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1 – 10 of over 4000Sei Jeong and Munisamy Gopinath
This study aims to investigate the role of international price volatility and inventories on domestic market price dynamics in the case of agricultural commodities.
Abstract
Purpose
This study aims to investigate the role of international price volatility and inventories on domestic market price dynamics in the case of agricultural commodities.
Design/methodology/approach
A structural model is employed to uncover relationships among commodity price, price volatility, inventories and convenience yield. Monthly producer price data along with annual data on trade, consumption, inventories and tariffs for 71 countries and 13 commodities covering 2010–2019 are assembled to estimate the model. With a first-stage Least Absolute Shrinkage and Selection Operator (LASSO) estimator to identify the best instrument set, a nonlinear approach is used to estimate the model.
Findings
Results show that international market information plays a critical role in domestic market price dynamics. International price volatility has a stronger effect on domestic prices than that of international inventories.
Research limitations/implications
Current upheaval in commodity markets requires an understanding of how prices move together and inventories affect that movement. A country's internal price is not independent of the effects of global market events.
Originality/value
Although hypotheses exist that global market information (volatility and inventories) helps countries manage domestic commodity prices, there have been limited studies on this relationship, especially with a structured model and cross-country data.
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This paper aims to investigate price responses and volatility spillovers between commodity spot and futures markets. The study ultimately seeks the evidence-based claims on the…
Abstract
Purpose
This paper aims to investigate price responses and volatility spillovers between commodity spot and futures markets. The study ultimately seeks the evidence-based claims on the efficiency of the long run and short run horizontal price transmissions from futures markets to spot markets.
Design/methodology/approach
This study used the most recent daily price series of pepper, cardamom and rubber, during the period 2004–2019, use “cointegration-ECM-GARCH framework” and verify the persisting validity of the “expectancy theory” of commodity futures pricing.
Findings
The results offer overwhelming evidence of futures market dominance in the price discoveries and volatility spillovers in spot markets. However, this paper finds asymmetric responses between cash and futures prices across markets. The hedging efficiency of futures contracts is commodities specific’ where spices futures are more efficient than the rubber futures.
Practical implications
The study passes on vital information to the producers and traders of spices and rubber who have a potential interest in the use of futures contracts to make profits from arbitrage between futures and cash markets.
Originality/value
The paper is unique in terms of understanding asymmetric price linkages in markets for plantation crops.
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The purpose of this paper is to understand the volatility in commodity futures and spot markets. The study starts with a few questions: first, the effect of seasonality on the…
Abstract
Purpose
The purpose of this paper is to understand the volatility in commodity futures and spot markets. The study starts with a few questions: first, the effect of seasonality on the volatility is studied. Thereafter, the presence of structural breaks in the variance is identified. At last the seasonality, structural shifts and spillover effects are examined together to find out their effects on volatility.
Design/methodology/approach
The methodology heavily employs econometric tools and techniques. The monthly seasonal dummies are incorporated to identify the effects of seasonality on volatility. Then, the presence of break in volatility is tested by cumulative sum of squares (CUSUM test), followed by generalized autoregressive conditional heteroscedastictity and EGARCH models are measured by including seasonal dummies, break dummies and the residuals of other market in the variance equation to determine spillover effects.
Findings
It is found that the effects of seasonality on volatility cannot be ignored as the effects are significant. The presence of asymmetry is detected in all the commodities. The presence of seasonality and structural breaks in the variance equation are statistically able to reduce the volatility but the magnitude is very negligible with an exception in cumin futures markets. Bi-directional volatility spillover between futures and spot markets is observed in all the commodities and the effect of spillover is more from spot markets to the futures markets.
Research limitations/implications
This study is limited to a few agro commodities which are well traded. This study could have been extended to the other thinly traded commodities. This study has also taken only near month futures contracts as it contains more information but the same could have been studied by taking far month contracts also.
Originality/value
The present study attempted to understand the conjugated effects of seasonality, structural breaks and spillover on volatility of commodity markets which is not apparent in the previous studies. This study has also employed methodological rigor to identify the breaks in the variance equation. In addition to this it has also investigated whether Indian commodity futures markets are informationally more efficient than the spot markets.
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Rexford Abaidoo, Elvis Kwame Agyapong and Kwame Fosu Boateng
This paper aims to examine the effect of volatility in prices of internationally traded commodities (the backbone of most economies) on the stability of the banking industry from…
Abstract
Purpose
This paper aims to examine the effect of volatility in prices of internationally traded commodities (the backbone of most economies) on the stability of the banking industry from three main perspectives; bank liquidity reserves, overall bank risk and bank capital adequacy.
Design/methodology/approach
Data were compiled from various sources for 30 emerging economies from 2002 to 2018 and were analyzed using the two-step system generalized method of moments estimation technique.
Findings
The study finds that all things being equal, the magnitude and direction of impact of commodity price volatility on bank stability among economies in Sub-Saharan African (SSA) depend on the type and nature of the commodity in question; and the bank stability proxy used. For instance, an increase in crude oil prices is found to foster stability in the banking industry (proxied by bank liquid reserves) but insignificant when stability in the banking industry is proxied using other banking sector parameters. Additionally, government effectiveness and corruption control have varying moderating influences on how volatility associated with prices of internationally traded commodities influence various proxies for banking industry stability.
Originality/value
This study highlights the effect of fluctuations in prices of key internationally traded commodities (adjusted for foreign exchange impact) that are important sources of revenue among economies in SSA on banking sector stability from liquidity, overall risk and capital adequacy perspectives. The influential role of governance in the relationship between volatility in the price of commodities and bank stability is also revealed by the study.
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Shailesh Rastogi and Jagjeevan Kanoujiya
The nexus of commodity prices with inflation is one of the main concerns for a nation's economy like India. The literature does not have enough volatility-based study, especially…
Abstract
Purpose
The nexus of commodity prices with inflation is one of the main concerns for a nation's economy like India. The literature does not have enough volatility-based study, especially using the multivariate GRACH family of models to find a link between these two. It is the main reason for the conduct of this study. This paper aims to estimate the volatility effects of commodity prices on inflation.
Design/methodology/approach
For ten years (2011–2022), future prices of selected seven agriculture commodities and inflation indices (wholesale price index [WPI] and consumer price index [CPI]) are gathered every month. BEKK GARCH model (BGM) and DCC GARCH model (DGM) are employed to determine the volatility effect of commodity prices (CPs) on inflation.
Findings
The authors find that volatility's short-term (shock) impact on agricultural CPs to inflation does not exist. However, the long-term volatility spillover effect (VSE) is significant from commodities to inflation.
Practical implications
The study's findings have a significant implication for the policymakers to take a long-term view on inflation management regarding commodity prices. The findings can facilitate policy on the choice of commodities and the flexibility of their trading on the commodities derivatives market.
Originality/value
The findings of the study are unique. The authors do not observe any study on the volatility effect of agri-commodities (agricultural commodities) prices on inflation in India. This paper applies advanced techniques to provide novel and reliable evidence. Hence, this research is believed to contribute significantly to the knowledge body through its novel evidence and advanced approach.
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The purpose of this paper is to ascertain the possible consequences of ban on futures trading of agriculture commodities in India by examining three critical issues: first, the…
Abstract
Purpose
The purpose of this paper is to ascertain the possible consequences of ban on futures trading of agriculture commodities in India by examining three critical issues: first, the author explores whether price discovery dominance changes between futures and spot in the pre-ban and post-relaunch phase both in the long run and short run. Second, the author examines the impact of ban and relaunch of futures trading on its underlying spot volatility for five sample cases of agriculture commodities (Wheat, Sugar, Soya Refined Oil, Rubber and Chana) using both parametric and non-parametric tests. Third, the author revisits the destabilization hypothesis in the light of ban on futures trading by examining the impact of unexpected component of liquidity of futures on spot volatility.
Design/methodology/approach
The author uses widely adopted methodology of co-integration to examine long-run relationship between spot and futures, while the short-run relationship is investigated using vector error correction model (VECM) and Granger causality to test price discovery in the pre-ban and post-relaunch phases. The second objective is explored using a combination of parametric and non-parametric tests such as Welch one-way ANOVA and Kruskal–Wallis test, respectively, to gauge the impact of ban on futures trading on spot volatility along with post hoc tests to investigate pairwise comparison of spot volatility among three phases (pre-ban, ban and post-relaunch) using Dunn Test. In addition, extensive robustness test is undertaken by adopting augmented E-GARCH model to ascertain the impact of ban and relaunch of futures trading on spot volatility. The third objective is investigated using Granger causality test between spot volatility and unexpected component of liquidity of futures estimated using Hodrick and Prescott (HP) filter to re-visit the destabilization hypothesis.
Findings
The author found extensive evidence for the dominance of futures market in the price discovery of agriculture commodities both in the pre-ban and post-relaunch phases in India. The ban on futures trading is found to have a destabilizing impact on spot volatility as evident from the findings of Wheat, Sugar and Rubber. In addition, it is observed that spot volatility was highest during the ban phase as compared to the pre-ban and post-relaunch phases for all four commodities barring Chana. The author found that destabilisation hypothesis holds true during the pre ban phase, while weakening of destabilization hypothesis is observed in the post-relaunch phase as unexpected futures liquidity has no role in driving the spot volatility.
Originality/value
This study is a novel attempt to empirically examine the potential impact of ban and relaunch of futures trading of agriculture commodities on two key market quality dimensions – price discovery and spot volatility. In addition, destabilization hypothesis is revisited to investigate the impact of futures trading on spot volatility during the pre-ban and post-relaunch period.
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Rabah Arezki and Thorvaldur Gylfason
We use a new dataset on nonresource GDP to examine the impact of commodity price volatility on economic growth in a panel of up to 158 countries during the period 1970–2007. Our…
Abstract
We use a new dataset on nonresource GDP to examine the impact of commodity price volatility on economic growth in a panel of up to 158 countries during the period 1970–2007. Our main finding is that commodity price volatility leads to a significant increase in nonresource GDP growth in democracies, but to no significant increase in autocracies. To explain this result, we show that increased commodity price volatility leads to a statistically significant and quantitatively large increase in net national saving in democracies. In autocracies, on the contrary, net national saving decreased significantly. Our results hold true when using indicators capturing the quality of economic institutions in lieu of indicators of political institutions.
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This paper aims to propose an alternative method to measure idiosyncratic volatility and test whether the idiosyncratic volatility puzzle holds in commodity futures markets.
Abstract
Purpose
This paper aims to propose an alternative method to measure idiosyncratic volatility and test whether the idiosyncratic volatility puzzle holds in commodity futures markets.
Design/methodology/approach
This paper proposes a partially new measure of idiosyncratic volatility in commodity futures markets based on the Schwartz and Smith (2000) short-term/long-term model. This model enables us to capture systematic risks of commodity futures markets in a parsimonious way.
Findings
Using a sample of futures contracts for 20 commodities from 1973 to 2022, this paper demonstrates that idiosyncratic volatility is more significant than systematic volatility in commodity futures markets, and that the idiosyncratic volatility puzzle does not hold in these markets. This paper also performs robustness tests to investigate whether the puzzle holds during subsample periods when commodity markets are more volatile and find consistent results. This study highlights the differences between commodity futures markets and equity markets and emphasizes the importance of investigating idiosyncratic volatility in commodity futures markets.
Originality/value
The contributions of this paper are threefold. First, this paper contributes to the literature by focusing on the idiosyncratic volatility of commodity futures returns. Second, this paper constructs a partially new measure of idiosyncratic volatility in commodity futures markets. Finally, this paper also contributes to the literature on the idiosyncratic volatility puzzle and demonstrates that the puzzle may not exist in commodity futures markets.
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Rexford Abaidoo and Elvis Kwame Agyapong
This study examines the dynamics of financial institution development among economies in sub-Saharan Africa (SSA) and how volatility in forex-adjusted price of key globally…
Abstract
Purpose
This study examines the dynamics of financial institution development among economies in sub-Saharan Africa (SSA) and how volatility in forex-adjusted price of key globally traded, commodities and macroeconomic risk influence such development.
Design/methodology/approach
The study is based on data collected from the period starting 2001 to 2019 for relevant variables; and the empirical test was performed using the two-step system generalized method of moments (TSS-GMM) estimation method.
Findings
Empirical estimates suggest that volatility in forex-adjusted prices of crude oil and cocoa are inimical to development of financial institutions among economies in the sub-region. On the other hand, volatility in the price of gold is found to have a significant positive effect on development of financial institutions. Additionally, political instability is found to exacerbate the adverse effect of volatility in the price of globally traded commodities on the development of financial institutions in the sub-region.
Originality/value
The study verifies how volatility in forex-adjusted prices of key traded commodities on the global market influence development of financial institutions in the sub-region. Additionally, the study examines the impact of macroeconomic risk, a principal component analysis (PCA) constructed index on the development trajectory of financial institutions. Finally, the authors examine the moderating role of institutional quality and political instability in the relationship in question.
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The purpose of this paper is twofold. First, the author proposes a financial engineering framework to model commodity prices based on market demand processes and demand functions…
Abstract
Purpose
The purpose of this paper is twofold. First, the author proposes a financial engineering framework to model commodity prices based on market demand processes and demand functions. This framework explains the relation between demand, volatility and the leverage effect of commodities. It is also shown how the proposed framework can be used to price derivatives on commodity prices. Second, the author estimates the model parameters for agricultural commodities and discuss the implications of the results on derivative prices. In particular, the author see how leverage effect (or inverse leverage effect) is related to market demand.
Design/methodology/approach
This paper uses a power demand function along with the Cox, Ingersoll and Ross mean-reverting process to find the price process of commodities. Then by using the Ito theorem the constant elastic volatility (CEV) model is derived for the market prices. The partial differential equation that the dynamics of derivative prices satisfy is found and, by the Feynman-Kac theorem, the market derivative prices are provided within a Monte-Carlo simulation framework. Finally, by using a maximum likelihood estimator, the parameters of the CEV model for the agricultural commodity prices are found.
Findings
The results of this paper show that derivative prices on commodities are heavily affected by the elasticity of volatility and, consequently, by market demand elasticity. The empirical results show that different groups of agricultural commodities have different values of demand and volatility elasticity.
Practical implications
The results of this paper can be used by practitioners to price derivatives on commodity prices and by insurance companies to better price insurance contracts. As in many countries agricultural insurances are subsidised by the government, the results of this paper are useful for setting more efficient policies.
Originality/value
Approaches that use the methodology of financial engineering to model agricultural prices and compute the derivative prices are rather new within the literature and still need to be developed for further applications.
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