A number of distressed mortgage insurance companies with special covenants with state regulators and the government-sponsored enterprises are in danger of losing their ability to write new insurance as continued losses prevent them from meeting financial eligibility requirements. With credit trends further weakening in the second quarter, certain mortgage insurers, including Mortgage Guaranty Insurance Corp. and PMI Mortgage Insurance Co., could slip below minimum re-serve and surplus requirements, observers say. Already on capital-requirement waivers, the MIs could be ordered to stop ...