The international Fisher effect is identified as part of the four-way equivalence model. This model outlines a relationship between exchange rates, interest rates and inflation rates. The international Fisher effect, specifically, states that the difference in interest rates between two countries is an indicator of the expected change in exchange rates of their currencies. The aim of this paper is to test the validity of the international Fisher effect between South Africa and the UK. The understanding of the exchange rate movements is vital for management decisions, investment activity and policy making for central banks and government. Data has been collected for a sampling period beginning in July 1995 and ending in April 2001. Interest rates in the UK and South Africa are recorded for this period. A record of exchange rate movements for the same period has also been compiled. Using this data, a simulation of an uncovered interest arbitrage was carried out. This was done by taking £100 from the UK, converting it to Rands and investing those Rands in a South African bank. At the same time, £100 was also invested in a UK bank. As interest accrued over the test period, interest rates in both countries changed, exchange rates fluctuated and the balance in the South African account was compared to the balance in the UK account. According to the model, the real balances in both the accounts should remain equivalent over the sampling period. It was found that interest rates in SA were higher, more volatile and less cyclic than those in the UK. As predicted by the model, the exchange rate (in R/£) constantly increased over the sampling period. Reasons for the higher interest rates in SA include a low national savings rate, high inflation, the South African economies vulnerability to events in the international market and the reserve bank's monetary policies. The simulated arbitrage was found to be profitless and the balances of the two simulated investment accounts were found to be statistically similar. There were, however, some short term deviations from the theory. The value of the SA account was lowest during times of high interest rates in SA, when there was volatility in the forex market and when the exchange rate was at peaks in the cycle. Nevertheless, the exchange rate - interest rate relationship always returned to equilibrium. The risk and unpredictability associated with the international market is high while only small chances exist to achieve economic gain from borrowing from low interest rate environments (or investing in countries where the interest rates are high). It was concluded that the international Fisher effect, between the UK and South Africa, for the period studied, had significant short term deviations but is valid over the medium term. The implication for business practice is that stakeholders should be conservative when faced with risk associated with foreign exchange exposure unless, as is the case with speculators, it is their core competence to predict macroeconomic trends and profit from beating the market. / Thesis (MBA)-University of Natal, Durban, 2001.

Thesis (M.Com. (Economics & Economic History)) - Rhodes University, 2006. / A thesis submitted in partial fulfilment of the requirements of the degree of Masters of Commerce in Financial Markets.

This thesis investigates the relationship between expected inflation and nominal interest rates in South Africa and the extent to which the Fisher effect hypothesis holds. The hypothesis, proposed by Fisher (1930), that the nominal rate of interest should reflect movements in the expected rate of inflation has been the subject of much empirical research in many industrialised countries. This wealth of literature can be attributed to various factors including the pivotal role that the nominal rate of interest and, perhaps more importantly, the real rate of interest plays in the economy. The validity of the Fisher effect also has important implications for monetary policy and needs to be considered by central banks. Few studies have been conducted in South Africa to validate this important hypothesis. The analysis uses the 3-month bankers’ acceptance rate and the 10-year government bond rate to proxy both short- and long-term interest rates. The existence of a long-run unit proportional relationship between nominal interest rates and expected inflation is tested using Johansen’s cointegration test. The data is analysed for the period April 2000 to July 2005 as the research aims to establish whether the Fisher relationship holds within an inflation targeting monetary policy framework. The short-run Fisher effect is not empirically verified. This is due to the effects of the monetary policy transmission mechanism and implies that short-term nominal interest rates are a good indication of the stance of monetary policy. A long-run cointegrating relationship is established between long-term interest rates and expected inflation. The long-run adjustment is less than unity, which can be attributed to the credibility of the inflation-targeting framework.