have trading rule profits in the currency markets declined over time abstract previous studies have reported mixed results regarding the success of technical trading rules in currency markets abnormal returns were observed in many studies using data up to the mid 1980s while more recent studies generally report less success for technical trading rules this paper tests whether moving average trading rule profits have declined over the period from 1971 to 2000 if so previous profits may represent a temporary inefficiency that has since been eliminated in the currency markets the hypothesis is tested using 18 exchange rate series over a longer time period than in previous studies rules are optimized for successive 5 year in sample periods from 1971 to 1995 and tested over subsequent 5 year out of sample periods results show that risk adjusted trading rule profits have declined over time from an average of over 3 in the late 1970s and early 1980s to about zero in the 1990s thus market inefficiencies reported in previous studies may have been only temporary inefficiencies

regime switches in exchange rate volatility and uncovered interest parity abstract we use a regime switching model to examine how exchange rate volatility is related to the failure of uncovered interest parity main findings are as follows first exchange rate returns are strongly influenced by regime switches in the relationship between the returns and interest rate differentials second low yielding currencies appreciate less frequently but once it occurs their movements are faster than when they depreciate third depreciation of low yielding currencies and low volatility are mutually dependent on each other finally these three findings are more evident for shorter horizons the second and third results are consistent with a market participants view short term carry trades in a low volatility environment and their rapid unwinding substantially influence exchange rates we consider the effects of funding liquidity to explain these results

are all central bank interventions created equal an empirical investigation abstract this study investigates the relationship between central bank interventions and technical trading rule profitability in the spot foreign exchange market because interventions are not necessarily exogenous events we analyze the relationships between interventions by the g 3 central banks financial market conditions changes in monetary policy and technical trading profitability by considering announced unannounced unilateral and coordinated interventions separately we provide more insight into the interrelationships between these factors than previous studies we find that the level of technical trading profits and market uncertainty increase preceding and remain high during interventions especially announced and coordinated but decrease afterward a preliminary investigation of the possible role of a time varying risk premium around interventions cannot be rejected

how should control theory be used to calculate a time consistent government policy we study different solutions to a simple one dimensional linear quadratic game with a large number of private agents and a government a time consistent solution is defined as a solution to the hamilton jacobi bellman equation i e as a policy for which the government has noprecommitment capability this solution is compared to a policy where the government has an instantaneous pre commitment i e an equilibrium in which the government has a period by period leadership in both cases we show how control theory should be applied to calculate the equilibrium and how to relate these equilibria to the differential game literature

on the role of demand and strategic uncertainty in capacity investment and disinvestment dynamics abstract even mature industries seldom settle down into a long run steady state fluctuations in demand disrupt the status quo and call for firms to adjust their capacities on an ongoing basis we construct a fully dynamic model of an oligopolistic industry with lumpy capacity and lumpy investment disinvestment decisions in addition to uncertainty about the evolution of demand a firm faces strategic uncertainty concerning the decisions of its rivals we numerically solve the model for its markov perfect equilibria for one set of parameter values three equilibria exist and while all of them have simple intuitive structures they exhibit widely varying patterns of response to demand shocks at one extreme one firm dominates the industry almost as a monopolist and changes its capacity to accommodate demand at the other extreme the larger firm keeps its capacity nearly constant while the smaller firm acts as the swing producer

uncertain regulatory timing and market dynamics abstract using a dynamic model of capacity accumulation i examine the relationship between uncertainty about the timing of a new pigouvian tax and oligopolistic competition i find that for some market structures uncertainty about the timing of the regulatory change leads firms to increase investment these results stem from the nature of the uncertainty and its interaction with firms strategic incentive to engage in capacity races they dramatize the importance of accounting for initial conditions when forecasting firms reactions to anticipated regulatory changes in addition i find that more protracted uncertainty leads to greater welfare costs

can markov switching models replicate chartist profits in the foreign exchange market abstract in this paper we show that the markov switching model is a relevant statistical alternative to the classical martingale model for exchange rates by extending the standard markov switching model we decisively reject the martingale model moreover the model generates autocorrelations and linear structures in line with what is observed in reality subsequently we test whether this model can explain chartist profits we find that the extended markov switching model is able to explain the profitability of a simple ma 30 rule finally we decompose the profitability of the ma 30 rule into a linear and nonlinear part we find that although the implied linear structure of the markov model explains a substantial part of the profitability part of the profits of the ma 30 rule can be attributed to the specific nonlinearities implicit in the markov model

racing with uncertainty and strategic interaction between competitors as the race unfolds most of the existing literature examines one or other of these features but not the two combined our aim is to see how the efforts of competitors in a race vary with the intensity of rivalry between them in our principal model whch is of a one dimensional race it is shown that the leader in the race makes greater efforts than the follower and efforts increase as the gap between competitors decreases under certain conditions the same results hold in our second related model which is of a two dimensional race

can the markov switching model forecast exchange rates abstract a markov swirching model is fit for 18 exchange rates at quarterly frequencies the model fits well in sample for many exchange rates by the mean squared error criterion the markov model does not generate superior forecasts to a random walk or the forward rate there appears to ne some evidence that the forecasts of the markov model are superior at predicting the direction of change of the exchange rate

home bias in equity portfolios inflation hedging and international capital market equilibrium we test whether the home bias in equity portfolios is caused by investors trying to hedge inflation risk the empirical evidence is consistent with this motive only if investors have very high levels of risk tolerance and equity returns are negatively correlated with domestic inflation we then develop a model of international portfolio choice and equity market equilibrium that integrates inflation risk and deadweight costs using this model we estimate the levels of costs required to generate the observed home bias in portfolios consistent with different levels of risk aversion for a level of risk aversion consistent with standard estimates of the domestic equity market risk premium these costs are about a few percent per annum greater than observable costs such as withholding taxes thus the home bias cannot be explained by either inflation hedging or direct observable costs of international investment unless investors have very low levels of risk aversion article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

time varying risk premia volatility and technical trading rule profits evidence from foreign currency futures markets abstract this paper re examines the efficiency of foreign currency futures markets by evaluating the role of time varying risk premia and volatility in explaining technical trading rule profits the results show that large parts of the technical rule profits can be explained by the time varying risk premia estimated from a general model for the conditional capm the bootstrap distributions for the profits under the null model average one third to one half of the actual profits and enclose the actual profits well within the 90 confidence intervals time varying conditional volatility explains an additional 10 of the profits

a trading approach to testing for predictability we propose a market timing test for conditional mean independence of financial returns the new excess predictability ep test statistic has an interpretation of a properly normalized return of a certain trading strategy we discuss similarities of the ep test to the popular directional accuracy da test of pesaran and timmermann power properties of the ep test are advantageous and size properties are comparable to those of the da test we illustrate application of the test using weekly data on the s p500 index

computable markov perfect industry dynamics we provide a general model of dynamic competition in an oligopolistic industry with investment entry andexit toensurethatthereexistsacomputationallytractablemarkov perfectequilibrium we introduce firm heterogeneity in the form of randomly drawn privately known scrap values and setup costs into the model our game of incomplete information always has an equilibrium in cutoff entry exit strategies in contrast the existence of an equilibrium in the ericson and pakes model of industry dynamics requires admissibility of mixed entry exit strategies contrary to the assertion in their article that existing algorithms cannot cope with in addition we provide a condition on the model s primitives that ensures that the equilibrium is in pure investment strategies building on this basic existence result we first show that a symmetric equilibrium exists under appropriate assumptions on the model s primitives second we show that as the distribution of the random scrap values setup costs becomes degenerate equilibria in cutoff entry exit strategies converge to equilibria in mixed entry exit strategies of the game of complete information

using survey data to test standard propositions regarding exchange rate expectations survey data provide a measure of exchange rate expectations superior to the forward rate in that no risk premium interferes we estimate extrapolative adaptive and regressive models of expectations static or random walk expectations and bandwagon expectations are rejected current appreciation generates the expectation of future depreciation because variables other than the contemporaneous spot rate receive weight in comparing expectations to the process governing the spot rate we find statistically significant bias no variable is as ubiquitous in international financial theory and yet as elusive empirically as investors expectations regarding exchange rates in the past expectations have been modeled in an ad hoc way often by using the forward exchange rate there is however a serious problem with using the forward discount as the measure of the expected change in the exchange rate in that the two may not be equal the gap that may separate the forward discount and expected depreciation is generally interpreted as a risk premium most of the large empirical literature testing the unbiasedness of the forward exchange rate for example has found it necessary either arbitrarily to assume away the existence of the risk premium if the aim

exit with multiplant firms using an extension of ghemawat and nalebuff s 1985 model i analyze the outcome of industry decline when firms have multiplant operations the analysis reveals that no natural generalization of their strong empirical prediction that the larger of two single plant duopolists exits first holds in a multiplant setting the results also highlight a number of factors that affect the pattern of capacity removal during industry decline and lead to a discussion of the strategic implications of firms plant size choices in general the factors determining the pattern of capacity reduction can be quite complex and prediction in such settings often requires intimate knowledge of industry structure

the significance of technical trading rule profits in the foreign exchange market a bootstrap approach abstract in this paper we present new evidence on the profitability and statistical significance of technical trading rules in the foreign exchange market we utilize a new data base currency futures contracts for the period 1976 1990 and we implement a new testing procedure based on bootstrap methodology our results suggest that simple technical trading rules have very often led to profits that are highly unusual splitting the entire sample period into three 5 year periods reveals that on average the profitability of some trading rules declined in the latest period although profits remained positive on average and significant in many cases jel f31 f47 g15

using genetic algorithms to find technical trading rules1 abstract we use a genetic algorithm to learn technical trading rules for the s p 500 index using daily prices from 1928 to 1995 after transaction costs the rules do not earn consistent excess returns over a simple buy and hold strategy in the out of sample test periods the rules are able to identify periods to be in the index when daily returns are positive and volatility is low and out when the reverse is true these latter results can largely be explained by low order serial correlation in stock index returns

lessons from the evolution of foreign exchange trading strategies abstract the adaptive markets hypothesis posits that trading strategies evolve as traders adapt their behavior to changing circumstances this paper studies the evolution of trading strategies for a hypothetical trader who chooses portfolios from foreign exchange forex technical rules in major and emerging markets the carry trade and us equities the results show that a backtesting procedure to choose optimal portfolios improves upon the performance of nonadaptive rules we also find that forex trading alone dramatically outperforms the s p 500 with much larger sharpe ratios over the whole sample but there is little gain to coordinating forex and equity strategies which explains why practitioners consider these tools separately forex trading returns dip significantly in the 1990s but recover by the end of the decade and have been markedly superior to an equity position since 1998 overall trading rule returns still exist in forex markets with substantial stability in the types of rules though they have migrated to emerging markets to a considerable degree

investment with uncertain tax policy does random tax policy discourage investment we consider the impact of tax policy uncertainty on firm level and aggregate investment comparing investment behaviour when uncertainty is due to a shock following geometric brownian motion gbm versus when random discrete jumps in tax policy occur expectations of the likelihood of a tax policy switch have an important negative impact on the gain to delaying investment in the latter model and time to investment can fall with increasing tax policy uncertainty aggregate investment simulations indicate that capital formation is adversely affected by increases in uncertainty in the traditional gbm model but can be enhanced in the jump process model

capacity dynamics and endogenous asymmetries in firm size empirical evidence suggests that there are substantial and persistent differences in the sizes of firms in most industries we propose a dynamic model of capacity accumulation that is consistent with the observed facts the model highlights the mode of product market competition and the extent of investment reversibility as key determinants of the size distribution of firms in an industry in particular if firms compete in prices and the rate of depreciation is large then the industry moves toward an outcome with one dominant firm and one small firm industry dynamics in this case resemble a preemption race contrary to the usual intuition this preemption race becomes more brutal as investment becomes more reversible

a hybrid stock trading system using genetic network programming and mean conditional value at risk abstract this paper describes a hybrid stock trading system based on genetic network programming gnp and mean conditional value at risk model gnp cvar the proposed method combining the advantages of evolutionary algorithms and statistical model has provided useful tools to construct portfolios and generate effective stock trading strategies for investors with different risk attitudes simulation results on five stock indices show that model based on gnp and maximum sharpe ratio portfolio performs the best in bull market and that based on gnp and the global minimum risk portfolio performs the best in bear market the portfolios constructed by markowitz s mean variance model performs the same as mean cvar model it is clarified that the proposed system significantly improves the function and efficiency of original gnp which can help investors make profitable decisions

chasing trends at the micro level the effect of technical trading on order book dynamics abstract technical traders attempt to exploit trends in market prices and the order flow despite this little is known about how these traders behave in a micro structure context we consider a model of an order book based financial market the market contains two groups informed traders and technical traders a numerical technique is used to identify a markov perfect equilibrium of the trading game and so determine the optimal strategies we find that technical trading rules are profitable and allow traders to increase their returns the effect of technical traders on the market however is ambiguous they decrease volatility and pricing errors but also increase trading costs despite primarily acting as liquidity suppliers

investment under uncertainty and policy change in this paper the impact of a policy change on the investment behavior of the firm is studied in an incomplete information setting the policy change occurs when a stochastic process describing the state of the economic environment reaches a certain trigger the firm has incomplete information about the trigger and knows only its probability distribution consequently both the firm s conjecture concerning the trigger value as well as the precision of this conjecture serve as input parameters we derive the optimal investment rule maximizing the value of the firm and show that the impact of the trigger value uncertainty on the optimal investment threshold is non monotonic the threshold decreases with uncertainty for its low levels while the reverse is true if uncertainty is high furthermore we provide results concerning the valuation of the firm s investment opportunity and present some policy implications

last in first out oligopoly dynamics this paper extends the static analysis of oligopoly structure into an infinite horizon setting with sunk costs and demand uncertainty the observation that exit rates decline with firm age motivates the assumption of last in first out dynamics an entrant expects to produce no longer than any incumbent this selects an essentially unique markov perfect equilibrium with mild restrictions on the demand shocks sequences of thresholds describe firms equilibrium entry and survival decisions bresnahan and reiss 1993 empirical analysis of oligopolists entry and exit assumes that such thresholds govern the evolution of the number of competitors our analysis provides an infinite horizon game theoretic foundation for that structure

testing for market timing ability abstract in this paper we examine the henriksson merton test of market timing and its potential usefulness in evaluating investment advice the paper proposes a natural extension of the test that is valid under more general assumptions about the distribution of asset returns we show that the henriksson merton test and its more general counterpart are special cases of standard tests of market rationality and efficiency both tests are applied to a group of foreign exchange advisory services

financial returns and efficiency as seen by an artificial technical analyst abstract we introduce trading rules which are selected by an artificially intelligent agent who learns from experience an artificial technical analyst these rules restrict the data mining concerns associated with the use of simple technical trading rules as model evaluation devices and are good at recognising subtle regularities in return processes the relationship between the efficiency of financial markets and the efficacy of technical analysis is investigated and it is shown that the artificial technical analyst can be used to provide a quantitative measure of market efficiency we estimate this measure on the djia daily index from 1962 to 1986 and draw implications for the optimal behaviour of certain classes of investors it is also shown that the structure of technical trading rules commonly used is consistent with utility maximisation for risk neutral agents and in a myopic sense even for risk averse agents

timing of investments in oligopoly under uncertainty a framework for numerical analysis abstract we present a modeling framework for the analysis of investments in an oligopoly market for a homogenous commodity the demand evolves stochastically and the firms carry out investment projects in order to adjust their production cost functions or production capacities the model is formulated as a discrete time state space game where the firms use feedback strategies the firms are assumed to move sequentially to ensure a unique markov perfect nash equilibrium once the equilibrium has been solved monte carlo simulation is used to form probability distributions for the firms cash flow patterns and accomplished investments such information can be used to value firms operating in an oligopoly market an example of the model is given in a duopoly market the example illustrates the trade off between the value of flexibility and economies of scale under competitive interaction

charts noise and fundamentals in the london foreign exchange market this paper presents some empirical evidence on the prevalence perceived importance and nature of chartist or technical analysis in the london foreign exchange market if noise traders see e g de long et al i987 are defined as those speculators who do not base their trading strategies on a consideration of market fundamentals then it clearly encompasses those traders who employ chart analysis i e those who base their strategies on the analysis and extrapolation of past price movements alone

money as a medium of exchange in an economy with artificially intelligent agents abstract we study the exchange economies of kiyotaki and wright 1989 in which agents must use a commodity or fiat money as a medium of exchange if trade is to occur our agents are artificially intelligent and are modeled as using classifier systems to make decisions in the assignment of credit within the classifier systems we introduce some innovations designed to study sequential decision problems in a multi agent environment for most economies that we have simulated trading and consumption patterns converge to a stationary nash equilibrium even if agents start with random rules in economies with multiple equilibria the only equilibrium that emerges in our simulations is the one in which goods with low storage costs play the role of medium of exchange i e the fundamental equilibrium of kiyotaki and wright

beating the foreign exchange market filter rule profits found in foreign exchange markets in the early days of the current managed float persist in later periods as shown by statistical tests developed and implemented here the test is consistent with but independent of a wide variety of asset pricing models the profits found cannot be explained by risk if risk premia are constant over time inclusion of the home foreign interest rate differential in computing profits has little effect on the comparison of filter returns to those of buy and hold in the early years of the generalized managed floating that began in march 1973 filter rule profits in excess of buy and hold were found for many countries logue sweeney and willett 18 dooley and shafer 6 cornell and dietrich 5 it was unclear however whether such profits indicated inefficiencies first it was not clear that risk was adequately handled in such tests and often risk was ignored second there was no evidence such profits would be available postsample and third there was no statistical test of the significance of these profits this paper uses the logic of risk return tradeoffs to analyze the role of risk in such tests and illustrates the logic in a discussion using the sharpe lintner capital asset pricing model capm although a breeden consumption based capm a merton intertemporal capm or an arbitrage pricing model apm could easily be used the paper develops a test of statistical significance appropriate to foreign exchange markets section i analyzing the rate of return on foreign exchange speculation less the foreign domestic interest rate differential the test explicitly assumes that risk premia are constant over the sample the excess rates of return observable in using filters in going from a risk free dollar asset to a risk free deutsche mark dm asset persist into the 1980 s section ii and this is true even when taking account of transactions costs it turns out that these results for the dm case do not depend very much on the interestrate differential but primarily on exchange rate behavior this is useful to know because it is often quite difficult to find matching interest rate data of high quality for a sample of nine other currencies using only exchange rates section iii shows that the excess returns made in the first 610 days of the float persist in the next 1 220 days into the 1980 s dooley and shafer 7 find similar persistence in experiments that do not use buy and hold and have no significance tests when filter rule profits have been found in spot exchange markets it has often been argued that the profits are due to risk this paper uses the capm to analyze rates of return both to buy and hold and to filter strategies it turns out that the claremont mckenna college and claremont graduate school arthur d warga douglas joines and thomas d willett offered helpful comments and ning ning koo provided research assistance

the advantage to hiding one s hand speculation and central bank intervention in the foreign exchange market abstract we analyze an asymmetric information model of sterilized intervention in the foreign exchange market we characterize an equilibrium in which a central bank with inside information about its exchange rate target trades with risk averse speculators who have private information about future spot rates the model identifies circumstances in which perverse responses to intervention will be observed i e the domestic currency depreciates when the central bank purchases it and it provides conditions under which the exchange rate will be highly sensitive to intervention the model also provides an explanation for two forms of policy secrecy i secrecy about the scale of an intervention operation is always desirable ii secrecy about the target is sometimes desirable

slow adjustment and the level of government spending abstract a distortionary tax finances a public service and because of an adjustment cost the tax base adjusts slowly to any change in the tax rate i compare the steady state public service level with the level achieved using lump sum taxation first best utility is assumed to be additively separable if the government can commit the public service is unaffected by the adjustment rate and is likely to be less than the first best level however if the government cannot commit this outcome is time inconsistent if the government cannot commit but reoptimizes continuously the public service is affected by the adjustment rate a very slow adjustment rate causes the marginal cost of funds to be approximately unity and the public service to strictly exceed the first best level

investment uncertainty and pre emption this paper examines irreversible investment in a project with uncertain returns when there is an advantage to being the first to invest and externalities to investing when others also do so we show that the possibility of pre emption can have significant qualitative and quantitative effects on the relationship between uncertainty and investment in a single agent real options model the trigger threshold for investment increases without bound as uncertainty grows in contrast the investment trigger of a leader faced with pre emption is bounded above as uncertainty increases in fact we show that under certain parameter values greater uncertainty can lead the leader to invest earlier these findings reinforce the importance of extending real options analysis to include strategic interactions between players applications to industry situations are also discussed

option exercise games an application to the equilibrium investment strategies of firms under the standard real options approach to investment under uncertainty agents formulate optimal exercise strategies in isolation and ignore competitive interactions however in many real world asset markets exercise strategies cannot be determined separately but must be formed as part of a strategic equilibrium this article provides a tractable approach for deriving equilibrium investment strategies in a continuous time cournot nash framework the impact of competition on exercise strategies is dramatic for example while standard real options models emphasize that a valuable option to wait leads firms to invest only at large positive net present values the impact of competition drastically erodes the value of the option to wait and leads to investment at very near the zero net present value threshold copyright 2002 oxford university press

can markov switching models predict excess foreign exchange returns abstract this paper merges the literature on technical trading rules with the literature on markov switching to develop economically useful trading rules the markov models out of sample excess returns modestly exceed those of standard technical rules and are profitable over the most recent subsample a portfolio of markov and standard technical rules outperforms either set individually on a risk adjusted basis the markov rules high excess returns contrast with mixed performance on statistical tests of forecast accuracy there is no clear source for the trends but permitting the mean to depend on higher moments of the exchange rate distribution modestly increases returns

real options and preemption under incomplete information abstract this paper introduces incomplete information and preemption into an equilibrium model of firms facing real investment decisions the optimal investment strategy may lie anywhere between the zero npv trigger level and the optimal strategy of a monopolist depending on the distribution of competitors costs and the implied fear of preemption our model implies that the equity returns of firms which hold real options and are subject to preemption will contain jumps and positive skewness

informational efficiency and information subsets this paper proposes a new definition of the efficient markets hypothesis with respect to information which is more formal and precise than those of rubinstein 13 fama 4 jensen 6 and beaver 1 and which fits well as a framework for interpreting the many tests of the efficient markets hypothesis in the literature security markets are here considered efficient with respect to information set if and only if revealing to all agents would change neither equilibrium prices nor portfolios in addition to other desirable features this definition has the subset property efficiency with respect to implies efficiency with respect to any subset of

the use of technical analysis in the foreign exchange market abstract technica or chartist analysis of financial markets involves providing forecasts or trading advice on the basis of largely visual inspection of past prices without regard to any underlying economic or fundamental analysis this paper reports the results of a questionnaire survey conducted on behalf of the bank of england among chief foreign exchange dealers based in london in november 1988 amongst other findings it is revealed that at least 90 per cent of respondents place some weight on this form of non fundamental analysis when forming views at one or more time horizons there is also a skew towards reliance on technical as opposed to fundamentalist analysis at shorter horizons which becomes steadily reversed as the length of horizon considered is increased a very high proportion of chief dealers view technical and fundamental analysis as complementary forms of analysis and a substantial proportion suggest that technical advice may be self fulfilling jel f31

examining the effectiveness of price limits in an artificial stock market abstract this paper proposes an agent based framework to examine the effectiveness of price limits in an artificial stock market the market is composed of many boundedly rational and heterogeneous traders whose learning behavior is represented by a genetic programming algorithm we calibrate the model to replicate several stylized facts observed in real financial markets based on this environment the impacts of price limits are analyzed from the perspectives of volatility price distortion volume and welfare we find that the imposition of price limits possesses both positive and negative effects however compared with the market without price limits appropriate price limits help to reduce volatility and price distortion and increase the liquidity and welfare

a pigovian rule for the optimum provision of public goods abstract the integrated treatment of optimal taxation and public expenditure presented here is based on the dual relationship between the prices of private goods and the quantities of public goods the conditions for optimum public good provision can be expressed as a modification of the samuelson conditions with extra terms representing a the distortionary effect of taxes on the willingness to pay for the public good and b distributional effects the former captures pigou s notion of the indirect damage caused by the need to finance public expenditure out of distortionary taxes and we call this the pigou term in certain cases a very simple benefit cost ratio for public projects emerges that is equivalent to measuring benefits as if they were taxed

technical analysis and central bank intervention abstract this paper extends genetic programming techniques to show that us foreign exchange intervention information improves technical trading rules profitability for two of four exchange rates over part of the out of sample period rules trade contrary to intervention and are unusually profitable on days prior to intervention indicating that intervention is intended to halt predictable trends intervention seems to be more successful in checking such trends in the out of sample 1981 98 period than in the in sample 1975 80 period any improvement in performance results from more precise estimation of the relationship between current and past exchange rates rather than from information about contemporaneous intervention

linear non linear and essential foreign exchange rate prediction with simple technical trading rules abstract this paper investigates the predictability of spot foreign exchange rate returns from past buy sell signals of the simple technical trading rules by using the nearest neighbors and the feedforward network regressions the optimal choices for nearest neighbors hidden units in a feedforward network and the training set are determined by the cross validation method which minimizes the mean square error although this method is computationally expensive the results indicate that it has the advantage of avoiding overfitting in noisy environments and indicate that simple technical rules provide significant forecast improvements for the current returns over the random walk model

trading asymmetric trend and volatility by leverage trend garch in taiwan stock index this article develops a leverage trend generalized autoregressive conditional heteroscedasticity garch model by incorporating asymmetric trend of returns of the exponential autoregressive and asymmetric volatility of garch models to study the asymmetric effects using in sample daily data of taiex over the period 4 january 1980 to 25 august 1997 and postsample daily data over the period 26 august 1997 to 10 september 2007 the evidence reveals that a curvaceous risk return relationship and both asymmetric volatility and asymmetric trend of returns are significant in taiex the episode of asymmetric trend of returns is that the positive information creates a higher return trend than the negative information of the same amount while similarly to most studies the evidence of asymmetric volatility appears that the negative information makes a higher volatility than the positive information of the same size most remarkably we evidence that the volatility asymmetry effect is a conservative trading factor

optimal public good provision in the ramsey tax model a generalization abstract for the single consumer ramsey tax model the use of distortionary taxation to finance public good provision is shown to lower the optimal level of public good provision below its optimal value ina first best economy where lump sum taxation is available the assumptions used in the proof include a previous cobb douglas example as a special case

evaluating the power investment options with uncertainty in climate policy abstract this paper uses a real options approach roa for analysing the effects of government climate policy uncertainty on private investors decision making in the power sector it presents an analysis undertaken by the international energy agency iea that implements roa within a dynamic programming approach for technology investment choice case studies for gas coal and nuclear power investment are undertaken with the model illustrative results from the model indicate four broad conclusions i climate change policy risks can become large if there is only a short time between a future climate policy event such as post 2012 and the time when the investment decision is being made ii the way in which co 2 and fuel price variations feed through to electricity price variations is an important determinant of the overall investment risk that companies will face iii investment risks vary according to the technology being considered with nuclear power appearing to be particularly exposed to fuel and co 2 price risks under various assumptions and iv the government will be able to reduce investors risks by implementing long term say 10 years rather than short term say 5 years climate change policy frameworks contributions of this study include 1 having created a step function with stochastic volume of jump at a particular time to simulate carbon price shock under a particular climate policy event 2 quantifying the implicit risk premium of carbon price uncertainty to investors in new capacity 3 evaluating carbon price risk alongside energy price risk in investment decision making and 4 demonstrating roa to be a useful tool to quantify the impacts of climate change policy uncertainty on power investment

endogenous leadership in a new market in this article i analyze strategic investment under uncertainty in a new market where firms face a tradeoff between commitment and flexibility the model predicts asymmetric equilibria under fairly general conditions even though firms are ex ante identical and have symmetric opportunities to enter the market in equilibrium one firm commits to early investment and the other firm follows a wait and see strategy in the ex post outcome firms end up with asymmetric sizes if the market profitability turns out close to or lower than expected firms end up in symmetric position if the market turns out highly profitable if uncertainty is small the model yields approximately stackelberg outcomes

is technical analysis in the foreign exchange market profitable a genetic programming approach using genetic programming techniques to find technical trading rules we find strong evidence of economically significant out of sample excess returns to those rules for each of six exchange rates over the period 1981 1995 further when the dollar deutsche mark rules are allowed to determine trades in the other markets there is significant improvement in performance in all cases except for the deutsche mark yen betas calculated for the returns according to various benchmark portfolios provide no evidence that the returns to these rules are compensation for bearing systematic risk bootstrapping results on the dollar deutsche mark indicate that the trading rules detect patterns in the data that are not captured by standard statistical models

what do we know about investment under uncertainty recent theoretical developments relating to investment under uncertainty have highlighted the importance of irreversibility for the timing of investment expenditures and their expected returns this has subsequently stimulated a growing empirical literature which examines uncertainty and threshold effects on investment behaviour this paper presents a review of this literature a variety of methods have been used to investigate the empirical implication of irreversibility in investment the majority focusing on the relationship between investment flows and proxy measures of uncertainty a general conclusion is that increased uncertainty at both aggregate and disaggregate levels leads to lower investment rates this suggests that there is an irreversibility effect under which greater uncertainty raises the value of the call option to delay a commitment to investment this effect appears to dominate any positive impact on investment arising from the fact that greater uncertability under certain circumstances increases the marginal profitability of capital the methods used raise a number of issues which call into question the reliability of the findings and these are addressed in the paper however if such irreversibility effects are present then their omission from traditional investment models casts doubt on the efficacy of such specifications jel classification d81 d92 e22

a note on the weak form efficiency of capital markets the application of simple technical trading rules to uk stock prices 1935 to 1994 abstract brock et al 1992 found technical trading rules to have predictive ability with regards to the dow jones index the current paper considers whether this result can be replicated on uk data the paper also considers whether investors could earn excess returns from technical analysis in a costly trading environment the paper concludes that although the technical trading rules examined do have predictive ability in terms of uk data their use would not allow investors to make excess returns in the presence of costly trading

the cost of technical trading rules in the forex market a utility based evaluation we compute the opportunity cost for rational risk averse agents of using technical trading rules in the foreign exchange rate market we decompose this opportunity cost into two parts i a cost related to the misallocation of wealth which increases with the investor s level of risk aversion allocational cost and ii a cost related to the investor s erroneous belief regarding the sign of the expected excess return expectational cost we find that even for low levels of risk aversion the opportunity cost of using chartist rules tends to be prohibitively high

naive trading rules in financial markets and wiener kolmogorov prediction theory a study of technical analysis this article attempts a formal study of technical analysis which is a class of informal prediction rules often preferred to wiener kolmogorov prediction theory by participants of financial markets yet wiener kolmogorov prediction theory provides optimal linear forecasts this article investigates two issues that may explain this contradiction first the article attempts to devise formal algorithms to represent various forms of technical analysis in order to see if these rules are well defined second the article discusses under which conditions if any technical analysis might capture those properties of stock prices left unexploited by linear models of wiener kolmogorov theory copyright 1991 by university of chicago press