Personal finance learning tool
Portfolio Duration Matching Calculator
Calculate the bond allocation needed to match a target liability duration with cash and bond assets.
Inputs and results stay in this browser. Currency symbols are illustrative; use any consistent currency.
Understand Portfolio Duration Matching
One idea, three depths
Choose how deeply to explain Portfolio Duration Matching
Portfolio Duration Matching: Calculate the bond allocation needed to match a target liability duration with cash and bond assets.
Age 5Explain it to a 5-year-oldStart with a picture
Imagine using Portfolio Duration Matching to answer this question: calculate the bond allocation needed to match a target liability duration with cash and bond assets? Enter Target liability duration, Available bond portfolio duration, Total assets assigned to liability, and 1 other input; the calculator shows Required bond portfolio allocation. Try changing one number and watch what happens to Required bond portfolio allocation. The answer tells you Required bond portfolio allocation.
Age 15Explain it to a 15-year-oldConnect it to the formula
Duration matching does not eliminate curve, inflation, credit, cash-flow timing or convexity risk. The rule is Bond allocation = target duration ÷ bond portfolio duration. Its input values are Target liability duration, Available bond portfolio duration, Total assets assigned to liability, Cash duration, and the main result is Required bond portfolio allocation. Try changing one number and watch what happens to Required bond portfolio allocation.
CollegeExplain it at college levelState the model precisely
This calculator evaluates a personal-finance model from stated cash amounts, rates and time assumptions. The implemented relation is Bond allocation = target duration ÷ bond portfolio duration, evaluated from Target liability duration, Available bond portfolio duration, Total assets assigned to liability, Cash duration to produce Required bond portfolio allocation. Duration matching does not eliminate curve, inflation, credit, cash-flow timing or convexity risk. The result cannot predict markets or include unentered taxes, fees, legal rules, benefits, insurance terms or personal circumstances. Verify material decisions against current documents.
What this personal finance tool does
Calculate the bond allocation needed to match a target liability duration with cash and bond assets.
Why the relationship works
Duration matching does not eliminate curve, inflation, credit, cash-flow timing or convexity risk.
The formula
Bond allocation = target duration ÷ bond portfolio duration
Inputs and time periods
This model uses Target liability duration, Available bond portfolio duration, Total assets assigned to liability, Cash duration. Keep currencies and time periods consistent, and distinguish current known amounts from assumptions about future rates.
What the result means
The primary output is Required bond portfolio allocation; supporting outputs include Required bond amount, Cash or short-duration amount. Compare scenarios by changing one input at a time.
Limits of this compact model
This educational calculator cannot predict markets or account for every tax, fee, legal rule, benefit, insurance policy or personal circumstance. Verify material decisions with current documents and qualified advice.
Supporting sourcesAcademic referencesPrimary standards, textbooks and complete citations
Standards, reading and academic references
Use the calculator as the worked interaction, then consult the primary standards and academic textbooks listed below. MW SysArc links to the original sources; the explanation on this page is original and does not reproduce them.
Principles of Finance
Read the free OpenStax finance textbookCite this book
- APA 7
- Dahlquist, J., & Knight, R. (2022). Principles of finance. OpenStax. https://openstax.org/books/principles-finance/pages/1-why-it-matters
- MLA 9
- Dahlquist, Julie, and Rainford Knight. Principles of Finance. OpenStax, 2022, https://openstax.org/books/principles-finance/pages/1-why-it-matters.
- Chicago author-date
- Dahlquist, Julie, and Rainford Knight. 2022. Principles of Finance. Houston, TX: OpenStax. https://openstax.org/books/principles-finance/pages/1-why-it-matters.
OpenStax entries are free to read online. Follow the licence shown on each linked source before redistributing or adapting its content.
Reuse the page responsiblyCite this pageAPA, MLA, Chicago, Harvard, BibTeX and RIS
These formats cite this calculator page itself. They are separate from the academic references above, which support the mathematical method and terminology.
APA 7
MW SysArc. (2026, July 21). Portfolio Duration Matching Calculator. MW SysArc Tools. https://finance.mwsysarc.com/portfolio-duration-matching
MLA 9
MW SysArc. “Portfolio Duration Matching Calculator.” MW SysArc Tools, 21 July 2026, https://finance.mwsysarc.com/portfolio-duration-matching. Accessed 31 Aug. 2026.
Chicago 17
MW SysArc. “Portfolio Duration Matching Calculator.” MW SysArc Tools. Published July 21, 2026. Accessed August 31, 2026. https://finance.mwsysarc.com/portfolio-duration-matching.
Harvard
MW SysArc (2026) ‘Portfolio Duration Matching Calculator’, MW SysArc Tools. Published 21 July 2026. Available at: https://finance.mwsysarc.com/portfolio-duration-matching (Accessed: 31 August 2026).
BibTeX and RIS records
BibTeX
@misc{mwsysarc_portfolio_duration_matching_2026,
author = {{MW SysArc}},
title = {Portfolio Duration Matching Calculator},
howpublished = {MW SysArc Tools},
year = {2026},
url = {https://finance.mwsysarc.com/portfolio-duration-matching},
note = {Published July 21, 2026; accessed August 31, 2026}
}RIS
TY - ELEC
AU - MW SysArc
TI - Portfolio Duration Matching Calculator
T2 - MW SysArc Tools
PY - 2026
DA - 2026-07-21
Y2 - 2026-08-31
UR - https://finance.mwsysarc.com/portfolio-duration-matching
N1 - Published July 21, 2026
ER -Clear answers
Frequently asked questions
What does the Portfolio Duration Matching do?
Calculate the bond allocation needed to match a target liability duration with cash and bond assets.
How does the Portfolio Duration Matching work?
The calculator applies Bond allocation = target duration ÷ bond portfolio duration. Duration matching does not eliminate curve, inflation, credit, cash-flow timing or convexity risk.
What can I learn from the Portfolio Duration Matching?
You will connect Target liability duration, Available bond portfolio duration, Total assets assigned to liability, Cash duration to Required bond portfolio allocation, then test how changing one assumption affects the financial decision.
Does MW SysArc receive or store what I enter?
No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.
How should I use the result?
Use the result as a planning reference, and review how income, expenses, irregular payments, rates and time periods were classified before making decisions.
Last reviewed . Calculations tested .