A new breed of hybrid option ARMs with fixed interest rates has made it into the securitzation market – a sign that it is likely here to stay. “The performance of these mortgage loans may be significantly different than mortgage loans that fully amortize or have other negative amortization features that are more common to the marketplace,” said Bear Stearns in the offering prospectus for its $981.6 million Mortgage Funding Trust 2006-AR1 transaction...