trading patterns and prices in the interbank foreign exchange market the behavior of quote arrivals and bid ask spreads is examined for continuously recorded deutsche mark dollar exchange rate data over time across locations and by market participants a pattern in the intraday spread and intensity of market activity over time is uncovered and related to theories of trading patterns models for the conditional mean and variance of returns and bid ask spreads indicate volatility clustering at high frequencies the proposition that trading intensity has an independent effect on returns volatility is rejected but holds for spread volatility conditional returns volatility is increasing in the size of the spread there is a growing body of theoretical studies on the pattern of trading activity in financial markets with implications for the time series behavior of transactions prices and intensity of trading the empirical literature addressing similar concerns using intraday market data appropriate for such tasks is sparse particularly in the area of the trading of currencies the purpose of this paper is to examine both international patterns of intraday trading activity and the time series properties of returns and bid ask spreads for the deutsche mark dollar exchange rate in the interbank foreign exchange market the goal is to provide information useful in the further development of market microstructure models of trading and to compare empirical findings against theoretical results already in existence the foreign exchange market is in operation twenty four hours a day seven

the transactions demand for money in a two currency economy abstract in this paper the model of the transactions demand for money of baumol 1952 is extended to an economy where transactions are conducted in two currencies the currency substitution hypothesis that the domestic demand for domestic money depends on the expected rate of depreciation as well as the domestic rate of interest and level of income is derived from the model in addition several new insights into the implications of currency substitution are provided

currency substitution and western european monetary unification the recent history of european monetary affairs may be interpreted as a slow movement towards the establishment of a european currency union characterized by fixed exchange rates and perhaps eventually a common european currency until very recently the desirability of european monetary union was analysed in terms of the traditional optimum currency area framework in that analysis the incentive for currency union comes from the potential improvements in efficiency in resource allocation from the use of a single money in a trade area recently however the question of the independence of monetary policy under flexible exchange rates has spawned a growing literature on currency substitution which includes implications for currency 2 union the earlier work suggested that a major benefit of flexible rates would be the liberation of domestic monetary policy from external balance concerns so that policy could be aimed singularly at internal balance 3 the currency substitution cs literature has demonstrated that if the currencies of two countries are close substitutes to money demanders then the central banks of these countries cannot follow independent monetary policies even under flexible exchange rates 4 the degree of currency substitution is an important empirical question and the analysis that follows should prove informative in determining the incentive for european monetary union is the european monetary system ems goal of reducing exchange rate fluctuations necessarily indicative of a european sensitivity to disturbances with a substantial part of the problem coming from substitution between monies girton and roper 1980 p 157 or rather a result of the traditional drive towards integration as envisioned by optimum currency area theory the following sections will suggest an answer

the effects of macroeconomic news on high frequency exchange rate behavior this paper studies the high frequency reaction of the dem usd exchange rate to publicly announced macroeconomic information emanating from germany and the u s by us ing data sampled at a five minute frequency we are able to identify significant impacts of most announcements on the exchange rate change in the 15 minutes post announcement although the significance of these effects decreases rapidly as the interval over which the post announcement change in exchange rates is increased the direction of the exchange rate response conforms in general with a reaction function interpretation whereby reac tions to macroeconomic news are driven by the likely operations of monetary authorities in domestic money markets further we detect influences of german monetary policy deci sions on the reaction of the exchange rate and also differences between u s and german announcements in the exchange rate reaction time pattern i introduction this paper studies the high frequency reaction of the dem usd exchange rate to macroeconomic information emanating from germany and the u s specif ically we utilize exchange rate data covering the period 1 1 92 to 31 12 94 sam pled at a five minute frequency to investigate how the major monthly macroe conomic releases from these two countries impact the dem usd the infor mation contained in announcements over this three year period is extracted via a set of market expectation series supplied by money market services interna tional mms 1 our analysis improves on previous work in this area in two main respects first our study is conducted using very high frequency data whereas most earlier work has used exchange rate data sampled at a frequency of a number of hours or more this allows us to construct a very precise characterization of

u s intervention assessing the probability of success this paper estimates the unconditional and conditional probabilities that u s interventions successfully smooth short term mark dollar and yen dollar exchange rates the sample period extends from february 1987 to february 1990 assuming a binomial distribution the number of observed successes usually is greater than one would expect to see randomly results from a logit model suggest that coordinated intervention has a higher probability of success than unilateral intervention the probability of success also increases with the dollar amount of an intervention other conditioning variables are not significant the paper presents a reaction function with adjustments for the incidentally truncated nature of intervention data predicted values serve as instruments for intervention in the logit models

roughing it up including jump components in the measurement modeling and forecasting of return volatility a rapidly growing literature has documented important improvements in financial return volatility measurement and forecasting via use of realized variation measures constructed from high frequency returns coupled with simple modeling procedures building on recent theoretical results in barndorff nielsen and shephard 2004a 2005 for related bi power variation measures the present paper provides a practical and robust framework for non parametrically measuring the jump component in asset return volatility in an application to the dm exchange rate the s p500 market index and the 30 year u s treasury bond yield we find that jumps are both highly prevalent and distinctly less persistent than the continuous sample path variation process moreover many jumps appear directly associated with specific macroeconomic news announcements separating jump from non jump movements in a simple but sophisticated volatility forecasting model we find that almost all of the predictability in daily weekly and monthly return volatilities comes from the non jump component our results thus set the stage for a number of interesting future econometric developments and important financial applications by separately modeling forecasting and pricing the continuous and jump components of the total return variation process

a nonparametric distribution free test for serial independence in stock returns a fundamental statistical test of serial independence is developed and applied to daily stock returns let xt be the deviation of the daily return on a stock from its sample mean after any autocorrelation present has been removed if xt is serially independent then the cumulative sum of xt over time is the position of a one dimensional random walk on a line the empirical distribution of step lengths over a large sample allows the distribution ofthe largest absolute excursion in a f step walk to be calculated by repeated simulation the observed maximal excursions are found to be significantly smaller than one would expect based on serial independence and the observed distribution of step lengths it is concluded that these daily stock returns are not serially independent and that the market value of the corporations studied has a tendency to return to an interval around the trend value

identifying the efficacy of central bank interventions evidence from australia and japan abstract using a model incorporating the endogenous relationship between exchange rates and intervention we show how a change in central bank policy can be used as an identification assumption estimating this model with simulated gmm for daily data from australia and japan we find that a us 100 million purchase appreciates the australian dollar by 1 3 1 8 but the yen by just 0 2 almost all of the impact of an intervention occurs during the day it is conducted and we confirm that central banks typically lean against the wind

a new method for identifying the effects of foreign exchange interventions central banks react even to intraday changes in the exchange rate however in most cases intervention data is available only at a daily frequency this temporal aggregation makes it difficult to identify the effects of interventions on the exchange rate we apply the bayesian mcmc approach to this endogeneity problem we use data augmentation to obtain intraday intervention amounts and estimate the efficacy of interventions using the augmented data applying this new method to japanese data we find that an intervention of one trillion yen moves the yen dollar rate by 1 7 percent which is more than twice as much as the magnitude reported in previous studies applying ols to daily observations this shows the quantitative importance of the endogeneity problem due to temporal aggregation

the effectiveness of central bank intervention in the ems the post 1993 experience abstract we analyze the effectiveness of intervention in the european monetary system by using data on the dem intervention activity of six european central banks covering the period from august 1993 to april 1998 to allow for regime specific intervention effects we estimate markov switching autoregressive conditional heteroscedasticity models we find that interventions have only limited effects on the conditional means and variances

real time effects of central bank interventions in the euro market abstract this paper investigates the real time effects of sterilized foreign exchange intervention using official intraday intervention data provided by the danish central bank our analysis employs a two step weighted least squares estimation procedure we control for macro surprises address the issue of endogeneity and carry out an array of robustness tests only when the direction of intervention is consistent with the monetary policy stance do we find that intervention exerts a significant influence on exchange rate returns

deutsche mark dollar volatility intraday activity patterns macroeconomic announcements and longer run dependencies this paper provides a detailed characterization of the volatility in the deutsche mark dollar foreign exchange market using an annual sample of five minute returns the approach captures the intraday activity patterns the macroeconomic announcements and the volatility persistence arch known from daily returns the different features are separately quantified and shown to account for a substantial fraction of return variability both at the intraday and daily level the implications of the results for the interpretation of the fundamental driving forces behind the volatility process is also discussed the efficient market hypothesis contends that financial asset prices provide rational assessments of fundamental values and future payoffs by implication price changes should reflect the arrival and processing of all relevant new information however the proportion of return variability that can be ascribed to public news announcements is low for example cutler poterba and summers 1989 find that even the largest daily price changes in the stock market generally cannot be associated with any significant economic news 1 moreover proxies for the flow of public information e g the number of news items released by reuter s news service berry and hiowe 1994 or dow jones company mitchell and mulherin 1994 explain little of the overall variation thus if private information is ruled out proponents of rational price formation have to assert the existence of important news items

a nonparametric distribution free test for serial independence in stock returns a correction a fundamental statistical test of serial independence developed by ashley and patterson 1986 to examine a possible form of serial dependence in daily stock returns is shown to be improperly constructed as a consequence the significance probabilities that they ob tain are overstated this paper presents a corrected version of their test the test statistic obtained after correction is shown to possess the same limiting distribution as the kolmogorov smirnov test statistic applying the corrected test procedure to data identical to that used by ashley and patterson we find that their original null hypothesis can no longer be rejected at conventional significance levels

currency substitution and the demand for money some evidence for canada recently the possibility that foreign and domestic currencies are substitutes has received considerable attention see 1 2 3 10 19 21 currency substitution has important implications for the working of flexible exchange rates if the degree of currency substitution is high small changes in the money supply would induce large changes in the exchange rate furthermore currency substitution would transmit the effect of monetary disturbances from one country to another indeed significant currency substitution would seriously undermine the ability of flexible exchange rates to provide monetary independence this paper examines the empirical importance of currency substitution in the framework of the demand function for money if currency substitution is important the expected change in the exchange rate should be a significant determinant of the demand for home currency in section 2 we undertake such a test for the canadian demand for money during the recent flexible exchange rate period there is considerable evidence that the forward exchange rate is a good measure of the expected exchange rate our own tests confirm these results for canadian data since 1970

on the inadequacy of newswire reports for empirical research on foreign exchange interventions abstract reuters news reports have become an accepted tool for empirical studies analyzing informational asymmetries in fx markets this paper tests the accuracy of the reuters reports for swiss interventions in the foreign exchange market the evidence finds that the time stamp of the reuters reports does not always lie near the recorded time of the first intervention trade as is commonly assumed in market microstructure studies the standard deviation of the time difference is measured in hours and not in minutes these and other regression results question the accuracy of reuters reports for swiss interventions

intraday effects of foreign exchange intervention by the bank of japan abstract we examine the effects of intervention by the bank of japan using intraday data from oct 1 1992 to sept 30 1993 news related to the bank of japan s intervention in the jpy market was retrieved from reuters headlines we find that jpy volatility varies significantly differently across periods from 1 h before to 1 h after reuters intervention reports results from arch models show that intervention by the bank of japan has a positive and significant impact on jpy volatility particularly at high frequencies 5 and 10 min intervals we also find that our intervention proxy has the largest effect upon high frequency volatility 30 to 45 min prior to reuters reports

nonfundamental uncertainty and exchange rates this paper shows that there can be equilibria in which exchange rates display randomness unrelated to fundamentals this is demonstrated in the context of a two currency one good model with three agent types and cash in advance constraints a crucial feature is that the type i agents for i 1 2 must satisfy a cash in advance constraint by holding currency i while type 3 agents can satisfy it by holding either currency it is shown that real allocations vary across the multiple equilibria if markets for hedging exchange risk do not exist and that the randomness is innocuous if complete markets exist

the intraday effects of central bank intervention on exchange rate spreads abstract we investigate the intraday effects of intra marginal intervention in a horizontal band on the exchange rate spread official intraday data on danish intervention transactions in the erm ii the exchange rate mechanism of the european union facilitates our analysis we show that intervention purchases and sales both exert a significant influence on the exchange rate spread but in opposite directions intervention purchases of the small currency on average narrow the spread while intervention sales of the small currency on average widen the spread this is a novel finding that differs from those of existing studies that find intervention always widens the exchange rate spread and increases market uncertainty

is foreign exchange intervention effective some microanalytical evidence from the czech republic abstract i estimate a two equation system on the czech koruna euro exchange rate and order flow at hourly frequency with transactions data from the reuters spot matching market in the second half of 2002 during which the czech national bank intervened to stem the appreciation of the koruna i find a significant impact of order flow on the exchange rate equal to 7 6 basis points per 10 million of which 80 persists throughout the day the news of intervention increases the price impact of order flow by 3 9 basis points per 10 million the order flow equation yields inconclusive results

large versus small foreign exchange interventions abstract we use non temporal threshold analysis to investigate the exchange rate effects of large versus small interventions more than two decades of official daily data on intervention in the jpy usd market facilitate our analysis we find no evidence that small interventions exert a discernible influence on the exchange rate while large interventions significantly influence the exchange rate in the theoretically consistent manner we conclude that small interventions may not be considered a determinant of the exchange rate while large interventions constitute an important element in our understanding and modeling of the exchange rate

currency substitution and speculative attacks on a currency board system abstract a currency board arrangement cba is supposed to be robust against attacks currency substitution complicates life with controversial implications for floating versus fixed exchange rate regimes after reporting evidence of currency substitution in hong kong a monetary model incorporating currency substitution is used to estimate the shadow exchange rate and the probability of speculative attack on the hong kong dollar a decomposition analysis of a markov switching model indicates that the no attack regime was the most durable one this implies that hong kong s quasi cba was relatively robust against both speculative attacks and currency substitution

a nonparametric distribution free test for serial independence in stock returns a comment we have confirmed that corrado and schatzberg s 1990 criticism of our test for serial independence in stock returns ashley and patterson 1986 is correct the corrected results still favor rejection of the null hypothesis that the daily returns for several stocks notably holly sugar hly and e systems esy are serially independent but only at the 12 percent and 14 percent significance levels respectively evidently this kind of test is long on simplicity and intuitive appeal but short on power

the role of money supply shocks in the short run demand for money abstract previous money demand models are either inconsistent with contemporaneous adjustment of the price level to expected changes in the nominal money supply or imply implausible interest rate fluctuations in response to innovations in nominal money we propose a shock absorber money demand model in which money supply shocks affect the synchronization of asset transactions and so engender a temporary increase or decrease in desired money holdings expected changes do not engender such fluctuations in real money inventories in simultaneous estimates for eight industrial countries the shock absorber model proved empirically superior

the market microstructure of central bank intervention abstract how quickly do central bank intervention operations impact the foreign exchange market and do intra daily market conditions influence the effectiveness of central bank interventions this paper uses high frequency intra daily data to examine the relationship between the efficacy of intervention operations and the state of the market at the moment that the operation is made public the results indicate that some traders typically know that the fed is intervening at least 1 h prior to the public release of the information in newswire reports also the evidence suggests that the timing of intervention operations matters interventions that occur during heavy trading volume that are closely timed to scheduled macro announcements and that are coordinated with another central bank are the most likely to have large effects

gmm estimates of currency substitution between the canadian dollar and the u s dollar this paper investigates the empirical strength of currency substitution between the canadian dollar and the u s dollar euler equations implied by a small open economy money in the utility function model are estimated and tested by hansen s generalized method of moments procedure the major empirical finding is that both the elasticity of currency substitution and the share of u s currency in the production of canadian liquidity services are economically small even though the combined domestic and u s real balances appear to provide statistically significant economizing on transactions costs copyright 1994 by ohio state university press

measurement error and the profitability of interventions a closer look at snb transactions data abstract several studies argue that central bank profits from foreign exchange interventions should be calculated using daily data the rationale is that intra month exchange rate volatility is larger than the intra day volatility this note tests this hypothesis with transactions data

competitive interest payments on bank deposits and the long run demand for money reply this paper tests two assumptions made in previous demand for money studies the first assumption concerns the role assigned to the interest rate in the demand for money function common practice identifies the rate of interest with the opportunity cost of holding money in section i this formulation is shown to blur an important distinction between the price of money and the price of money substitutes and to implicitly assume that the relevant price variable is the difference between these two distinct prices a second assumption is that the current ban on interest payments on demand deposits is fully effective in section ii i operationally define these price variables and estimate perfectly competitive interest payments on commercial bank deposits this is done by crudely measuring commercial bank marginal costs and assuming that all excess profit is passed on to depositors in indirect ways section iii presents estimates of a more complete longrun demand for money relationship which explicitly includes an own price and a cross price as separate influences and assumes that the prohibition of the payment of interest on deposits is totally ineffective although no firm conclusion is reached concerning the proper functional specification of the demand function the results significantly improve upon previous demand for money estimates which assumed that the interest payment prohibition is totally effective in section iv the results are summarized and implications of the analysis for monetary theory are presented my competitive demand for money formulation leads to a reinterpretation of the existing evidence on what is generally referred to as the interest elasticity of demand for money this estimate is shown to be significantly biased downward it also implies that the demand for and supply of money are more interdependent than is usually assumed

exchange rate effects of central bank interventions an analysis of transaction prices the impact of sterilised interventions by the swiss national bank on the swiss franc u s dollar exchange rate is examined for the 1986 94 period the paper extends results from earlier studies by using the actual prices of interventions based on the fact that all swiss national bank interventions are announced our test exploits the informational differences between interventions and customer transactions a key finding is that only initial interventions matter customer transactions and subsequent interventions have no influence when the bretton woods system of fixed exchange rates broke up in the early 1970s central banks continued to intervene on the foreign exchange market in the meantime a substantial literature has emerged that focuses on the effectiveness of official interventions this literature has been summarised by edison 1993 and almekinders 1995 chapter 3 its central policy issue is whether sterilised interventions defined as interventions that leave the monetary base unchanged can have a significant influence on exchange rate behaviour macroeconomic theory proposes various channels for interventions to operate through but the empirical evidence accumulated over the years is less encouraging it suggests that there is no permanent effect of sterilised interventions on the exchange rate more surprisingly perhaps even shortterm effects are hard to pin down the evidence is weak and sample dependent at best in most cases coefficients are either insignificant or have the wrong sign see almekinders 1995 chapter 6 baillie and humpage 1992 dominguez 1998 dominguez and frankel 1993 klein and rosengren 1991 lindberg 1994 and osterberg and wetmore humes 1995 during the last decade the bulk of the empirical research has concentrated on the analysis of daily or weekly data this line of research which adopts the view that exchange rate markets are highly efficient was stimulated by the decision of the federal reserve board and the deutsche bundesbank to make their daily intervention data available to outside researchers to rationalise the gap between the fragile empirical evidence and the manifest interest paid by the media and other observers to interventions various explanations have been offered in this paper we stress two measurement problems first there is the problem of properly defining the exchange rate change in the regression analysis since intervention exchange rates are not available the

communicating policy options at the zero bound abstract this paper examines a special episode in communication practices of the swiss national bank snb when short term interest rates reached the zero bound non sterilized foreign exchange interventions were frequently mentioned as a potential instrument we ask how the financial markets responded to the snb s repeated references of non sterilized interventions the empirical results with high frequency data provide strong evidence that snb intervention references depreciated the domestic currency for several hours the case study supports the view that communication is an effective tool for monetary policy in unusual situations as well

a transaction level study of the effects of central bank intervention on exchange rates abstract we study the effects of sterilised intervention operations executed on behalf of the swiss national bank snb using tick by tick transactions data between 1986 and 1995 we extend the preliminary analysis of economic journal 109 1999 662 by matching these data with indicative intra day exchange rate quotes and news wire reports of central bank activity using an event study approach we find that intervention has important short run effects on exchange rate returns in particular among various results we find that i intervention has a stronger impact when the snb moves with the market and when its activity is concerted with that of other central banks and ii exchange rate returns move in the 15 min interval prior to interventions

exchange rate management in emerging markets intervention via an electronic limit order book this paper describes and analyzes the implementation of a crawling exchange rate band on an electronic trading platform the placement of limit orders at the central bank s target rate serves as a credible policy statement that may coordinate beliefs of market participants we find for our sample that intervention increases exchange rate volatility and spread for the next minutes but that intervention days show a lower degree of volatility and spread than non intervention days we also show for intraday data that the price impact of interbank order flow is smaller on intervention days than on non intervention days these stabilizing effects however rely on the conditions of large currency reserves and the existence of capital controls an electronic market seems to support this goal

when do central bank interventions influence intra daily and longer term exchange rate movements this paper examines dollar interventions by the g3 since 1989 and the reasons that trader reactions to these interventions might differ over time and across central banks market microstructure theory provides a framework for understanding the process by which sterilized central bank interventions are observed and interpreted by traders and how this process in turn might influence exchange rates using intra daily and daily exchange rate and intervention data the paper analyzes the influence of interventions on exchange rate volatility finding evidence of both within day and daily impact effects but little evidence that interventions influence longer term volatility

do sales of foreign exchange reserves lead to currency appreciation we employ novel time stamped reserve sales data provided by the czech national bank cnb to carry out a time series analysis of the exchange rate implications of czech reserve sales aimed at mitigating valuation losses on euro denominated assets the sales were explicitly not intended to influence the value of the koruna relative to the euro the period under study includes a well defined regime change in the cnb s approach to reserves sales allowing us to address whether the manner in which the sales are carried out matters for their influence on the relative value of the domestic currency we find little evidence that reserve sales influence the exchange rate when sales are carried out on a discretionary and relatively infrequent basis however when the sales are carried out daily we find a statistically and economically significant appreciation of the domestic currency follows