Fulfilling the Promise of the Housing Trust Fund Act This bill specifies that amounts received from fee increases on mortgage-backed securities guaranteed by the Federal National Mortgage Association (Fannie Mae) or participation certificates guaranteed by the Federal Home Loan Mortgage Corporation (Freddie Mac) on or after October 1, 2021, must be deposited into the Housing Trust Fund, which is dedicated to producing and preserving affordable housing. Such amounts shall be available without further appropriation.