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。

youdao

There are two main doctrines on the legal character of securities counter. purchase: doctrine of collateral loan and dextrine 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。

youdao

Unlike physical music CDs, Judge Richard Sullivan ruled that the "first sale doctrine" did not apply.

BBC: Redigi screengrab

This is now known as the first-sale doctrine and generally applies to U.S.-made products.

FORBES: Legality Of Selling Used Items

Historically, the first sale doctrine has provided strong rights to owners of legitimately purchased copyrighted works.

FORBES: Are We All Copyright Infringers?