In March 2020, the Federal Reserve chose BlackRock to manage two corporate bond-buying programs in response to the coronavirus pandemic, the $500 billion Primary Market Corporate Credit Facility (PMCCF) and the Secondary Market Corporate Credit Facility (SMCCF), as well as purchase by the Federal Reserve System of commercial mortgage-backed securities (CMBS) guaranteed by Government National Mortgage Association, Federal National Mortgage Association, or Federal Home Loan Mortgage Corporation.[22][46][47]