Rachel2019-11-30 23:10:29

老师，能否详细解释一下书本151页，第十三题答案是什么意思？This results from the fact that the factors typically represent what is referred to as a zero (dollar) investment or self- financing investment, in which the underperforming attri-bute is sold short to finance an offsetting long position in the better- performing attribute. Constructing factors in this manner removes most market expo-sure from the factors (because of the offsetting short and long positions)不太理解？为什么会和zero investment，self-financial investment long/short 有关系？