The subprime wholesale sector had an unexpected champion in early 2004: retail powerhouse Ameriquest Mortgage. According to a new analysis by Inside B&C Lending, Ameriquest grew its wholesale business by a robust 246.3 percent, on an annual basis, during the first quarter. The $9.33 billion in new loans the company generated through its Argent Mortgage and Olympus Mortgage subsidiaries was good for a 12.8 percent market share. Significantly, wholesale