The influence of the forecast horizon on judgemental probability forecasts of exchange rate movements

An experiment is reported which compares directional forecasting performance of experts, novices and simple statistical models over three time horizons on a task involving probabilistic forecasts of exchange rate movements. Probability-judgement accuracy analyses illustrated no clear overall performance differences between experts and novices, but significant differences between the groups on various important components of judgement suggested that the groups obtained their similar overall scores using different cognitive strategies. Striking horizon effects and expertize–horizon interactions were also observed. The subjects performed better than a random walk forecaster, but worse than the random walk with constant drift and first-order autoregressive models. Composite human judgement, however, not only improved on individual judgement but, also, surpassed the simple statistical models in many instances. Possible explanations are offered for these results, suggestions are made for future research, and practical implications are emphasized.

[1]  Dilek Önkal-Atay,et al.  Currency forecasting: an investigation of extrapolative judgement , 1997 .

[2]  David Power,et al.  A note on the performance of foreign exchange forecasters in a portfolio framework , 1996 .

[3]  Andrew C. Pollock,et al.  An application of probability judgement accuracy measures to currency forecasting , 1996 .

[4]  Dilek Önkal,et al.  Effects of task format on probabilistic forecasting of stock prices , 1996 .

[5]  Pui Lam Leung,et al.  Combining ordinal forecasts with an application in a financial market , 1996 .

[6]  Dilek Önkal,et al.  Effects of feedback on probabilistic forecasts of stock prices , 1995 .

[7]  Dilek Önkal,et al.  An exploratory analysis of portfolio managers' probabilistic forecasts of stock prices , 1994 .

[8]  Bertrand C Jacquillat,et al.  Performance Measurement of Analysts' Forecasts , 1994 .

[9]  Ronald MacDonald,et al.  Combining exchange rate forecasts: What is the optimal consensus measure? , 1994 .

[10]  D. Önkal,et al.  Evaluating Probabilistic Forecasts of Stock Prices in a Developing Stock Market , 1994 .

[11]  L. Brown,et al.  Earnings Forecasting Research: Its Implications for Capital Markets Research , 1993 .

[12]  Nigel Harvey,et al.  Context-Sensitive Heuristics in Statistical Reasoning , 1993 .

[13]  Peter Ayton,et al.  Judgmental probability forecasting in the immediate and medium term , 1992 .

[14]  J. Frank Yates,et al.  Probabilistic forecasts of stock prices and earnings: The hazards of nascent expertise , 1991 .

[15]  Shinji Takagi,et al.  Exchange Rate Expectations: A Survey of Survey Studies , 1990, SSRN Electronic Journal.

[16]  Mark P. Taylor,et al.  Charts, Noise and Fundamentals in the London Foreign Exchange Market , 1990 .

[17]  Elli Gifford.  Technical Analysis of the Futures Markets , 1990 .

[18]  Spyros Makridakis,et al.  Factors affecting judgmental forecasts and confidence intervals , 1989 .

[19]  R. Clemen.  Combining forecasts: A review and annotated bibliography , 1989 .

[20]  M. Beenstock,et al.  The Performance of UK Exchange Rate Forecasters , 1986 .

[21]  K. Holden,et al.  An empirical investigation of combinations of economic forecasts , 1986 .

[22]  Marcus O'Connor,et al.  An examination of the accuracy of judgmental extrapolation of time series , 1985 .

[23]  Scott E. Hein,et al.  On the Accuracy of Time-Series, Interest Rate, and Survey Forecasts of Inflation , 1984 .

[24]  G. Brier,et al.  External correspondence: Decompositions of the mean probability score , 1982 .

[25]  B. Fischhoff,et al.  Calibration of probabilities: the state of the art to 1980 , 1982 .

[26]  A. Harvey.  Time series models , 1983 .

[27]  Anil K. Bera,et al.  Efficient tests for normality, homoscedasticity and serial independence of regression residuals , 1980 .

[28]  S. Goodman.  Foreign Exchange Rate Forecasting Techniques: Implications for Business and Policy , 1979 .

[29]  A. H. Murphy.  A New Vector Partition of the Probability Score , 1973 .

[30]  H. Lilliefors.  On the Kolmogorov-Smirnov Test for Normality with Mean and Variance Unknown , 1967 .

[31]  M. Bartlett.  On the Theoretical Specification and Sampling Properties of Autocorrelated Time‐Series , 1946 .