United Guaranty Residential Insurance Co. has agreed to be the exclusive provider of pool coverage for Delaware state housing authority loans. The partnership between the Greensboro, NC, mortgage insurer and the Delaware State Housing Authority would help provide affordable housing to low- and moderate-income state residents. Under an agreement, United Guaranty will provide coverage for the DSHA’s 2001 Series A Single Family Mortgage Revenue Bond Program, which funds mortgages through tax-exempt mortgage revenue bonds. United