# US 8,571,976 B1 · Methods, software programs, and systems for managing one or more liabilities > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,571,976 B1 - Document ID: US8571976B1 - Status: Granted - Kind: B1 - Application number: 10/102,248 - Filed: 2002-03-20 - Granted: 2013-10-29 - Earliest claimed: 2000-11-28 - Assignees: Goldman, Sachs & Co. - Applicants: George H. Butcher, III - Inventors: George H. Butcher, III - Web page: https://patentgrep.com/patent/US8571976B1 ## CPC - G06Q 40/10: Tax strategies - G06Q 40/02: Banking, e.g. interest calculation or account maintenance (credit or loans G06Q40/03) - G06Q 40/03: Credit; Loans; Processing thereof - G06Q 40/04: Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange - G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR ## Abstract The present invention relates to various methods, software programs, and systems for managing one or more liabilities. More particularly, certain embodiments of the present invention relate to methods, software programs, and systems for managing debt in the form of at least one credit issued by a borrower. ## Claims ### Claim 1 A method implemented by a programmed computer system for managing debt issued by a borrower, comprising: obtaining, with the computer system, an expected principal amortization period associated with a first credit, the first credit issued by a borrower and included in a debt; adjusting, with the computer system, the expected principal amortization period associated with the first credit, said adjustment of the expected principal amortization period associated with the first credit resulting in an extension of the expected principal amortization period associated with the first credit; and applying, during a time period when a benchmark interest rate is below a predetermined interest rate level, at least part of an amount made available from the adjustment made with the computer system to at least partially defease a second credit, wherein the second credit is issued by the borrower and included in the debt. ### Claim 2 (depends on 1) The method of claim 1, whereby a credit rating of the first credit is not adversely affected. ### Claim 3 (depends on 1) The method of claim 1, wherein at least part of the amount made available from the adjustment made with the computer system is applied to at least partially defease the second credit when a yield on the second credit is above a yield on the first credit. ### Claim 4 (depends on 1) The method of claim 1, wherein at least part of the amount made available from the adjustment made with the computer system is applied to at least partially defease the second credit when the second credit is then callable. ### Claim 5 (depends on 1) The method of claim 1, wherein the first credit and the second credit are issued at different times. ### Claim 6 (depends on 1) The method of claim 1, wherein the first credit and the second credit are issued at substantially the same time. ### Claim 7 (depends on 1) The method of claim 1, wherein at least one of the first credit and the second credit is a bond. ### Claim 8 (depends on 7) The method of claim 7, wherein at least one of the first credit and the second credit is a municipal bond. ### Claim 9 (depends on 1) The method of claim 1, wherein applying at least part of the amount made available from the adjustment made with the computer system to at least partially defease the second credit is obligated. ### Claim 10 (depends on 9) The method of claim 9, wherein the obligation results from at least one of (a) a pattern of the borrower; (b) a practice of the borrower; and (c) an understanding between the borrower and another party. ### Claim 11 (depends on 10) The method of claim 10, wherein the understanding is between a credit rating entity. ### Claim 12 (depends on 1) The method of claim 1, wherein the first credit is selected from the group consisting of: (a) a single issue variable rate demand bond; and (b) a series of variable rate demand bonds. ### Claim 13 (depends on 1) The method of claim 1, wherein an overall average maturity of the debt is not extended. ### Claim 14 (depends on 1) The method of claim 1, wherein the benchmark interest rate is a short-term tax exempt rate. ### Claim 15 A processor-implemented method for managing borrower-issued debt, comprising: electronically obtaining an expected principal amortization period associated with a first credit issued by a borrower, wherein the first credit is included as debt; processor-adjusting the expected principal amortization period associated with the first credit, said adjustment of the expected principal amortization period associated with the first credit resulting in an extension of the expected principal amortization period associated with the first credit; and electronically applying, during a time period when a benchmark interest rate is below a predetermined interest rate level, at least part of an amount made available from the adjustment to at least partially defease a second credit when a yield on the second credit is above a yield on the first credit and the second credit is callable, wherein the second credit is issued by the borrower and included in the debt. ### Claim 16 (depends on 15) The processor-implemented method of claim 15, wherein an overall average maturity of the debt is not extended. ### Claim 17 (depends on 15) The processor-implemented method of claim 15, wherein the benchmark interest rate is a short-term tax exempt rate. ### Claim 18 A method implemented by a programmed computer system for managing debt issued by a borrower, comprising: obtaining, with the computer system, an expected principal amortization period associated with a first credit, the first credit issued by a borrower and included in a debt, wherein the first credit is a series of variable rate demand bonds; adjusting, with the computer system, the expected principal amortization period associated with the first credit, said adjustment of the expected principal amortization period associated with the first credit resulting in an extension of the expected principal amortization period associated with the first credit; and applying, when a yield on the second credit is above a yield on the first credit, at least part of an amount made available from the adjustment made with the computer system to at least partially defease a second credit, wherein the second credit is issued by the borrower and included in the debt, wherein the second credit forms a variable rate credit, wherein the first and second credits are issued at different time, wherein applying at least part of the amount made available from the adjustment made with the computer system to at least partially defease the second credit is obligated, wherein the obligation result from a practice of the borrower.