Do Monetary Policy Announcements Affect Exchange Rate Returns and Volatility of Returns? Some Evidence from High‐Frequency Intra‐Day South African Data

This paper examines the temporal effect of domestic monetary policy surprises on both returns and volatility of returns of the South African rand/U.S. dollar exchange rate. The analysis in this “event study” proceeds using intra‐day minute‐by‐minute exchange rate data, repo rate data from the South African Reserve Bank's scheduled monetary policy announcements, and market consensus repo rate forecasts. A carefully selected sample over the period August 2003 to November 2017 ensures that the change in monetary policy is exogenous to the exchange rate. We find statistically and economically significant responses in intra‐day high‐frequency South African rand/U.S. dollar exchange rate returns and volatility of exchange rate returns to domestic interest rate surprises, but anticipated changes have no bearing on exchange rate returns and their volatility. The empirical results also indicate that there is an instantaneous response of the rand/dollar exchange rate to monetary policy surprises and that monetary policy news is an important determinant of the exchange rate until at least 42 minutes after the pronouncement – suggesting a high degree of market “efficiency” in its mechanical sense (although not necessarily in the deeper economic‐informational sense) in processing this information. Essentially, the asymmetric GARCH results exhibit no leverage effects – positive and negative information shocks have symmetric effects on conditional variance.     

Interest Rate Pass‐Through in Mongolia

This study empirically examines the interest rate pass‐through of the money market interest rate to bank lending and bank deposit interest rates in Mongolia using both linear and nonlinear autoregressive distributed lag (ARDL) models. The results from the empirical analysis using data from December 2002 to September 2015 suggest that interest rate pass‐through is generally weaker, slower, and asymmetric in Mongolia. The new findings provide evidence that: (i) interest rate pass‐through has improved over time; (ii) the bank deposit rate has a higher long‐run interest rate pass‐through and slower adjustment than the bank lending rate; and (iii) there is a negative long‐run asymmetric pass‐through with respect to the bank lending rate and a positive long‐run asymmetric pass‐through with respect to the bank deposit rate.     

Output Growth and its Volatility: The Gold Standard through the Great Moderation

This study examines the relationship between U.S. output growth and its volatility over the period 1876:I to 2012:II. We adjust the data for outliers and structural breaks. We employ generalized autoregressive conditional heteroskedasticity (GARCH) and exponential GARCH (EGARCH) specifications. Normality and homoskedasticity appear only in the GARCH or EGARCH model that corrects for the outliers. When including the break in the mean equation, high volatility persistence remains. After also accommodating the breaks in the variance equation, the integrated GARCH effect proves spurious, either for the symmetric or the asymmetric model. Finally, our empirical results suggest that the finding of higher output growth volatility stimulating output growth and higher output growth reducing its volatility obtained from the symmetric GARCH‐in‐mean (GARCH‐M) model also proves spurious as a result of the emergence of an asymmetric effect. Our more appropriately specified asymmetric EGARCH‐M model suggests positive volatility‐in‐mean and level effects in the long‐period real gross national product series.     

EXCHANGE RATE PASS‐THROUGH TO IMPORT PRICES IN SOUTH AFRICA: IS THERE ASYMMETRY?1

This paper examines the magnitude and speed of exchange rate pass‐through (ERPT) to import prices in South Africa. It further explores whether the direction and size of changes in the exchange rate have different pass‐through effects on import prices, i.e. whether the exchange rate pass‐through is symmetric or asymmetric. The findings of the study suggest that ERPT in South Africa is incomplete but relatively high. Furthermore, ERPT is found to be higher in periods of rand depreciation than appreciation, which supports the binding quantity constraint theory. There is also evidence to suggest that pass‐through is slightly higher in periods of small changes than large changes in the exchange rate in harmony with the menu cost theory when the invoices are denominated in the exporters' currency.     

Interest Rate Pass-through in a Dual-track System： Evidence from China

Using the Phillips-Loretan approach, this paper verifies the degree and speed of pass- through and rigidity of different interest rates in China, as well as the response of private loan interest rates to other interest rates during 2002-2012. The results indicate that the long-term pass-through from the interbank offered rates and deposit and loan interest rates to the treasury bond rate is incomplete, but that the long-term pass-through to private loan interest rates is overshooting. The long-term pass-through from the deposit and loan interest rates to the overnight interbank offered rate is incomplete, while that to the interbank offered rates of other maturities is complete. The short-term passthrough and adjustment speed of interest rates exhibit asymmetry. Therefore, before considering a full liberalization of interest rates, it is important to further enhance the competition of the financial system and the function of different interest rate systems, such as the interhank market and bond market.     

INTEREST RATE PASS-THROUGH IN THE COMMON MONETARY AREA OF THE SACU COUNTRIES

We investigate the interest rate pass‐through in the four Common Monetary Area (CMA) countries of the South African Customs Union (SACU). We employ an empirical pass‐through model that allows for thresholds, asymmetric adjustment, and structural changes. We show that CMA bank lending markets exhibit quite some degree of homogenization as the pass‐through is often fast and complete. Deposit markets are somewhat more heterogeneous by showing differing degrees of interest rate stickiness and asymmetric adjustment. Policy makers should therefore be concerned about imperfect competition which may be at the heart of the remaining cross‐country differences in monetary transmission in the CMA.     

RISK–RETURN TRADE‐OFF AND BEHAVIOUR OF VOLATILITY ON THE SOUTH AFRICAN STOCK MARKET: EVIDENCE FROM BOTH AGGREGATE AND DISAGGREGATE DATA

The study analyses the nature and behaviour of volatility, the risk–return relationship and the long‐term trend of volatility on the South African equity markets using aggregate level, industrial level and sectoral level daily data for the period 1995‐2009. By employing dummy variables for the Asian and the sub‐prime financial crises and the 11 September political shock, the study further examines whether the long‐term trend of volatility structurally breaks during financial crises and major political shocks. Three time‐varying generalised autoregressive conditional heteroskedasticity models were employed: one of them symmetric, and the other two asymmetric. Each of these models was estimated based on three error distributional assumptions. The findings of the study are as follows: First, volatility is largely persistent and asymmetric. Second, risk at both aggregate and disaggregate level is generally not a priced factor on the South Africa (SA) stock market. Third, the threshold autoregressive conditional heteroscedasticity (TARCH) model under the generalised error distribution is the most appropriate model for conditional volatility of the SA stock market. Fourth, volatility generally increases over time, and its trend structurally breaks during financial crises and major global shocks. The policy and investment implications of the findings are outlined.     

THE TRANSMISSION OF MONETARY POLICY UNDER THE REPO SYSTEM IN SOUTH AFRICA: AN EMPIRICAL ANALYSIS♣

The study examines the influence of the repo rate on the interbank rate and analyses whether the transmission channels of interest rates have changed since the adjustment to the repo system in September 2001. The paper employs the Granger causality test using the ECM framework. The results suggest that the influence of the repo rate on the interbank rate was stronger before the adjustments to the system were made. The interbank rate and the repo rate were found to “reverse” roles in the period after the adjustments to the system. Our results show that the changes to the repo system in 2001 did not lead to the achievement of the intended transmission channel; instead it was found that the system in place before the changes were made was in fact already achieving the transmission path that the authorities hoped to accomplish by changing the system.     

Monetary Policy Impulses and Retail Interest Rate Pass‐Through in Asian Banking Markets

This paper considers the integration of financial markets and mutual influences of monetary policies in the USA and Asia based on monthly data from 1994 to 2007. We used panel‐type and time‐series and quantile panel‐type error correction models to test the influences of expected and unexpected monetary policy impulses on the interest rate pass‐through mechanism in the financial markets of 9 Asian countries and the USA. The empirics show that if interest rate integration exists in the financial markets, the following effects are observed: (i) positive impulses of unexpected monetary policy will lead to an increase in the long‐run multiplier of the retail interest rate; (ii) the adjustment of retail interest rates with short‐run disequilibrium will lead to an increase in the long‐run markup; and (iii) the empirical results of quantile regression prove that when the interest variation is greater than the 0.5th quantile and unexpected monetary policy impulses are greater than the expected monetary policy impulses, the short‐run interest rate pass‐through mechanism becomes more unstable.     

INFLATION TARGETING AND THE FISHER EFFECT IN SOUTH AFRICA: AN EMPIRICAL INVESTIGATION

The paper analyses the relationship between expected inflation and nominal interest rates during a period of inflation targeting in South Africa, i.e. from 2000 to 2005. Specifically, it investigates the Fisher hypothesis that nominal interest rates move one‐to‐one with expected inflation, leaving the real interest rate unaffected. The analysis distinguishes between a short‐run Fisher effect and a long‐run Fisher effect. Using cointegration and error correction models (for monthly data for the period April 2000 to July 2005), it was found that the short‐run Fisher hypothesis did not hold during the relevant period under the inflation targeting monetary policy framework in South Africa. This is attributed to a combination of the South African Reserve Bank's (SARB) control over short‐term interest rates and the effects of the monetary transmission mechanism. The long‐run Fisher hypothesis could not be confirmed in its strictest form: while changes in inflation expectations move in the same direction as the nominal long‐term interest rate. This suggests that monetary policy has an influence on the real long‐term interest rate, which has positive implications for general economic activity, thus confirming the credibility of the inflation targeting framework.     

MACROECONOMIC UNCERTAINTY AND AGGREGATE PRIVATE INVESTMENT IN SOUTH AFRICA

This paper investigates the effects of time varying uncertainty on aggregate private fixed investment in South Africa. The GARCH generated measures of volatility of selected macroeconomic variables indicating five measures of uncertainty are used in the analysis. These are output growth uncertainty, uncertainty about changes in the real effective exchange rate, uncertainty about changes in the real interest rate, producer inflation uncertainty, and terms of trade uncertainty. The results of the estimation by an empirical ECM model of conventional investment determinants controlling for the effects of uncertainty indicated that, over all, time varying macroeconomic uncertainty significantly reduces private fixed investment.     

Inflation Transmission in Greater China

This paper examines inflation dynamics in Greater China. Using an asymmetric error correction model, we investigate how inflation in Hong Kong and Macao are related to inflation in Chinese Mainland. Our results based on data from July 1997 to December 2012 reveal that a long‐term equilibrium relation exists between inflation in Chinese Mainland and inflation in both Hong Kong and Macao, the two Special Administrative Regions of China. The degree of inflation pass‐through is higher for Macao than for Hong Kong. Moreover, we find no evidence of asymmetries in either Hong Kong and Macao's adjustment speeds towards long‐run equilibrium or in the short‐run pass‐through of accelerating or decelerating inflation in the Mainland. Collectively, our results show a close relationship among price dynamics of the three economies and call for a reconsideration of the exchange rate anchor in the Greater China Region.     

DEMAND FOR MONEY AND EXPENDITURE COMPONENTS IN SOUTH AFRICA: ASSESSMENT FROM UNRESTRICTED ERROR-CORRECTION MODELS

The main aim of this study is to examine empirically the long‐run relationship of money demand and its determinants in South Africa. In contrast with existing studies on the subject, the present study considers various components of real income as determinants. The disaggregated components are final consumption expenditure, expenditure on investment goods and exports. The other determinants are domestic interest rate, yield on government bonds and the exchange rate. The results confirm that the different components of real income have different impacts on the demand for money in South Africa. The presence of long‐run equilibrium relationships between the demand for real M1, M2 and M3 and their determinants is confirmed based on the results of bounds testing.     

Public Revenue‐Expenditure Nexus in South Africa: Are there Asymmetries?

This paper re‐examines the government revenue and expenditure relationship in South Africa using Enders and Siklos' Threshold adjustment and Granger causality tests. The paper allows for structural breaks in the unit root and cointegration tests. The results indicate the absence of any asymmetries in both the threshold autoregression and momentum threshold autoregression specifications of adjustments in the South African's budgeting process. The estimated symmetric error‐correction models provide support for the fiscal synchronization hypothesis of government revenues and expenditures for long‐run and short‐run dynamic equilibrium. These findings indicate that the South African fiscal authorities should try to maintain or even improve the control of their fiscal policy instruments to sustain the prudent budgetary process.     

Examining Volatility Persistence and News Asymmetry in Soybeans Futures Returns

Four alternative generalized autoregressive conditional heteroscedasticity (GARCH), and three asymmetric GARCH models (EGARCH, TGARCH and APARCH) are used to examine the presence of volatility persistence and news asymmetry in soybeans futures data. Presence of fat tails in the data series resulted in applying Student’s-t and generalized error distributions in addition to Gaussian normal distribution. The results reveal that soybean return series exhibit volatility characteristics typical of a financial time series. The findings of this study indicate that the leverage effect was absent for soybeans suggesting that positive news causes more volatility to the commodity than negative news. Results further suggest that the fit of the GARCH models is improved by applying t-distribution errors. The diagnostic tests reveal that GARCH models are correctly specified and among all the competing models, APARCH (1,3) model with t-distribution performed best in capturing the volatility.     

Monetary Policy Implementation and Volatility Transmission Along the Yield Curve: The Case of Kenya

This paper analyses the degree to which volatility in interbank interest rates leads to volatility in financial instruments with longer maturities (e.g. T‐bills) in Kenya since 2012, year in which the monetary policy framework switched to a forward‐looking approach, relative to seven other inflation targeting (IT) countries (Ghana, Hungary, Poland, South Africa, Sweden, Thailand and Uganda). Kenya shows strong volatility transmission and high persistence similar to other countries in transition to a more forwardlooking monetary policy framework. These results emphasize the importance of a strong commitment to an interbank rate as an operational target and suggest that the central bank could reduce uncertainty in short‐term yields significantly by smoothing out the overnight interest rates around the policy rate.     

New Evidence of Interest Rate Pass-through in Taiwan: A Nonlinear Autoregressive Distributed Lag Model

We adopt the newly developed nonlinear autoregressive distributed lag model, advanced by Shin, Yu and Greenwood-Nimmo [(2014) Modelling asymmetric cointegration and dynamic multipliers in a nonlinear ARDL framework, in: Festschrift in Honor of Peter Schmidt, pp. 281–314 (New York: Springer)], to investigate the interest rate(IR) pass-through (IRPT) mechanism in Taiwan from 1971 M07 to 2014 M11. We find that the incomplete IRPT mechanism of deposit markets shows an asymmetric adjustment in the short run and symmetric adjustments in the long run. The deposit rate is rigid downward, which supports the customer reaction hypothesis. Moreover, we find that both the short-run and the long-run IRPT channels from the policy rate to the lending rate are also incomplete in the short run but not in the long run. The purpose of this paper is to provide accurate assessment criteria for the central bank to understand the nonlinear dynamics among the policy IR and the retail IR, thus leading to more efficient policy-making and forecasting for the Taiwanese government.     

Revisiting the Exchange Rate Pass‐Through to Inflation in Africa’s Two Largest Economies: Nigeria and South Africa

This paper revisits the exchange rate pass‐through (ERPT) to inflation in Nigeria and South Africa by incorporating structural breaks and using time series variables, namely the consumer price index, nominal effective exchange rate, gross domestic product, and crude oil price. Based on the Maki cointegration test and a flexible estimation approach of the Autoregressive Distributed Lag (ARDL) model, our empirical evidence suggests that the long‐ and short‐run ERPT to inflation is complete for Nigeria, while for South Africa it is incomplete both in the long run and short run. This result indicates that prices are stickier in South Africa compared to Nigeria. The comparison between Nigeria and South Africa confirms the role of inflation targeting and central bank credibility on the ERPT. The results divulge further that output growth in Nigeria increases inflation in the long run while it is anti‐inflationary in the short run. For South Africa, the effect of output growth is negatively insignificant. In addition, the long‐run effect of oil price is negative and significant for Nigeria, while for South Africa the short‐run effect of oil price is positive and significant. Therefore, the findings of this paper will assist the monetary authorities to achieve monetary policy objectives.     

Exchange Rate Volatility and Trade: An Empirical Investigation from Cross‐country Comparison

Abstract: This paper investigates empirically the impact of exchange rate volatility on the trade flows of six countries over the quarterly period of 1980–2005. The impact of a volatility term on trade is examined by using an Engle‐Granger residual‐based cointegrating technique. The major results show that increases in the volatility of the real exchange rate, approximating exchange‐rate uncertainty, exert a significant negative effect on trade for South Korea, Pakistan, Poland and South Africa and a positive effect for Turkey and Hungary in the long run.     

Has the Exchange Rate Pass‐Through changed in South Africa?

This paper uses the two‐stage exchange rate pass‐through (ERPT) framework instead of the direct pass‐through (PT) from the exchange rate to consumer inflation to assess the variation in the ERPT for South Africa from 1994 to 2014. The paper uses rolling‐window estimation to examine the possibility of change in the ERPT over time. In addition, it investigates the asymmetric behaviour of the ERPT over the business cycle. The results indicate that the ERPT for South Africa is complete in the first stage but incomplete in the second stage. It implies that retailers do not pass all the cost to consumers. The first‐stage ERPT has declined slightly since the Global Financial Crisis. Weak domestic demand and possibly the concentration of firms in the manufacturing sector are the main forces behind this low PT. Moreover, there is evidence of asymmetry in the first‐stage ERPT in that it tends to rise in the upturn phase of the economy compared to the downturn. The second‐stage ERPT shows a considerable decline since the adoption of the inflation‐targeting regime. Similar to the first‐stage case, the PT is muted in the downturn but rises in the expansionary phase by about 10%.