PURPOSE :
Many African countries struggle to sustain steady economic growth. Specific macro-economic factors can influence a country’s economic growth. We investigated the trend and influence of diaspora remittances, ...
Rusconi, Rob; Beyers, Frederik Johannes Conradie; Walters, Nadine(Actuarial Society of South Africa, 2023-12)
While insurers are not typically the most significant contributors to systemic risk, their actions and
behaviour may materially contribute to such risk. This study considers the models that may be used
to detect systemic ...
Levendis, Alexis; Mare, Eben(South African Statistical Association (SASA), 2023)
In this paper, we present a numerical method based on the fast Fourier transform
(FFT) to price call options on the minimum of two assets, otherwise known as
two-asset rainbow options. We consider two stochastic processes ...
Levendis, Alexis; Mare, Eben(Actuarial Society of South Africa, 2022)
It is well known that interest rate risk is a dominating factor when pricing long-dated contingent claims.
The Heston stochastic volatility model fails to capture this risk as the model assumes a constant interest
rate ...
Levendis, Alexis Jacques(University of Pretoria, 2023)
Stochastic volatility models have become immensely popular since their introduction in 1993 by Heston. This is because their dynamics are more consistent with market behaviour compared to the standard Black-Scholes model. ...
Venter, Pierre J.; Levendis, Alexis Jacques; Mare, Eben(Taylor and Francis, 2022)
In this paper, the generalised autoregressive heteroskedasticity (GARCH)
model is applied to the pricing of collateralised options in the South African equity
market. Symmetric GARCH and nonlinear asymmetric GARCH (AGARCH) ...
Levendis, Alexis Jacques; Mare, Eben(MDPI, 2022-11)
Spread options are notoriously difficult to price without the use of Monte Carlo simulation.
Some strides have been made in recent years through the application of Fourier transform methods;
however, to date, these methods ...
The rationale for the regulation of participants in financial markets, like retirement funds, is
sound. It would be strengthened, however, by a clear statement of the objectives of such
regulation. In this article the ...
Botha, Arno; Beyers, Conrad F.J.; De Villiers, Johan Pieter(Elsevier, 2021-09)
A novel procedure is presented for the objective comparison and evaluation of a bank’s decision rules in optimising the timing of loan recovery. This procedure is based on finding a delinquency threshold at which the ...
Venter, Pierre Johan(University of Pretoria, 2022)
In this thesis, the generalised autoregressive conditional heteroskedasticity (GARCH) option pricing model is applied to illiquid markets, volatility indices and in a modern derivative pricing framework. Chapter 2 provides ...
Taljaard, Byran Hugo; Mare, Eben(NISC Pty (Ltd) and Informa Limited (trading as Taylor and Francis Group), 2021)
This paper considers the recent underperformance of the equal weighted portfolio of South African Top 40 stocks relative to the market capitalisation weighted portfolio. It highlights the impact of the increased concentration ...
In this thesis, we investigate several methods for extracting the forecast distribution from historical asset returns and market-quoted option prices. Typically, risk-neutral distributions, extracted from market quoted ...
This thesis analyses the performance of the equal weighted portfolio using an approach from stochastic portfolio theory. This framework allows for the decomposition of the relative performance of the equal weighted portfolio ...
Van Appel, Vaughan; Mare, Eben(Academy of Science of South Africa, 2022-03)
An important topic for retirees is determining how much they can safely withdraw from their retirement
savings: draw too much from their retirement fund and risk outliving their retirement savings, or draw
too little and ...
It is widely noted that market capitalisation weighted portfolios are inefficient and underperform an equal weighted portfolio over the long-term. However, at least since 2016, an equal weighted portfolio of stocks in the ...
Beyers, Frederik Johannes Conradie; De Freitas, Allan; Essel-Mensah, Kojo Amonkwandoh; Seymore, Reyno; Tsomocos, Dimitrios P.(Wiley, 2022-03)
A computable general equilibrium (CGE) model is used as a regulatory tool for the banking sector in South Africa. The model is used to determine the effects of regulatory penalties, capital adequacy requirements (CAR) and ...
In this article a banking sector Computable general equilibrium (CGE) model for South Africa is developed. The model is used to estimate the potential effect of regulatory policy on the economy and as a risk assessment ...
Pretorius, Samantha(University of Pretoria, 2014-04-30)
The research attempts to resolve which method of estimation is the most consistent for the parameters of the earthquake model, and how these different methods of estimation, as well as other changes, in the earthquake model ...
De Witt, Corn e Juan(University of Pretoria, 2013)
This study provides systematic analysis of points of structural change in probability distributions.
In observed frequency data of earthquakes, such a threshold exists due to the non-detection of events
below a certain ...
The modelling technique known as Artificial Neural Networks (ANNs) is investigated. ANNs have the ability to detect and project non-linear relationships between variables. Further, they can adapt in dynamically changing ...