The collateral could be a number of things including mortgages--securitized mortgages that are risky and dangerous assets.

抵押品可是很多种东西,包括抵押贷款-证券化按揭贷款,这种有风险的，危险的资产。

耶鲁公开课 - 金融市场课程节选

The Fed is effectively just saying we'll take those assets as collateral for loans to you.

美联储有效率地说,我们将把那些资产视为你们贷款的抵押品。

耶鲁公开课 - 金融市场课程节选