答案解释一下，没看懂

NO.PZ201809170400000505 问题如下 Relative to Fun1, Chiyosenko’s new equity funwill most likely exhibit a lower: information ratio. iosyncratic risk. collaterrequirement. A is correct. the new funscales up active risk ubling active weights, it will faimplementation constraints thwill prevent it from increasing the weights of many of its short positions. The information ratio (IR) is finethe ratio of active return to active risk. If there were no constraints preventing the new funfrom scaling up active weights, it coulscale up active risk scaling up active weights, proportionally increase active return, ankeep the IR unchange Implementation constraints experiencethe new fun however, suthe cost anfficulty in borrowing securities to support the scaleup short positions, will prevent the active return from proportionally increasing with the active risk. Therefore, the IR woulmost likely lower for the new funthfor Fun1. the following chart illustrates, active risk is scaleup, implementation constraints create minishing returns to scale for active returns, theregrang the IR. 如题

NO.PZ201809170400000505 问题如下 Relative to Fun1, Chiyosenko’s new equity funwill most likely exhibit a lower: information ratio. iosyncratic risk. collaterrequirement. A is correct. the new funscales up active risk ubling active weights, it will faimplementation constraints thwill prevent it from increasing the weights of many of its short positions. The information ratio (IR) is finethe ratio of active return to active risk. If there were no constraints preventing the new funfrom scaling up active weights, it coulscale up active risk scaling up active weights, proportionally increase active return, ankeep the IR unchange Implementation constraints experiencethe new fun however, suthe cost anfficulty in borrowing securities to support the scaleup short positions, will prevent the active return from proportionally increasing with the active risk. Therefore, the IR woulmost likely lower for the new funthfor Fun1. the following chart illustrates, active risk is scaleup, implementation constraints create minishing returns to scale for active returns, theregrang the IR. 可以一下推导过程吗？

NO.PZ201809170400000505问题如下 Relative to Fun1, Chiyosenko’s new equity funwill most likely exhibit a lower: information ratio. iosyncratic risk. collaterrequirement. A is correct. the new funscales up active risk ubling active weights, it will faimplementation constraints thwill prevent it from increasing the weights of many of its short positions. The information ratio (IR) is finethe ratio of active return to active risk. If there were no constraints preventing the new funfrom scaling up active weights, it coulscale up active risk scaling up active weights, proportionally increase active return, ankeep the IR unchange Implementation constraints experiencethe new fun however, suthe cost anfficulty in borrowing securities to support the scaleup short positions, will prevent the active return from proportionally increasing with the active risk. Therefore, the IR woulmost likely lower for the new funthfor Fun1. the following chart illustrates, active risk is scaleup, implementation constraints create minishing returns to scale for active returns, theregrang the IR. 如题

NO.PZ201809170400000505问题如下 Relative to Fun1, Chiyosenko’s new equity funwill most likely exhibit a lower: information ratio. iosyncratic risk. collaterrequirement. A is correct. the new funscales up active risk ubling active weights, it will faimplementation constraints thwill prevent it from increasing the weights of many of its short positions. The information ratio (IR) is finethe ratio of active return to active risk. If there were no constraints preventing the new funfrom scaling up active weights, it coulscale up active risk scaling up active weights, proportionally increase active return, ankeep the IR unchange Implementation constraints experiencethe new fun however, suthe cost anfficulty in borrowing securities to support the scaleup short positions, will prevent the active return from proportionally increasing with the active risk. Therefore, the IR woulmost likely lower for the new funthfor Fun1. the following chart illustrates, active risk is scaleup, implementation constraints create minishing returns to scale for active returns, theregrang the IR. iosyncratic risk是不是可以理解为non systmatic risk

NO.PZ201809170400000505 iosyncratic risk. collaterrequirement. A is correct. the new funscales up active risk ubling active weights, it will faimplementation constraints thwill prevent it from increasing the weights of many of its short positions. The information ratio (IR) is finethe ratio of active return to active risk. If there were no constraints preventing the new funfrom scaling up active weights, it coulscale up active risk scaling up active weights, proportionally increase active return, ankeep the IR unchange Implementation constraints experiencethe new fun however, suthe cost anfficulty in borrowing securities to support the scaleup short positions, will prevent the active return from proportionally increasing with the active risk. Therefore, the IR woulmost likely lower for the new funthfor Fun1. the following chart illustrates, active risk is scaleup, implementation constraints create minishing returns to scale for active returns, theregrang the IR. 选择2是啥意思呢？谢谢