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South African Inflation Modelling Under the HJM Framework

Inflation modelling is typically done following an econometric approach, however this results in models being constructed that are not consistent with the observable bond market and as such they cannot be used in hedging market instruments or in pricing inflation-linked derivatives. Jarrow and Yildi...

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Main Author: Rizzo, Massimo
Other Authors: Mahomed, Obeid
Format: Thesis
Language:English
Published: Department of Finance and Tax 2023
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access_status_str Open Access
author Rizzo, Massimo
author2 Mahomed, Obeid
author_browse Mahomed, Obeid
Rizzo, Massimo
author_facet Mahomed, Obeid
Rizzo, Massimo
author_sort Rizzo, Massimo
collection Thesis
description Inflation modelling is typically done following an econometric approach, however this results in models being constructed that are not consistent with the observable bond market and as such they cannot be used in hedging market instruments or in pricing inflation-linked derivatives. Jarrow and Yildirim (2003) were one of the first to propose a framework under which nominal and real forward rates and an inflation index could be jointly modelled in a consistent manner, based on the Heath-Jarrow-Morton (HJM) framework as first developed by Heath et al. (1992). They showed that under this framework it is possible to recover observed nominal and inflation-linked bond prices, hedge these instruments, and price related inflation-linked derivatives. A shortfall of this framework however, as critiqued by Mercurio (2005) and Belgrade et al. (2004), is that it depends entirely on non observable parameters. As such, estimating the parameters of a model constructed under this framework is non-trivial. This dissertation applies the approach detailed by Jarrow and Yildirim (2003) to construct a model that fits the South African context, and makes use of the Kalman filter, as originally documented by Kalman (1960), to overcome the issues that arise in parameter estimation. Using the model constructed, forecasts of future inflation in South Africa are produced.
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language eng
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provenance_str_mv Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository
publishDate 2023
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publishDateSort 2023
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publisherStr Department of Finance and Tax
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source_str UCTD — University of Cape Town Open Access Repository
spelling oai:open.uct.ac.za:11427/37775 South African Inflation Modelling Under the HJM Framework Rizzo, Massimo Mahomed, Obeid Mathematical Finance Inflation modelling is typically done following an econometric approach, however this results in models being constructed that are not consistent with the observable bond market and as such they cannot be used in hedging market instruments or in pricing inflation-linked derivatives. Jarrow and Yildirim (2003) were one of the first to propose a framework under which nominal and real forward rates and an inflation index could be jointly modelled in a consistent manner, based on the Heath-Jarrow-Morton (HJM) framework as first developed by Heath et al. (1992). They showed that under this framework it is possible to recover observed nominal and inflation-linked bond prices, hedge these instruments, and price related inflation-linked derivatives. A shortfall of this framework however, as critiqued by Mercurio (2005) and Belgrade et al. (2004), is that it depends entirely on non observable parameters. As such, estimating the parameters of a model constructed under this framework is non-trivial. This dissertation applies the approach detailed by Jarrow and Yildirim (2003) to construct a model that fits the South African context, and makes use of the Kalman filter, as originally documented by Kalman (1960), to overcome the issues that arise in parameter estimation. Using the model constructed, forecasts of future inflation in South Africa are produced. 2023-04-20T10:33:16Z 2023-04-20T10:33:16Z 2022 2023-04-20T08:33:02Z Master Thesis Masters MPhil http://hdl.handle.net/11427/37775 eng application/pdf Department of Finance and Tax Faculty of Commerce
spellingShingle Mathematical Finance
Rizzo, Massimo
South African Inflation Modelling Under the HJM Framework
thesis_degree_str Master's
title South African Inflation Modelling Under the HJM Framework
title_full South African Inflation Modelling Under the HJM Framework
title_fullStr South African Inflation Modelling Under the HJM Framework
title_full_unstemmed South African Inflation Modelling Under the HJM Framework
title_short South African Inflation Modelling Under the HJM Framework
title_sort south african inflation modelling under the hjm framework
topic Mathematical Finance
url http://hdl.handle.net/11427/37775
work_keys_str_mv AT rizzomassimo southafricaninflationmodellingunderthehjmframework