South African Reserve Bank Discusses Importance of Financial Stability for Economic Growth

The South African Reserve Bank (SARB) has announced its common scenario stress test (CSST) of the banking system, conducted every two years to assess potential losses and capital shortfalls in the banking sector. The CSST involves bottom-up and top-down approaches, with participating banks conducting internal models-based tests while the SARB conducts a simultaneous validation and benchmarking exercise. The 2023 CSST results indicated that banks are adequately capitalized and able to withstand economic disruptions. The SARB has also conducted an exploratory sensitivity stress test of the South African insurance industry in 2020/21 and the inaugural bottom-up insurance common scenario stress test (ICSST) in 2023/24.

The South African Reserve Bank's (SARB) common scenario stress test (CSST) has been conducted every two years to assess potential losses and capital shortfalls in the banking sector. The SARB's CSST is a critical component of its macroprudential policy framework, aimed at ensuring the stability of the financial system. This article provides an overview of the CSST process and highlights the key findings from the 2023 exercise.

The CSST is conducted on a bottom-up (BU) and top-down (TD) basis, with participating banks receiving scenarios to conduct BU stress tests based on their internal models. The SARB simultaneously conducts a TD stress test to validate and benchmark the results from each bank. The exercise includes sensitivity analyses intended to assess the effects of specific risk factors that might adversely affect the solvency position or liquidity profile of a financial institution.

The CSST is an essential tool for the SARB in assessing the resilience of the banking sector to severe and plausible scenarios over a three-year horizon. The exercise provides valuable insights into potential losses and capital shortfalls, enabling the SARB to take proactive measures to maintain financial stability. The results of the 2023 CSST indicated that banks are adequately capitalized and able to withstand economic disruptions.

The SARB's common scenario stress test is a critical component of its macroprudential policy framework, aimed at ensuring the stability of the financial system. Practitioners should note that individual bank results are not published, although sector-wide results are published in the SARB's Financial Stability Review. The SARB has also conducted an exploratory sensitivity stress test of the South African insurance industry and the inaugural bottom-up insurance common scenario stress test (ICSST) in 2023/24.