1. A machine configured to transform digital data into digital output data, the machine including: a digital electrical computer, an output device in communication with the computer, and a memory storing executable instructions which, when executed by the computer, program the machine to perform the operations of: accessing digital data relating to a bond indenture, the data including terms of a bond indenture, the terms including identity of a bond subject to the bond indenture, an identity of an issuer of the bond, an identity of at least one original investor in the bond and an amount of the bond held by the at least one original investor, and terms of an agreement with the at least one original investor, wherein the issuer of the bond is obligated to pay the investor a contingent liability if a specified event associated with the investor occurs, and receiving and storing market data so that the market data corresponds to at least some terms of the bond indenture, the contingent liability associated with the at least one original investor, and the specified event associated with the at least one original investor; processing to transform some of said data into digital output data in determining a scheduled investor payment amount by the issuer of the bond, a scheduled investor payment amount to the at least one original investor in the bond, an amount of the contingent liability associated with the at least one original investor in the bond, whether there has been an occurrence of the specified event associated with the at least one original investor in the bond, and, if an occurrence is determined, an amount to be paid to the at least one original investor; storing the digital output data; and outputting, at the output device, the digital output data comprising at least one of the scheduled investor payment amount by the issuer of the bond, the scheduled investor payment amount to the at least one original investor in the bond, the amount of the contingent liability associated with the at least one original investor in the bond, and if the occurrence is determined, the amount to be paid to the at least one original investor in the bond.