风险内生于人们的社会、经济活动，人们的风险偏好随财富同方向变化。
Risk, following the society wealth' s steps, is born within the social and economic activities.
延迟支付使得供应链的效率和竞争力减弱，减弱的程度与货款支付的周期同方向变化。
Delay in payment weakened the supply chain efficiency and competitiveness. The extent of reduction changes in the same direction with the period of payment.
然后引入无差异曲线来说明市场中证券期望收益率同方向变化且变化值相差不大时，不必改变证券组合。
Meanwhile the indifference curve also shows that it is not neccessary to change the security combination when such changes in return possess similarity.
应用推荐