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Fabio Scacciavillani

1 May 1999
WORKING PAPER SERIES - No. 1
Details
Abstract
This paper proposes a forward-looking indicator of risk in the foreign exchange markets calculated from the implied volatilities of currency options according to the Garman-Kohlhagen model. We discuss the properties of such indicator and stress that it is related to a notion of risk that does not coincide with that of Gaussian risk underlying most mainstream models. We postulate that it is associated with a broader definition of risk, which we call hazard in order to avoid confusion. The properties of the Global Hazard Indicator (GHI) are assessed against the background of the market turbulence in 1998. This period has been characterized by abnormal fluctuations in the exchange rate markets spurred by a sequence of shocks in some emerging economies and in South East Asia, which have raised fear of contagion in developed countries.
JEL Code
F01 : International Economics→General→Global Outlook
F31 : International Economics→International Finance→Foreign Exchange
Related
1 June 2001
WORKING PAPER SERIES - No. 66
Details
Abstract
This paper examines the predictive properties of risk indicators for the foreign exchange markets. In particular it considers the predictive properties of historical volatilities and implied volatilities for movements in various bilateral exchange rates and compares them with the analogous properties of a composite indicator of risk, the Global Hazard Index (GHI). The GHI is a function of the implied volatility derived from currency options on the three major exchange rates, i.e. the euro-US dollar, the US dollar-yen and the euro-yen. For the empirical analysis this paper employs the concept of kernel volatility, which, loosely speaking, expresses the volatility of one variable conditional on the level of another. Simple regressions show that the levels of all the indicators on a particular day have a strong link to the variance of the nominal bilateral exchange rate on the next day. A strong overall influence is displayed by the GHI, especially for the currencies of small open economies.
JEL Code
F01 : International Economics→General→Global Outlook
F31 : International Economics→International Finance→Foreign Exchange