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The impact of news on the South African sovereign bond market
Thesis (PhD (Financial Management Sciences))--University of Pretoria, 2022.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2023
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| _version_ | 1867613448036155392 |
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| access_status_str | Open Access |
| author2 | Brummer, L.M., 1940- |
| author_browse | Brummer, L.M., 1940- |
| author_facet | Brummer, L.M., 1940- |
| collection | Thesis |
| dc_rights_str_mv | © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD (Financial Management Sciences))--University of Pretoria, 2022. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/90028 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:18.085Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/90028 The impact of news on the South African sovereign bond market Brummer, L.M., 1940- ann.vanderwesthuizen@up.ac.za Van Schalkwyk, Cornelis Hendrik Van der Westhuizen, Elizabeth-Ann Reverse event study Headline news News classification GARCH models Machine-learning South African sovereign bond yield curve UCTD Thesis (PhD (Financial Management Sciences))--University of Pretoria, 2022. A reverse event study approach is used to investigate how the South African sovereign bond yield curve react to headline news. Abnormal return dates in the zero-coupon yields are identified using GARCH models on the daily return series and news items that are classified into categories using supervised machine learning. A regression model is fitted to determine the link between the abnormal daily returns and news categories. The results indicate that for abnormal increases in returns, indicating an increase in yield (negative news) the entire yield curve was impacted by political news and the medium term (5-year) was also impacted by international news. For abnormal decreases in returns, indicating a decrease in yields (positive news) political news had the greatest impact on the long end (15-and 20-year) of the yield curve, and economic news had the greatest impact on the medium term (10-year). Financial Management PhD (Financial Management Sciences) Unrestricted 2023-03-08T13:16:40Z 2023-03-08T13:16:40Z 2023 2022 Thesis * A2023 https://repository.up.ac.za/handle/2263/90028 https://doi.org/10.25403/UPresearchdata.21900771 en © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Reverse event study Headline news News classification GARCH models Machine-learning South African sovereign bond yield curve UCTD The impact of news on the South African sovereign bond market |
| title | The impact of news on the South African sovereign bond market |
| title_full | The impact of news on the South African sovereign bond market |
| title_fullStr | The impact of news on the South African sovereign bond market |
| title_full_unstemmed | The impact of news on the South African sovereign bond market |
| title_short | The impact of news on the South African sovereign bond market |
| title_sort | impact of news on the south african sovereign bond market |
| topic | Reverse event study Headline news News classification GARCH models Machine-learning South African sovereign bond yield curve UCTD |
| url | https://repository.up.ac.za/handle/2263/90028 https://doi.org/10.25403/UPresearchdata.21900771 |