There are two main doctrines on the legal character of securities counter-purchase: doctrine of collateral loan and doctrine of conditional sale .
关于证券回购的法律性质，主要有抵押贷款说和附条件买卖说等两种做法和观点。
2
Taking the conditional value at risk (CVaR) as risk management index, DistCos purchase allocation among multi electricity trading markets is studied.
采用条件风险价值理论研究供电公司在多个电力交易市场中的最优购电分配策略。
3
An Agreement of Purchase and Sale for a particular property which is conditional (becomes binding) upon the failure of another Agreement for the same property.