From the article (emphasis added)

> The Fed said Thursday it will invest up to $2.3 trillion in loans to aid small and mid-sized businesses and state and local governments as well as fund the purchases of some types of high-yield bonds, collateralized loan obligations and commercial mortgage-backed securities.

The qualifier is the fallen angels clause which I mentioned. The way this works is that the Fed buys investment-grade ETFs. The underlying indices for those funds still have companies which have been downgraded to junk, which are the falled angels. The Fed isn't going out and purchasing bonds directly in the bond market, they're using existing infrastructure to perform market operations.