risk sharing and contagion in networks we investigate the socially optimal design of financial networks that allows to tackle the trade off between risk sharing and contagion we identify conditions on the shock distribution under which full integration or maximal segmentation is optimal we also show that under different conditions the optimal network displays different levels of strength of linkages to other firms or intermediate degrees of segmentation in the latter case the individual and social incentives to establish linkages are not necessarily aligned when firms face heterogeneous distributions of risks they should optimally form linkages only with firms facing risks of the same kind

price and volatility spillovers across the international steam coal market we examine the degree of integration of the global steam coal market using a variety of measures we show that the australian market remains the dominant force in setting world coal prices followed by mozambique and south africa we find little evidence of asymmetric price and volatility transmission in fact most markets react to both positive and negative shocks in a symmetric manner the coal market displays a significant degree of integration although this effect varies over time while china provides a major source of volatility to the global coal market it is relatively insignificant in terms of price transmission

liquidity in asian markets intensity of regional and global linkages this study investigates cross market linkages and the intensity of liquidity spillovers across nine asian markets and five developed markets during 2006 to 2016 further the study examines the con

real sectoral spillovers a dynamic factor analysis of the great recession abstract dynamic factor methods are used to identify the impact of common and idiosyncratic shocks on sixteen u s nonfarm business sectors this paper then studies changes in the transmission of these shocks across sectors during the great recession and evaluates the cross sectoral spillovers the great recession is found to be largely a time of heightened impact of common shocks which accounts for 3 4 of aggregate volatility and large spillovers of negative finance related shocks in addition prior to the recession aggregate fluctuations are mainly driven by sector specific shocks in contrast with findings from previous studies

oil and foreign exchange market tail dependence and risk spillovers for mena emerging and developed countries vmd decomposition based copulas abstract this paper examines the short and medium run dependence structures between oil and currency markets for mena other developing and developed countries using a novel multiresolution decomposition method namely the variational mode decomposition vmd along with a battery of time invariant and time varying symmetric and asymmetric copula functions further we assess the downside and upside short and medium run risk spillovers from oil to u s exchange rate returns and vice versa by computing the conditional value at risk covar risk measures before the copula estimations we apply the spillover index of diebold and yilmaz 2012 and network diagrams to identify and select the currencies that are the most significant net contributors or net receivers of returns from to the oil currency markets the copula results show strong evidence of time varying and high average tail dependence between oil returns and the fx markets which are net transmitters to oil for the short and medium time horizons on the other hand we find average and relatively low dynamic dependence between oil and the net receiver currencies regardless of the time horizons moreover there is evidence of up and down risk asymmetric systemic risks from oil to currencies and vice versa for some countries in the short and medium run horizons finally the risk spillovers are asymmetric over time and investment horizons these results have several important implications for hedging strategies and diversification benefits for oil and fx traders and institutional investors

period specific volatility spillover based connectedness between oil and other commodity prices and their portfolio implications abstract this paper analyses the changing impact of oil price shocks on a bouquet of metal and agro prices and their implications for investment decisions during different oil price regimes separated by structural breaks endogenously identifying the structural breaks we use network analysis to decipher the nature and extent of such shock transfer across different sub periods we suggest optimal portfolios based on conditional variance estimates to hedge oil shocks during each period this is the first study to analyse the portfolio decisions during specific oil price regimes the results are of significant interest to investors and policy makers

dynamic connectedness of oil price shocks and exchange rates abstract using a novel method of isolating the oil price shocks we study how different sources of oil price shocks are connected to exchange rates of major oil dependent countries using daily data from march 1996 to february 2019 we find that oil price shocks resulting from changes in demand and risk significantly contribute to variation in exchange rates while supply shocks have virtually no impact the connectedness of this relationship between oil price shocks and exchange rates has significantly increased after the global financial crisis we also find that oil price shocks do not explain the variation in exchange rate volatility but we document significant volatility connectedness among exchange rates our findings have important implications for policy makers and financial market participants

on the economics of private money abstract the application of laissez faire to the monetary system is a key ingredient of important proposals for monetary reform both new and old that seek to discipline government creation of money through competition this paper provides an overview of issues to be encountered in the construction of theoretical models of private monetary economies including consideration of market imperfections that have been hypothesized to arise in these systems further some descriptive history of the less regulated monetary systems of 19th century new york is undertaken with an emphasis on discussing the nature of market generated banking and monetary institutions in light of these critiques

connectedness of economic policy uncertainty and oil price shocks in a time domain perspective abstract in this paper we investigate causality and connectedness between economic policy uncertainty and oil price shocks across time scales by incorporating the wavelet approach into the structural vector autoregression var framework proposed by diebold and yilmaz 2009 2012 2014 we find that crude oil prices behave like receivers of information from economic policy uncertainty regardless of time scale however the causality relationship between economic policy uncertainty and oil price shocks intensifies as time scales increase in addition the connectedness relationship is robust to time scale changes whereas the causal relationship intensifies as time scales increase notably the weight of us economic policy uncertainty increases in the var system as time scales increase in particular we employ the west texas intermediate wti crude oil price as an alternative measure to increase the robustness of our results and identify differences in the var system overall the total connectedness of the wti crude oil price is lower than that of the brent crude oil price regardless of time scale our results provide meaningful information for both investors and policymakers

contagion and banking crisis international evidence for 2007 2009 abstract policy makers aim to avoid banking crises and although they can to some extent control domestic conditions internationally transmitted crises are difficult to tackle this paper identifies international contagion in banking during the 2007 2009 crisis for 54 economies we identify three channels of contagion systematic idiosyncratic and volatility and find evidence for these in 45 countries banking crises are overwhelmingly associated with the presence of both systematic and idiosyncratic contagion the results reveal that crisis shocks transmitted from a foreign jurisdiction via idiosyncratic contagion increase the likelihood of a systemic crisis in the domestic banking system by almost 37 percent whereas increased exposure via systematic contagion does not necessarily destabilize the domestic banking system thus while policy makers and regulatory authorities are rightly concerned with the systematic transmission of banking crises reducing the potential for idiosyncratic contagion can importantly reduce the consequences for the domestic economy

a broadened causality in variance approach to assess the risk dynamics between crude oil prices and the jordanian stock market within the new developed causality in variance approach this paper builds up a broad methodological framework to more accurately capture the risk spillover effects between global oil prices and jordanian stock market returns during the period 1 march 2003 31 january 2014 the sample period is divided on the basis of the 2008 financial crisis into pre crisis and post crisis periods results for the pre crisis period show a lack of risk spillovers between global oil and the jordanian stock market after the crisis however we find evidence for one way risk spillover running from the oil market these findings have implications for the design of appropriate asset allocation and regulatory policies to manage risk spillover effects

oil shocks and financial systemic stress international evidence abstract by conducting a structural var analysis on the financial systemic stress in 20 countries this paper provides international evidence that oil structural shocks impact not only stress in individual financial markets but also their connectedness the oil structural shocks explain a large fraction of the variation in the connectedness among various financial markets the effect of oil structural shocks on financial systemic stress is largely dependent on the origins of oil price changes and a country s net oil export position in most oil importing economies financial systemic stress is negatively impacted by supply and aggregate demand shocks and positively impacted by oil market specific demand shocks opposite patterns are detected in oil exporting economies the effects of the spillovers are asymmetrically related with market conditions during normal periods more risks are spilled over from the oil market to financial systems but during financial crises the opposite occurs in periods of financial crises and oil price collapses there is noticeable contagion between the oil market and financial systems

food oil volatility spillovers and the impact of distinct biofuel policies on price uncertainties on feedstock markets over recent decades the link between crude oil and agricultural markets has been reinforced following the introduction of biofuels we use timely measures of co variation spillovers to analyze the role of crude oil in shaping price uncertainties of agricultural commodities which are largely used as biofuel feedstocks our sectoral and market specific measures distinguish tranquil 1995 2005 and crisis episodes 2006 2015 as well as periods during which either consumption mandates or tax credits were enacted to spur biofuels during the crisis period crude oil volatility transmissions account for 16 20 of price uncertainties in ethanol biodiesel feedstock markets on average moreover we find evidence of enhanced volatility transmissions under tax credit regimes compared with consumption mandates the results from pooled regressions confirm stronger volatility transmissions by about 12 under the enactment of tax credits

euro area government bonds fragmentation and contagion during the sovereign debt crisis abstract the paper analyzes the integration of euro area sovereign bond markets during the european sovereign debt crisis it tests for contagion i e an intensification in the transmission of shocks across countries fragmentation a reduction in spillovers and flight to quality patterns exploiting the heteroskedasticity of intraday changes in bond yields for identification the paper finds that euro area government bond markets were well integrated prior to the crisis but saw a substantial fragmentation from 2010 onward flight to quality was present at the height of the crisis but has largely dissipated after the european central bank s ecb s announcement of its outright monetary transactions omt program in 2012 at the same time italy and spain became more interdependent after the omt announcement providing our only evidence of contagion this suggests that countries have been effectively ring fenced and italy and spain benefited from the joint reduction in yields following the omt announcement

price dispersion in bitcoin exchanges abstract bitcoin is traded in a number of exchanges and there is a large and time varying price dispersion among them we identify the sources of price dispersion using a standard time varying vector autoregression model with stochastic volatility and we find that shocks to transaction fees and bitcoin price growth explain on average 20 and sometimes more than 60 of the variation of price dispersion

a variance spillover analysis without covariances what do we miss we evaluate the relevance of covariances in the transmission mechanism of variance spillovers across the us stock us bond and gold markets from july 2003 to december 2012 for that purpose we perform a comparative spillover analysis between a model that considers covariances and a model that considers only variances our results emphasise the importance of covariances including covariances leads to an overall increase of the spillover level and detects the beginnings of the financial crisis and of the us debt ceiling crisis earlier than the spillover measure that considers only variances even for the low dimensional system that we consider one misses important variance spillover channels when covariances are excluded

currency downside risk liquidity and financial stability abstract we estimate volatility and quantile depreciation based spillovers across 20 global currencies against the us dollar in so doing we reveal significant asymmetries in the propagation of risk across global currency markets the quantile based statistic reacts more significantly to events that have a sizable impact on fx markets e g brexit vote and the fx crash following the subprime crisis which are missed by the volatility based statistic as such our tail spillover estimates constitute a new financial stability index for the fx market this index has the advantages of being easy to build of not requiring intraday data and of being more informative about currency crises and pressures than traditional spillover statistics based on volatilities finally we also document differences in the relation between liquidity and volatility quantile spillovers

covariance breakdowns and connectedness of crude oil futures markets with non synchronous data this article identifies the breakdowns in the covariance of three benchmark crude oil futures markets wti brent and dubai and investigates the changes of market connectedness across the breakdow

the directional volatility connectedness between crude oil and equity markets new evidence from implied volatility indexes in this paper we use a set of newly introduced implied volatility indexes to investigate the directional connectedness between oil and equities in eleven major stock exchanges around the globe from 2008 to 2015 the inference on the oil equity implied volatility relationships depends on diebold and yilmaz 2012 2014 2015 who proposed a set of directional measures that enable the dynamic and directional characterization of the relationships among financial variables we find uniform results across the sample countries indicating that the connectedness between oil and equity is established by the bi directional information spillovers between the two markets however we find that the bulk of association is largely dominated by the transmissions from the oil market to equity markets and not the other way around the pattern of transmissions is varying over the sample period however most of the linkages between oil and equities are established from the mid of 2009 to the mid of 2012 which is a period that witnessed the start of global recovery

learning and complementarities in speculative attacks we study a model where the aggregate trading of currency speculators reveals new information to the central bank and affects its policy decision we show that the learning process gives rise to coordination motives among speculators leading to large currency attacks and introducing non fundamental volatility into exchange rates and policy decisions we show that the central bank can improve the ex ante effectiveness of its policy by committing to put a lower weight ex post on the information from the market and that transparency may either increase or decrease the effectiveness of learning from the market depending on how it is implemented

competitive banking bankers clubs and bank regulation this paper reexamines the view that banking regulation and central banking arose to counter market failures it investigates the factors that led bankers to form clubs and examines the regulations imposed by clubs on their members it suggests that such regulation is different from real world regulation and central banking and would be unlikely to arise spontaneously from free banking anyway it also suggests that this view is consistent with available evidence and compares it with the alternative views of gary gorton and donald j mullineaux 1987 and of charles a e goodhart copyright 1994 by ohio state university press

spillover effect between the regional and the national housing markets in the uk tsai i c spillover effect between the regional and the national housing markets in the uk regional studies this study uses regional and national data from the uk housing market to analyse the spillovers between these markets and to test whether a ripple effect exists in uk housing prices cross market return spillovers are determined by performing spillover indices an analysis of the direction and magnitude of return spillovers can be used to discriminate the transmission mechanism of information between the regional and the national housing markets over different areas and different time spans empirical findings indicate that the difference in housing prices between the northern and southern regions of the uk will increase each time a new financial crisis occurs

volatility transmission in emerging european foreign exchange markets abstract this paper studies the dynamics of volatility transmission between central european ce currencies and the eur usd foreign exchange using model free estimates of daily exchange rate volatility based on intraday data we formulate a flexible yet parsimonious parametric model in which the daily realized volatility of a given exchange rate depends both on its own lags as well as on the lagged realized volatilities of the other exchange rates we find evidence of statistically significant intra regional volatility spillovers among the ce foreign exchange markets with the exception of the czech and prior to the recent turbulent economic events polish currencies we find no significant spillovers running from the eur usd to the ce foreign exchange markets to measure the overall magnitude and evolution of volatility transmission over time we construct a dynamic version of the diebold yilmaz volatility spillover index and show that volatility spillovers tend to increase in periods characterized by market uncertainty

information linkage dynamic spillovers in prices and volatility between the carbon and energy markets abstract the european union emissions trading system eu ets has strengthened the information flow and connection between carbon market and energy markets which makes the carbon energy system more complicated this paper investigates information linkages and dynamic spillover effects between the carbon and energy markets we adopt a systemic time series approach to study connectedness in both returns and volatility in the carbon energy system moreover a rolling windows method is used to show the dynamic features empirical results show that brent oil prices play an important role in affecting carbon price changes and risks feedback exists from the carbon market to other energy markets and electricity prices are shown to be the biggest information receiver in the system it is also shown that the level of connectedness in the volatility system is substantially higher than that in the returns system our results can provide useful implications for policymakers to design market mechanisms and market investors to manage their portfolios

us presidential elections and implied volatility the role of political uncertainty abstract this paper focuses on the effects of political uncertainty and the political process on implied stock market volatility during us presidential election cycles using monthly iowa electronic markets data over five elections we document that stock market uncertainty as measured by the vix volatility index increases along with positive changes in the probability of success of the eventual winner the association between implied volatility and the election probability of the eventual winner is positive even after controlling for changes in overall election uncertainty these findings indicate that the presidential election process engenders market anxiety as investors form and revise their expectations regarding future macroeconomic policy

financial contagion and asset pricing abstract asset market interconnectedness can give rise to significant contagion risks during periods of financial crises that extend beyond the risks associated with changes in volatilities and correlations these channels include the transmission of shocks operating through changes in the higher order comoments of asset returns including changes in coskewness arising from changes in the interaction between volatility and average returns across asset markets these additional contagion channels have nontrivial implications for the pricing of options through changes in the payoff probability structure and more generally in the management of financial risks the effects of incorrectly pricing risk has proved to be significant during many financial crises including the subprime crisis from mid 2007 to mid 2008 the great recession beginning 2008 and the european debt crisis from 2010 using an exchange options model the effects of changes in the comoments of asset returns across asset markets are investigated with special emphasis given to understanding the effects on hedging risk during financial crises the results reveal that by not correctly pricing the risks arising from higher order moments during financial crises there is significant mispricing of options while hedged portfolios during noncrisis periods become exposed to price movements in times of crises

detecting contagion in a multivariate time series system an application to sovereign bond markets in europe this paper proposes an original three part sequential testing procedure stp with which to test for contagion using a multivariate model first conditional on breaks in the conditional mean the procedure identifies distinct structural breaks in the volatility of a given set of countries a further structural break test applied to the correlation matrix identifies and then dates the potential contagion mechanisms as a third element the stp tests for the distinctiveness of the break dates previously found as a result of using multi dimensional data the stp has high testing power and is able to locate the dates of contagion more precisely the application to european long term interest rates shows that immediate contagion from greece does not take place but the dynamic spillovers are shown to increase after controlling for breaks in the different model parameters for other countries we find evidence of both contagion and flight to quality mechanisms

volatility spillovers in commodity markets a large t vector autoregressive approach abstract prices of commodities have shown large fluctuations a high volatility of one commodity today may impact the volatility of another commodity tomorrow as such agricultural and energy commodities are closely dependent due to the expansion of the biofuel industry we study volatility spillovers among a large number of energy agriculture and biofuel commodities using the vector auto regressive var model to account for the possible fat tailed distribution of the model errors we propose the t lasso method for obtaining a large var the t lasso is shown to have excellent properties and a forecast analysis shows that the t lasso attains better forecast accuracy than standard estimators our empirical analysis shows the existence of volatility spillovers between energy and biofuel and between energy and agricultural commodities

the suppression of state banknotes a reconsideration george selgin it is generally believed that congress in imposing a prohibitive 10 tax on state banknotes in 1865 made the public better off by doing away with inferior brands of currency while simultaneously helping finance the civil war by stimulating bond sales to national banks in truth the tax served neither purpose the true purpose of the 10 tax was not to enhance bond sales or to improve the quality of the currency but to offset the inflationary effects of greenbacks and national banknotes in the long run the public might have been better off had state banks retained their right to issue currency jel g21 n21 let us have a bank currency that will be recognized in the next town a currency that will be recognized in new york philadelphia boston new orleans chicago or any other part of the united states representative john f farnsworth illinois april 28 1864 congressional globe 38th congress 1st session 1934 i f the national banks with the great advantages which they enjoy cannot compete successfully with the state banks it simply shows that the latter subserve better the interests of the business community and should not be destroyed representative francis kernan new york february 16 1865 congressional globe 38th congress 2d session 833 i introduction during the civil war a 10 tax was placed on any issuance of notes of state chartered or incorporated banks deliberately forcing state banks out of the paper currency business and making the regulation and issuance of currency a prerogative of the federal government and of federally chartered national banks this paper reexamines the congressional decision to suppress state banknotes american monetary historians have conventionally viewed the decision as reflecting 1 the public s intolerable disgust with an unregulated currency hammond 1957 11 compare dunbar 1922 220 and 2 the government s desire to boost the demand for national bank charters so as to expand the market for its debt e g hughes and cain 1998 373 74 dowd 1992 230 i plan to argue that neither view accounts adequately for the 10 tax the first view in particular begs important questions that have gone unaddressed if state banknotes were clearly inferior to national banknotes why was a prohibitive tax needed to drive them out of circulation just how were consumers supposed to benefit from having their choices restricted i explore several responses to these questions and ultimately conclude that consumers considered some state banknotes to be just as desirable as their national bank counterparts i argue that the 10 tax served not to overcome any banknote market failure but to force the withdrawal of relatively high quality state banknotes i then proceed to show that the tax was not needed to secure adequate bond sales to national banks proponents of the tax were striving not to increase the number of applications for national bank charters but to limit growth in the aggregate money stock i conclude by suggesting that because state banks of issue could have accommodated market demands that national banks failed to satisfy consumers might have been better served had state banknotes been allowed to survive ii the chase plan when the first shots of the american civil war were fired at fort sumter the paper currency of the united states consisted of over 200 million in banknotes issued by nearly 1 500 state chartered banks the quality of these banknotes varied according to their issuers management and regulatory environment 1 some banknotes circulated at par only near their source and at fluctuating discounts elsewhere so that persons carrying notes from state to state risked incurring currency exchange losses of the sort borne by international travelers today a few were subject to especially heavy discounts or were refused altogether because their issuers solvency was in question

the impact of conventional and unconventional monetary policy on expectations and sentiment abstract this paper offers evidence on the effect of ecb s conventional and unconventional monetary policy on economic expectations in euro area countries during the us and eu crisis we employ a range of research methodologies in a sample of nine eurozone countries and combine expectations sentiment indicators with a set of macroeconomic and financial variables we find that ecb s conventional monetary policy and fed s monetary policy stance has a positive and significant effect on economic expectations for core eurozone countries and a weak effect on peripheral eurozone countries ecb s unconventional policy measures however have a negative short term effect on core countries economic expectations this result is robust to different methodologies pvar qvar favar and different datasets overall our findings highlight the importance of monetary policy in the determination of economic expectations

time frequency causality and connectedness between international prices of energy food industry agriculture and metals abstract this study analyzes the lead lag relationship between the price indices of energy fuels and each of food industrial inputs agriculture raw materials metals and beverages in the time frequency domain to this end we first use the wavelet coherency and phase differences next we use the diebold and yilmaz 2012 and barunik and krehlik 2017 spillover indices to analyse the connectedness among the set of the price indices under consideration the period of the study is 1990m1 to 2017m5 the wavelet coherency results reveal that there are important and significant relations between the fuel and food prices the fuel and industrial prices and the fuel and metal prices these results also show that there are phase relationships between those paired prices the volatility spillover results indicate that the agricultural sector is the most affected by shocks from the other markets the return series of the industrial input prices at all frequencies appears to be the main source of volatility transmission to the prices of the other commodities over the whole period this finding underlines the relevance of the industrial inputs to policy makers particularly when they design policies to provide incentives related to industrial production

volatility spillover and multivariate volatility impulse response analysis of gfc news events abstractthis article applies two measures to assess spillovers across markets the diebold and yilmaz s 2012 spillover index and the hafner and herwartz s 2006 analysis of multivariate garch models using volatility impulse response analysis we use two sets of data daily realized volatility rv estimates taken from the oxford man rv library for the s p500 and the ftse plus 10 years of daily returns series for the new york stock exchange index and the ftse 100 index both data sets capture both the global financial crisis gfc and the subsequent european sovereign debt crisis esdc the spillover index captures the transmission of volatility to and from markets plus net spillovers the volatility impulse responses virf have to be calibrated to conditional volatility estimated at a particular point in time we explore the impact of three different shocks the onset of the gfc the height of the gfc and the impact of the esdc our modelling includes leverage and asymmetric effects applying a mu

dynamic spillovers of oil price shocks and economic policy uncertainty this study examines the dynamic relationship between changes in oil prices and the economic policy uncertainty index for a sample of both net oil exporting and net oil importing countries over the period 1997 01 2013 06 to achieve that an extension of the diebold and yilmaz 2009 2012 dynamic spillover index based on structural decomposition is employed the results reveal that economic policy uncertainty oil price shocks responds negatively to aggregate demand oil price shocks economic policy uncertainty shocks furthermore during the great recession of 2007 2009 total spillovers increase considerably reaching unprecedented heights moreover in net terms economic policy uncertainty becomes the dominant transmitter of shocks between 1997 and 2009 while in the post 2009 period there is a significant role for supply side and oil specific demand shocks as net transmitters of spillover effects these results are important for policy makers as well as investors interested in the oil market

interdependence between cash crop and staple food international prices across periods of varying financial market stress abstractthis paper investigates the price dynamics between a selection of international staple food and cash crop futures prices this price interaction is particularly relevant for developing coun

measuring financial asset return and volatility spillovers with application to global equity markets we provide a simple and intuitive measure of interdependence of asset returns and or volatilities in particular we formulate and examine precise and separate measures of return spillovers and volatility spillovers our framework facilitates study of both non crisis and crisis episodes including trends and bursts in spillovers and both turn out to be empirically important in particular in an analysis of sixteen global equity markets from the early 1990s to the present we find striking evidence of divergent behavior in the dynamics of return spillovers vs volatility spillovers return spillovers display a gently increasing trend but no bursts whereas volatility spillovers display no trend but clear bursts

time varying co movements between energy market and global financial markets implication for portfolio diversification and hedging strategies abstract this study explores the time patterns of volatility spillovers between energy market and stock prices of seven major global financial markets including clean energy energy information technology corporations equity markets and united states economic policy index over the period vary from december 28 2000 to december 31 2018 we employ a time domain connectedness measures of diebold and yilmaz dy 2009 2012 and 2014 to examine spillover mechanism of volatility shocks across future markets optimal weights and hedge ratios are calculated for portfolio diversification and risk management the main findings of the study conclude that oil shocks are exogenous and contribution of oil market volatility to global financial markets is insignificant the returns of world stock index and world energy index are major transmitters of volatility to clean energy market moreover the impact of energy market become strong in global financial market when data is divided into pre during and post financial crisis periods finally the hedge ratios are volatile over time and their maximum value is observed during the financial crisis period of 2008 09 the optimal portfolio between energy and stock prices are heavily weighted to the stock markets

separating bric using islamic stocks and crude oil dynamic conditional correlation and volatility spillover analysis abstract this paper explores the dynamic conditional correlation and volatility linkage between islamic indexes and oil for bric countries correlations between these assets increase during the global financial crisis for india and china but not for brazil and russia the volatility error forecast variance of all five indexes comes from spillover but is much lower compared to volatility spillover between conventional indexes and oil hedging performance of islamic indexes are superior in india and china compared to conventional indexes in emerging markets an optimal minimum variance portfolio without reducing expected return can be achieved by investing in lower weights of bric islamic indexes and oil compared to conventional indexes

policy uncertainty and international financial markets the case of brexit this study assesses the impact of the brexit probability on both the uk and on international financial markets for the first and the second statistical moments as financial markets are by nature

regional spillover and rising connectedness in china s urban housing prices regional housing prices may be dynamically linked and converge to a long run equilibrium the level of connectedness can be used to describe systemic risk in the housing market this paper uses a r

analyzing time varying volatility spillovers between the crude oil markets using a new method abstract the spillover effect is an important factor affecting the volatility of crude oil price basing on the study of diebold and yilmaz 2009 2012 2014 we propose a new method that calculates the time varying volatility spillover indexes by the generalized forecast error variance decomposition of tvp var sv model then using the new method we study the time varying volatility spillovers between four major crude oil markets wti brent oman tapis from november 29 2002 to july 13 2018 by comparing the results of our new method and traditional rolling window method we verify the superiority of our new method the results show that the volatility spillovers calculated by the new method are clearer more stable and not outlier sensitive from the estimated results of time varying volatility spillovers we find that the volatility spillover between crude oil markets is slowly increasing but there are obvious cyclical changes and from the correlation analysis and the granger causality test we find that the volatility and volatility spillovers are positively correlated and are two way granger causality which supported for the market infection hypothesis of king and wadhwani 1990

the impact of oil price shocks on u s bond market returns abstract this paper examines the effect of the demand and supply shocks driving the global crude oil market on aggregate u s bond index real returns a positive oil market specific demand shock is associated with significant decreases in aggregate bond index real returns for 8 months following the shock a positive innovation in aggregate demand has a negative effect on real bond return that is statistically significant and becomes more adverse over 24 months structural shocks driving the global oil market jointly account for 27 1 of the variation in real bond returns at 24 month horizon a spillover index from rolling svar models is used to identify the interdependence between the oil market and bond returns the mean for this spillover index is 0 381 over 2001 01 2011 12 and 0 476 over september through december 2008 during the height of the global financial crisis

free banking and information asymmetry a traditional argument against free banking is that it will collapse because of information externalities it is impossible for depositors to tell whether a high deposit rate offered by a bank is due to its high efficiency or risky lending strategy this paper shows that in a separating equilibrium a higher quality bank offers a lower deposit rate and holds a smaller proportion of risky loans than a lower quality bank to signal its underlying quality hence free banking is not inherently unstable the empirical results for the hong kong banking system during 1964 65 are consistent with the hypothesis of a separating equilibrium

dynamic interdependence of sovereign credit default swaps in brics and mist countries abstractthis article examines the interactions of emerging markets sovereign credit default swaps cds using a generalized vector autoregressive framework and principal component analysis we find significant spillover effects within the two groups of emerging markets under study using the principal component analysis we show that global financial market factors are important drivers of brics and mist sovereign cds spreads variability focusing on the forecast error variance decomposition most of the spillover effects are documented among the emerging markets cds brazil and mexico contribute the largest net directional spillovers to the other emerging markets studied highlights there exist significant cds spillover effects for mist and brics countries mexico dominates the spillover effects within the mist group while brazil dominates the spillover effects within the brics group as determined by principal component analysis global financial market factors are important drivers of brics and mist sov

time and frequency connectedness among oil shocks electricity and clean energy markets abstract this paper examines the time and frequency connectedness among electricity carbon and clean energy markets and oil price demand and supply shocks in doing so we use the spillover method proposed by diebold and yilmaz 2012 and its extension in the frequency domain by barunik and k ehlik 2018 we find increased connectedness during the global financial crisis as well as in the shale oil revolution period the total connectedness is also higher in the short run compared to the long run due to their low connectedness electricity futures can act as a risk diversifier and safe haven asset against oil shocks net pairwise directional connectedness among oil shocks and the clean energy index is higher during the shale oil revolution these results have important implications for investors with different investment time horizons

volatility in electricity derivative markets the samuelson effect revisited this article proposes an empirical study of the samuelson effect in electricity markets our motivations are twofold first although the literature largely assesses the decreasing pattern in the volatilities along the price curve in commodity markets it has not extensively tested the presence of such a dynamic feature in electricity prices second the analysis of a non storable commodity enriches the literature on the behavior of commodity prices indeed it has been sometimes asserted that the samuelson effect results from the presence of inventories we examine the four most important electricity futures markets worldwide for the period from 2008 to 2014 the german nordic australian and us markets we also use the american crude oil market as a benchmark for a storable commodity negotiated on a mature futures market our analysis has two steps i in addition to the traditional tests we propose and test a new empirical implication of the samuelson effect price shocks should spread from the physical market to the paper market and not the reverse ii based on the concept of indirect storability we investigate the link between the samuelson effect and the storability of the commodity we find evidence of a samuelson effect in all of the electricity markets and show that storage is not a necessary condition for such an effect to appear these results should be taken into account for the understanding of the dynamic behavior of commodity prices for the valuation of electricity assets and for hedging operations

meteor showers or heat waves heteroskedastic intra daily volatility in the foreign exchange market this paper seeks to explain the causes of volatility clustering in exchange rates careful examination of intra daily exchange rates provides a test of two hypotheses heat waves and meteor showers the heat wave hypothesis is that the volatility has only country specific autocorrelation alternatively the meteor shower is a phenomenon of intra daily volatility spillovers from one market to the next using the garch model to specify the heteroskedasticity across intra daily market segments we find that the empirical evidence is generally against the null hypothesis of the heat wave using a volatility type of vector autoregression we examine the impact of news in one market on the time path of per hour volatility in other markets

asymmetric information and optimal bank reserves one traditional argument in favor of bank reserve requirements holds that since a b ank and its depositors are asymmetrically informed as to the bank s reserve position and its portfolio the bank will hold too few reserves and too risky a port folio this being the case presumably a central banking authority is equipped t o impose and to monitor a minimal reserve requirement yielding a pareto superior outcome this paper analyzes this position in the context of a formalmodel and shows that at least for some parameters of the model there is such a case for a minimal reserve requirement copyright 1987 by ohio state university press

intra daily volatility spillovers in international stock markets abstract using a novel four phase model based upon a conditional autoregressive wishart framework for realized variances and covariances we quantify intra daily volatility spillovers within and across the us german and japanese stock markets before and during the subprime crisis we find significant short term spillovers from one stock market to the next trading market which have substantially intensified during the crisis indicating a global volatility contagion coming from the us market the strongest contagion with the largest burst of spillover effects from and to foreign markets is observed for the japanese market which was prior to the crisis fairly uncoupled from the german and us market we also find that the crisis leads to a significant reduction of the general persistence of volatility shocks in international stock markets hence it appears that during the turmoil of the crisis news generating volatility become outdated more quickly than before the crisis

asymmetric volatility connectedness on the forex market abstract we show how bad and good volatility propagate through the forex market i e we provide evidence for asymmetric volatility connectedness on the forex market using high frequency intra day data of the most actively traded currencies over 2007 2015 we document the dominating asymmetries in spillovers that are due to bad rather than good volatility we also show that negative spillovers are chiefly tied to the dragging sovereign debt crisis in europe while positive spillovers are correlated with the subprime crisis different monetary policies among key world central banks and developments on commodities markets it seems that a combination of monetary and real economy events is behind the positive asymmetries in volatility spillovers while fiscal factors are linked with negative spillovers

volatility spillovers between crude oil and chinese sectoral equity markets evidence from a frequency dynamics perspective abstract we examine the frequency dynamics of volatility spillovers between crude oil and china s stock markets in a spectral representation framework of generalized forecast error variance decomposition using sectoral stock indices data we find evidence of total volatility spillover driven mainly by short term spillovers the net spillovers of the oil market are almost all positive and dominated by short ter m components although the spillover during china s 2015 financial crisis is negative and attributable to long term components in addition there exists heterogeneity in net pairwise frequency spillovers between the oil and sectoral stock markets moreover structural breaks in volatilities appear to be a significant feature of volatility spillovers finally frequency spillovers in our system can predict future stock market volatility these results have economic implications for investors and policymakers

the roles of inter fuel substitution and inter market contagion in driving energy prices evidences from china s coal market abstract coal has been dominating energy supply and consumption in china with the country becoming the largest energy supplier and consumer worldwide due to inter fuel substitution of crude oil and inter market contagion of international coal market china s coal price might be interrelated with crude oil price and international coal price however the precise roles of these two effects in determining china s coal price are unknown this paper contributes to previous literature by investigating this issue we find that co movements between china s coal price and crude oil price largely hinge on the shares of oil and coal in china s energy mix while its co movements with international coal price depend on scales of coal trade inter fuel substitution dominated the interaction of china s coal market with other energy types but the importance of inter market contagion has been increasing we also find that china might have become an originator for driving the returns of crude oil and international coal in particular after 2008 furthermore china s coal market is still a net volatility recipient for shocks from both crude oil market and international coal market given the increased integration of global energy markets we anticipate this paper to provide a better understanding on the dynamic changes in china s coal prices

co movements and spillovers of oil and renewable firms under extreme conditions new evidence from negative wti prices during covid 19 we test for the existence of volatility spillovers and co movements among energy focused corporations during the outbreak of the covid 19 pandemic inclusive of the april 2020 events where west texas intermediate wti oil future prices became negative employing the spillover index approach of diebold and yilmaz 2012 as well as developing a dcc figarch conditional correlation framework and using estimated spillover indices built on a generalised vector autoregressive framework in which forecast error variance decompositions are invariant to the variable ordering we examine the sectoral transmission mechanisms of volatility shocks and contagion throughout the energy sector among several results we find positive and economically meaningful spillovers from falling oil prices to both renewable energy and coal markets however this result is only found for the narrow portion of our sample surrounding the negative wti event we interpret our results being directly attributed to a sharp drop in global oil gas and coal demand rather than because of a sudden increase in oil supply while investors observed the us fracking industry losing market share to coal they also viewed renewables as more reliable mechanism to generate long term stable and low cost supply

international spillovers of policy uncertainty using the baker et al 2013 index of policy uncertainty for six developed countries this paper estimates spillovers of policy uncertainty we find that spillovers account for slightly more than one fourth of the dynamics of policy uncertainty in these countries with this share rising to one half during the financial crisis the us and uk are responsible for a large fraction of the spillovers since the financial crisis while the remaining countries are all net receivers of policy uncertainty shocks during and after this period

measuring interconnectedness between financial institutions with bayesian time varying vector autoregressions we propose a market based framework that exploits time varying parameter vector autoregressions to estimate the dynamic network of financial spillover effects we apply it to financials in the standard poor s 500 index and estimate interconnectedness at the sectoral and institutional levels at the sectoral level we uncover two main events in terms of interconnectedness the long term capital management crisis and the 2008 financial crisis after these crisis events we find a gradual decrease in interconnectedness not observable using the classical rolling window approach at the institutional level our framework delivers more stable interconnectedness rankings than other comparable market based measures

on international uncertainty links bart based empirical evidence for canada we use the indexes of economic policy uncertainty epu developed by baker et al 2015 for canada and seven china france germany japan russia united kingdom and united states other countries to study international uncertainty links by means of a bayesian additive regression trees bart algorithm using partial dependence plots relative importance measures and permutation tests we shed light on how epu in canada is linked to epu in seven other countries

bioeconomic diversity dynamics of a marine ecosystem this paper models the bio economic diversity dynamics of a marine ecosystem made up by its entire commercial fish species and from the fitted model obtains a quantitative measure of its resilienc

are volatility spillovers between currency and equity market driven by economic states evidence from the us economy this study examines the volatility spillovers between the foreign exchange rate markets of three of the usa s major trading partners and the us stock market utilizing the forecast error variance decomposition framework of a var model proposed by diebold and yilmaz 2009 the empirical results based on a data set covering the period 1986 2014 suggest that the level of total volatility spillover effects is high only when they precede periods of economic turbulence if the economy is quiet volatility spillover effects are virtually non existent

the dynamics of spillover effects during the european sovereign debt turmoil abstract in this paper we modify and extend the framework of diebold and yilmaz 2011 to quantify spillovers between sovereign credit markets and banks in the euro area spillovers are estimated recursively from a vector autoregressive model of daily changes in credit default swap cds spreads with exogenous common factors we account for interdependencies between sovereign and bank cds spreads and derive generalized impulse response functions specifically we assess the systemic effect of an unexpected shock to the creditworthiness of a sovereign or country specific bank index on other sovereigns and bank cdss between october 2009 and july 2012 channels of shock transmission from or to sovereigns and banks are summarized in a contagion index and its four components i among sovereigns ii among banks iii from sovereigns to banks and iv from banks to sovereigns we also highlight the impact of policy related events on the contagion index