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 ...
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 ...
Botha, Arno; Beyers, Conrad F.J.; De Villiers, 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 ...
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 ...
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 ...
Van Appel, Vaughan; Mare, Eben(South African Statistical Association, 2020)
The forward-looking nature of option prices provides an appealing way to extract risk measures. In this paper, we extract forecast densities from option prices that can be used in forecasting risk measures. More specifically, ...
Conradie, Dirk Cornelis Uys(University of Pretoria, 2020)
Banks are key to a well-functioning economy. Periods of economic stress could put banks and therefore the financial system at risk so regulators such as the Prudential Authority in South Africa need to know if banks are ...
Venter, Pierre Johan; Mare, Eben; Pindza, Edson(Cogent OA, 2020)
In this paper, two univariate generalised autoregressive conditional heteroskedasticity (GARCH) option pricing models are applied to Bitcoin and the
Cryptocurrency Index (CRIX). The first model is symmetric and the other ...
Age estimation in living individuals around the age of 18 years remains a difficult challenge. In this study, the anterior inferior vertebral ring apophysis development of cervical vertebrae C2, C3, and C4 of 496 white and ...
Smart, Hiske; AlGhareeb, Ahmed Mohamed; Smart, Sally-Anne(Lippincott, Williams and Wilkins, 2019-07)
BACKGROUND : The Kingdom of Bahrain has a high incidence of diabetes and associated foot complications. Simultaneously, low 25-hydroxyvitamin D (25[OH]D) levels are common in this population and may be associated with the ...
Social unrest, terrorism and other forms of political violence events are highly unpredictable. These events are driven by human intent and intelligence, both of which are extremely difficult to model accurately. This has ...
Van Appel, Vaughan; Mare, Eben(Operations Research Society of South Africa, 2018-11-04)
Recently, Ross derived a theorem, namely the “Recovery Theorem”, that allows for the recovery of the pricing kernel and real-world asset distribution, under particular assumptions, from a forward-looking risk neutral ...