The delinquency rate on subprime mortgages at the end of 2011 hit levels not seen since 2008, but analysts warn that subprime performance could worsen as borrowers are unable to refinance and negative equity increases. The seasonally adjusted delinquency rate for subprime mortgages fell to 20.8 percent at the end of 2011, according to the Mortgage Bankers Association. The rate has declined in each of the past seven quarters from a peak of 27.2 percent in the first quarter of 2010. However, a number of factors suggest that delinquency rates on non-agency mortgages will increase ...