Ameriquest Mortgage has packaged the first mortgage-backed securities transaction supported exclusively by insured automated valuation model technology. “This is the first MBS that’s 100 percent backed by insured AVM,” said analyst Taruna Reddy at Moody’s Investors Service, which assigned a rating of Aaa to the senior certificates in Ameriquest Series 2003-IA1 securitization backed by fixed-rate subprime mortgages.