transparency of mortgage market

--Unlike the corporate bond market, which gained pricetransparency in 2002 when the SEC required dealers to reporttheir trades on a computer system called Trace, the asset-backeddebt market has no centralized network for disclosing prices. --Dealers saw their fees for corporate bond deals cut in halfthe year after Trace was introduced, according to a study lastyear published in the Journal of Financial Economics. --Day trader Richard Field in Needham, Massachusetts, says hispatent for tracking medical invoices can be adapted for mortgageinterest payments, helping banks better value securities derivedfrom home loans and other receivables. From its headquarters inNew York, accounting firm Deloitte & Touche LLP says it'sdeveloping computer models that will do the same.