Their efforts were buttressed by the federal government. In 1934, Congress created the Federal Housing Administration. The FHA insured private mortgages, causing a drop in interest rates and a decline in the size of the down payment required to buy a house. But an insured mortgage was not a possibility for Clyde Ross. The FHA had adopted a system of maps that rated neighborhoods according to their perceived stability. On the maps, green areas, rated “A,” indicated “in demand” neighborhoods that, as one appraiser put it, lacked “a single foreigner or Negro.” These neighborhoods were considered excellent prospects for insurance. Neighborhoods where black people lived were rated “D” and were usually considered ineligible for FHA backing. They were colored in red. Neither the percentage of black people living there nor their social class mattered. Black people were viewed as a contagion. Redlining went beyond FHA-backed loans and spread to the entire mortgage industry, which was already rife with racism, excluding black people from most legitimate means of obtaining a mortgage.