The Supreme Court of the United States this week ruled in favor of Miami in a case involving losses the city claimed were related to “predatory mortgages.” The ultimate impact of the ruling remains unclear, as the lawsuits will proceed in a lower court, potentially fizzling out or leading to a plethora of similar claims. In Bank of America v. City of Miami, BofA and Wells Fargo challenged lawsuits brought under the Fair Housing Act. The city alleged that discriminatory conduct by the banks in their origination of predatory mortgages before the financial crisis led to a disproportionate number of foreclosures and vacancies in majority-minority neighborhoods. Miami said the loans and foreclosures impaired the city’s effort to assure racial integration, diminished its property-tax revenue and increased demand for police, fire and other municipal services. In a 5-3 ruling supported by the Supreme Court’s more liberal-leaning justices, the court determined...