这也能行？这不是目无国会嘛，我要和POWELL单挑！
In addition, the Fed has got round an act that prevents it buying corporate
bonds through the establishment of a special purpose vehicle that will buy
the debt of companies rated BBB (just above junk status) or better. https://www.theguardian.com/business/2020/mar/23/the-fed-is-running-out-of-
options-to-stave-off-a-coronavirus-depression
