NovaStar Financial continues to operate, thanks in part to a portfolio of poorly performing subprime mortgages. In late 2007 and early 2008, the company ceased originations and sold its mortgage servicing rights, but NovaStar continues to receive income from securitized subprime mortgages and an appraisal services unit.NovaStar was the 19th-ranked subprime lender in 2006, according...