Defaults on Some `Alt A' Loans Surpass Subprime Ones

By Jody Shenn
July 24 (Bloomberg) -- Defaults on some so-called Alt A mortgages packaged into bonds last year are now outpacing those from subprime loans, according to Citigroup Inc.

The three-month constant default rate for 2006 Alt A hybrid adjustable-rate mortgages is 2.3 percent, compared with 2.2 percent for subprime ARMs, New York-based Citigroup analysts led by Rahul Parulekar wrote in a July 20 report. The figures represent the percentage of balances in a mortgage-bond pool expected to default in the next year based on 90-day trends.
The speed at which Alt A hybrid ARMs are being paid off due to home sales or refinancing has also fallen to about the same level as for subprime ARMs, which typically prepay more slowly, the analysts said. Slower prepayments can make the same rates of defaults more damaging by leaving more of the initial balances outstanding to eat into bond-investor protections.

The combination of challenges mean 2006 bonds backed by Alt A mortgages, a credit grade above subprime loans, may need ``lower loss severities to still come out with lower cumulative losses than subprimes,'' the Citigroup analysts wrote.

More than $800 billion of subprime mortgage bonds and $700 billion of Alt A bonds are outstanding, with ARM bonds totaling more than $600 billion and $450 billion, respectively, according to a March report by Zurich-based Credit Suisse Group.