1. A method for updating a financial outcome of transactions involving pass-through securities, comprising the steps of: (a) searching a trade database for transactions involving pass-through securities having a computable present worth based on time-sensitive valuation data; (b) updating valuation data associated with pass-through securities found during the search of the trade database; and (c) computing a financial outcome of the transaction involving the pass-through found during the search of the trade database based on the updated valuation data.