Determinants of capital structure : an empirical study of South African financial firms

Abstract

The main objective of the thesis was to investigate the factors that determine capital structures of financial firms using two separate samples of banks and insurance companies. In the first instance, the results of the study showed that the financing behaviour of banks mirrors that of non-financial firms. It was also observed bank financing behaviour can be best explained by the pecking order theory. Risk and size variables were observed to be negatively related to the Tier 1 regulatory capital ratio, whereas the dividend variable was positively related. Similarly, risk and size were found to be negatively associated with buffer capital, while dividends were positively related. The 2007–2009 global financial crisis (GFC) was found to have negatively affected the financial structures of banks. Consistent with similar studies, it was observed that banks have a target capital structure, and adjust to this target at an adjustment speed of 44%. With regard to insurance companies, it was observed that the firm-level determinants of capital structure explain insurer leveraging. Unlike banks, the 2007–2009 GFC positively affected the capital structure of insurance companies. Similar to banks, results showed that insurers have target capital structures which they seek to achieve in their financing and adjust to such targets at a rate of 21%, which is lower than that of banks. The study contributes to the body of knowledge in four major ways. Firstly, it adds to the literature on the capital structure of financial firms, which area has not been extensively and conclusively studied. Using a different environment, it validates the ‘standard corporate finance view’ as has been observed in the few studies on financial firms. Secondly, it validates the ‘buffer view’ and ‘regulatory view’ of capital structures of financial firms that have taken prominence since the last GFC. Thirdly, the study recognises that banks and insurance companies are fundamentally different with regard to capital structure and regulation and therefore warranted separate treatment in studies. This is in contrast with recent studies that do not recognise the heterogeneity of the two types of firms. Fourthly, to the researcher’s knowledge this study is the first to examine the impact of business cycles/financial crises on the financing patterns of financial firms. Confirming the fundamental differences between banks and insurance companies, the study observed that financial crises have a negative impact on capital structures of banks (meaning that they deleverage during crises). In contrast, financial crises have a positive impact on capital structures of insurance companies (meaning, unlike banks, they leverage during crises).