Testing for efficiency and rationality in foreign exchange markets—a review of the literature and research on foreign exchange market efficiency and rationality with comments

2002 ◽  
Vol 21 (2) ◽  
pp. 223-239 ◽  
Author(s):  
Peijie Wang ◽  
Trefor Jones
2021 ◽  
pp. 097215092110205
Author(s):  
Dharmendra Singh ◽  
M. Theivanayaki ◽  
M. Ganeshwari

The objective of this article is to examine the volatility spillover effect between the foreign exchange market and the stock market of Brazil, Russia, India, China and South Africa (BRICS) countries along with Japan as the developed country in the region, affecting the BRICS countries. Generalized Autoregressive Conditionally Heteroscedastic (GARCH) (1,1) method is used to study the volatility between the stock market and the foreign exchange market in selected countries, and asymmetric model, that is, Exponential Generalized Autoregressive Conditional Heteroscedasticity—EGARCH (1,1) is also used to investigate the presence of leverage effects in both stock market and foreign exchange market in selected countries. GARCH findings suggest a two-way volatility spillover between the stock market and foreign exchange markets for India, China and South Africa. In BRICS countries, volatility spillover from the currency market to the stock market is seen as more evident and robust as compared to spillover from the stock market to the currency market. A positive asymmetry in spillover is also observed from the foreign exchange market to the stock market. The findings of the study may provide valuable information to investors for decision-making in international portfolio investment and also for economic policymakers for their financial stability perspective.


2012 ◽  
Vol 11 (3) ◽  
pp. 299 ◽  
Author(s):  
John F. Boschen ◽  
Kimberly J. Smith

The uncovered interest rate parity (UIP) anomaly is that high interest rate currencies appreciate, rather than depreciate, against low interest rate currencies. We show that the UIP anomalies apparent in six major currency pairs have diminished over our 1995-2010 sample period. We further show that the observed decline in deviations from UIP is associated with the substantially higher transaction volume now present in the foreign exchange markets. We interpret our findings as consistent with the proposition that the UIP anomaly dissipates as the foreign exchange markets become more efficient.


2018 ◽  
Vol 13 (4) ◽  
pp. 676-688 ◽  
Author(s):  
Radhika Prosad Datta ◽  
Ranajoy Bhattacharyya

Purpose The purpose of this paper is to determine whether foreign exchange markets in India have become more efficient over time. There were two major developments in India’s foreign exchange market since the 1980s: first, a shift in foreign exchange management regime from a basket peg to a free float; and second, a rapid phase of economic liberalization since the mid-1990s. The paper attempts to find out whether the market efficiency of foreign exchange markets is affected by these developments. The paper mainly uses the well-known Hurst exponent calculated through corrected empirical R over S analysis to determine whether the exchange rates possess long memory. The robustness of the method is tested by calculating the Hurst exponent through two other prevalent methods in the literature. Design/methodology/approach The authors apply the corrected empirical Hurst exponent which employs the Anis Lloyd correction with the modification suggested by Weron. The sensitivity of the results is then tested by replicating the calculations using the detrended fluctuation analysis and Robinson’s method. Findings All the methods show that: first, there is no significant change in the overall efficiency of the foreign exchange market vis a vis the US$ for the time period from 1980 to 2017. Second, neither regime shifts nor calculations over sub-time periods is able to identify significant change in the efficiency level of the market for the US$ exchange rate. Third, efficiency of different exchange rate markets are different over the time period 1999–2017. The US$ market has unequivocally more long run memory compared to the GBP, Yen and EURO markets. Fourth, the results are robust to the method used for calculations. Originality/value Does the efficiency of asset markets evolve over time? This paper attempts to answer this question. In the process, the paper studies the effect of regime shifts and progressive globalization on the ability of the market to internalize information.


2013 ◽  
Vol 29 (5) ◽  
pp. 1529 ◽  
Author(s):  
Lumengo Bonga-Bonga

<p>The paper assesses the dynamic interaction between exchange rates and stock market volatility in South Africa by making use of the generalised impulse response function obtained from a bivariate VAR model. Volatility variables in the VAR system are obtained from a family of GARCH models based on criteria such as covariance stationarity and leverage effects. The findings of the paper show that foreign exchange conditional volatility responds positively to volatility shocks to the equity market. Nonetheless, the response of the equity market conditional volatility to volatility shocks to the foreign exchange market is short-lived and neutral for most of the time horizon periods. The paper attributes this finding mainly to the extent of foreign participation in emerging equity market in general and the South African equity market in particular.</p>


1989 ◽  
Vol 29 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Ronald MacDonald ◽  
Mark P. Taylor

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