1983] RESIDENTIAL SEGREGATION ORDINANCES 321 housing units were available.197 Hence, the city exaggerated the shortage by demolishing many more houses than it created. "Blockbusting" was the answer. Economists have commented upon the difficulty of enforcing multi-party agreements in restraint of trade. The problem is simple: "The temptation of members to cheat is strong . . . because the returns from cheating are substantial. . . ,"198 This certainly proved to be true in Baltimore's housing industry. The treaty between white homeowners, the real estate industry, financiers, and the Federal Housing Administration had left unmet the demand for black housing. A house could be sold at a premium to a black buyer by a seller willing to violate the treaty. Moreover, this premium could be multiplied by real estate speculators who capitalized on the panic in white neighborhoods that had begun to change in racial make- up. Brokers bought whole blocks at a distress price from nervous white sellers, and sold at a premium to housing-hungry black buyers.199 Later, speculators broadened their market. They used their credit to borrow money from financial institutions. Turned-over houses were then sold on easy terms to low-income, high-risk black buyers pursuant to "buy-like-rent" contracts. The sales were often illusory, foreclosure was the rule rather than the exception. The speculator would sell and resell the same house to a series of buyers. By this technique the block- busters took a profit from the under-class as well as the middle-class Negroes. Blockbusting transferred tens of thousands of houses from the white market to the black market200 Blockbusting poses an ethical enigma. Its practitioners were out- laws, violating the real estate industry's code of ethics and cheating on the cartel between white homeowners, real estate dealers, mortgage lenders, city government, and the FHA, which restrained the sale or rental of housing to blacks in white neighborhoods. Speculators em- ployed a psychology designed to scare white homeowners out of their accumulated equities. They sold to black purchasers for whatever the market would bear, sometimes exacting exorbitant profits. Conversely, its practitioners were providing housing opportunities otherwise un- available to Negroes. And the "ethical" precept which they violated was part of a racist conspiracy. Speculators provided financing and housing when mortgage lenders and "ethical" real estate brokers re- - 197. Id. at 53-54. . ' • _ _ . 198. R. POSNER, ECONOMIC ANALYSIS OF LAW 115 (1572). 199. Douglas Connah. Jr., Run Baby, Run: Study of Blockbusting in Baltimore (Nov. 22, 1968) (unpublished manucript). 200. Set S. OLSON, supra note 8, at 378-79 (discussing career of Moms Goldseker).