Predicting Volatility in the Foreign Exchange Market
Posted: 4 May 2000
Measures of volatility implied in option prices are widely believed to be the best available volatility forecasts. In this paper, we examine the information content and predictive power of Implied Standard Deviations (ISD's) derived from CME options on foreign currency futures. The paper finds that statistical time- series models, even when given the advantage of "ex post" parameter estimates, are outperformed by ISD's. ISD's, however, also appear to be biased volatility forecasts. Using simulations to investigate the robustness of these results, the paper finds that measurement errors and statistical problems can substantially distort inferences. Even accounting for these, however, ISD's appear to be too variable relative to future volatility.
JEL Classification: F31
Suggested Citation: Suggested Citation