Buying them tends to push up the price; that tends to influence the yield down so it encourages a lower level of interest rate.

买进它们，导致价格上升；,导致参数降低,所以它鼓励一个低的利率水平。

耶鲁公开课 - 金融市场课程节选

rather than buying them purely as an investment. But again, that would be...

而不是纯粹为了投资。但是，那样的话……

关于购买艺术品 - SpeakingMax英语口语达人

I mean, you certainly could make a fortune buying them I mean, I'm certainly not telling you it's not going to work, but I think it's all risk-reward.

我的意思是，你很可能会通过它们赚很多钱,我是说，我肯定不会告诉你说,那一点也行不通，但我觉得高风险才有高回报。

耶鲁公开课 - 金融市场课程节选

The idea was that they would help advance the mortgage market by buying up mortgages from mortgage originators and therefore allowing them to make more mortgages.

其主旨就是通过,从抵押贷款的原始权益人手中,购买这些债权来促进市场的发展,那些原始权益人就可以去放更多的贷款

耶鲁公开课 - 金融市场课程节选