[DiogenesKynikos]

The most obvious illustration of this is the jump in junk-bond ETFs after the Fed began buying up junk bonds.[1]

The Fed is supporting the price of dubious, high-yield corporate debt. Whether or not that's good for the economy is a separate question, but it's not as if the Fed is just replacing assets with cash at 1:1 value. It is encouraging lending to risky enterprises, by itself taking on the risk.

1. https://www.ft.com/content/19e47570-ba23-4929-988e-9b5f468b2...

[RobertoG]

That could be true, but one thing is that the way (or some of the ways) the money is added to the economy is dubious and another that nothing should be done.