为什么低相关性，反而active risk会提高

NO.PZ201809170400000506问题如下 a result of Fun3’s two tras, the portfolio’s active risk most likely: crease remaineunchange increase C is correct. Active risk is affectethe gree of cross-correlation. The correlation of two stocks in fferent sectors is most likely lower ththe correlation of two stocks in the same sector. Therefore, the correlation of the energy/financipair is most likely lower ththof the automobile/automobile pair. Because both positions were implementeoverweight anunrweight, the lower correlation of the two stocks in the new position shoulcontribute more to active risk ththe two-stoposition thit replace 为什么相关系数低，active risk低

NO.PZ201809170400000506 问题如下 a result of Fun3’s two tras, the portfolio’s active risk most likely: crease remaineunchange increase C is correct. Active risk is affectethe gree of cross-correlation. The correlation of two stocks in fferent sectors is most likely lower ththe correlation of two stocks in the same sector. Therefore, the correlation of the energy/financipair is most likely lower ththof the automobile/automobile pair. Because both positions were implementeoverweight anunrweight, the lower correlation of the two stocks in the new position shoulcontribute more to active risk ththe two-stoposition thit replace 不同的行业不是应该越分散，越和benchmark像吗（B就是更分散）？为何不能从这个角度理解呢？

NO.PZ201809170400000506 问题如下 a result of Fun3’s two tras, the portfolio’s active risk most likely: crease remaineunchange increase C is correct. Active risk is affectethe gree of cross-correlation. The correlation of two stocks in fferent sectors is most likely lower ththe correlation of two stocks in the same sector. Therefore, the correlation of the energy/financipair is most likely lower ththof the automobile/automobile pair. Because both positions were implementeoverweight anunrweight, the lower correlation of the two stocks in the new position shoulcontribute more to active risk ththe two-stoposition thit replace 关于tra 1相同行业的两支股票，一个多买1%，另一个少买1%。如果portfolio 和benmarket 只点不同。那么active risk 应该是很小的，而active share应是 1%？这么理解对吗

NO.PZ201809170400000506 问题如下 a result of Fun3’s two tras, the portfolio’s active risk most likely: crease remaineunchange increase C is correct. Active risk is affectethe gree of cross-correlation. The correlation of two stocks in fferent sectors is most likely lower ththe correlation of two stocks in the same sector. Therefore, the correlation of the energy/financipair is most likely lower ththof the automobile/automobile pair. Because both positions were implementeoverweight anunrweight, the lower correlation of the two stocks in the new position shoulcontribute more to active risk ththe two-stoposition thit replace reviews quarterly holngs reports for Fun3. In comparing the two most recent quarterly reports, he notices fferences in holngs thincate thFun3 executetwo tras, with eatra involving pairs of stocks. Initially, Fun3 helactive positions in two automobile stocks—one woverweight 1 percentage point (pp), anthe other wunrweight 1pp. Fun3 trabato benchmark weights on those two stocks. In the secontra, Fun3 selectetwo fferent stocks thwere helbenchmark weights, one energy stoanone financistock. Fun3 overweightethe energy sto1pp anunrweightethe financisto1pp.我看老师说行业集中度的解答是理解的，但是这一段怎么体现通过主动调仓来实现行业集中度的变化？