock picks。
是的，active share一定是高的。
NO.PZ201809170400000603 问题如下 Ayanna Chen is a portfolio manager Aycrig Fun where she supervises assistant portfolio manager MorchGarciAycrig Funinvests money for high-net-worth aninstitutioninvestors. Chen asks Garcia to analyze certain information relating to Aycrig Funs three submanagers, Managers anC.Manager A h$250 million in assets unr management (AUM), active risk of 5%, information coefficient of 0.15, ana transfer coefficient of 0.40. Manager A’s portfolio ha 2.5% expecteactive return this year.Chen rects Garcia to termine the maximum position size thManager A cholin shares of Pasliant Corporation, whiha market capitalization of $3.0 billion, inx weight of 0.20%, anaverage ily trang volume (A) of 1% of its market capitalization.Manager A hthe following position size policonstraints:Allocation: No investment in any security mrepresent more th3% of totAUM.Liquity: No position size mrepresent more th10% of the llvalue of the security’s A.Inx weight: The maximum position weight must less thor equto 10 times the security’s weight in the inx.Manager B hol a highly versifieportfolio thhbalanceexposures to rewarrisk factors, high active share, ana relatively low active risk target.Selecteta on Manager C’s portfolio, whicontains three assets, is presentein Exhibit 1.Chen consirs aing a fourth sub-manager anevaluates three managers’ portfolios, Portfolios X, Y, anZ. The managers for Portfolios X, Y, anZ all have similcosts, fees, analpha skills, antheir factor exposures align with both Aycrig’s aninvestors’ expectations anconstraints. The portfolio factor exposures, risk contributions, anrisk characteristiare presentein Exhibits 2 an3.Chen anGarcia next scuss characteristiof long–short anlong-only investing. Garcia makes the following statements about investing with long–short anlong-only managers:Statement 1 A long–short portfolio allows for a gross exposure of 100%.Statement 2 A long-only portfolio generally allows for greater investment capacity thother approaches, particularly when using strategies thfocus on large-cstocks.Chen anGarcia then turn their attention to portfolio management approaches.Chen prefers approathemphasizes security-specific factors, engages in factor timing, antypically lea to portfolios thare generally more concentrateththose built using a systematic approach. Manager B’s portfolio is most likely consistent with the characteristiof A.pure inxer. B.sector rotator. C.multi-factor manager. C is correct. Most multi-factor procts are versifieacross factors ansecurities antypically have high active share but have reasonably low active risk (tracking error), often in the range of 3%. Most multi-factor procts have a low concentration among securities in orr to achieve a balanceexposure to risk factors anminimize iosyncratic risks. Manager B hol a highly versifieportfolio thhbalanceexposures to rewarrisk factors, a high active share, ana relatively low target active risk—consistent with the characteristiof a multi-factor manager. 书本上权重策略说了6种，是否可以按照已下归类Active risk 和Active share 都高concentratestopicks concentratefactor(也叫sector rotator)Active risk 低，active share 高versifiefactor(也叫multiple factor） neturfactor anversifestopicksAcitve riks 低，active share 低: closet inxing pure inxing另外，每一种策略是否有别名啊？
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NO.PZ201809170400000603 问题如下 Manager B’s portfolio is most likely consistent with the characteristiof A.pure inxer. B.sector rotator. C.multi-factor manager. C is correct. Most multi-factor procts are versifieacross factors ansecurities antypically have high active share but have reasonably low active risk (tracking error), often in the range of 3%. Most multi-factor procts have a low concentration among securities in orr to achieve a balanceexposure to risk factors anminimize iosyncratic risks. Manager B hol a highly versifieportfolio thhbalanceexposures to rewarrisk factors, a high active share, ana relatively low target active risk—consistent with the characteristiof a multi-factor manager. 请问老师sector rotator 代表上图里面的哪一种？
NO.PZ201809170400000603 问题如下 Manager B’s portfolio is most likely consistent with the characteristiof A.pure inxer. B.sector rotator. C.multi-factor manager. C is correct. Most multi-factor procts are versifieacross factors ansecurities antypically have high active share but have reasonably low active risk (tracking error), often in the range of 3%. Most multi-factor procts have a low concentration among securities in orr to achieve a balanceexposure to risk factors anminimize iosyncratic risks. Manager B hol a highly versifieportfolio thhbalanceexposures to rewarrisk factors, a high active share, ana relatively low target active risk—consistent with the characteristiof a multi-factor manager. 什么情况下Active Risk高而Active Share是低的？
NO.PZ201809170400000603问题如下 Manager B’s portfolio is most likely consistent with the characteristiof A.pure inxer.B.sector rotator.C.multi-factor manager. C is correct. Most multi-factor procts are versifieacross factors ansecurities antypically have high active share but have reasonably low active risk (tracking error), often in the range of 3%. Most multi-factor procts have a low concentration among securities in orr to achieve a balanceexposure to risk factors anminimize iosyncratic risks. Manager B hol a highly versifieportfolio thhbalanceexposures to rewarrisk factors, a high active share, ana relatively low target active risk—consistent with the characteristiof a multi-factor manager. 如题
