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Meteor Showers or Heat Waves? Heteroskedastic Intra-Daily Volatility in the Foreign Exchange Market

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Engle, Robert F., Ito, Takatoshi, Lin, Wen-Ling·1990·Econometrica

Abstract

This paper defines and tests a form of market efficiency called market dexterity which requires that asset prices adjust instantaneously and completely in response to new information. Examining the behavior of the yen/dollar exchange rate while each of the major markets are open it is possible to test for informational effects from one market to the next. Assuming that news has only country specific autocorrelation such as a heat wave. any intra-daily volatility spillovers (meteor showers) become evidence against market dexterity. ARCH models are employed to model heteroskedasticity across intra-daily market segments. Statistical tests lead to the rejection of the heat wave and therefore the market dexterity hypothesis. Using a volatility type of vector autoregression we examine the impact of news in one market on the time path of volatility in other markets.

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Metadata

Authors
Engle, R. F., Ito, T., & Lin, W.-L.
Venue
Econometrica
Publisher
JSTOR
Published
1990-05
Volume
58
Issue
3
Pages
525
ISSN
0012-9682 (ISSN-L)
OpenAlex
W1567579011
Cited by
840
References
0
FWCI
16.68
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Meteor Showers or Heat Waves? Heteroskedastic Intra-Daily Volatility in the Foreign Exchange Market. https://app.cochat.ai/papers/10.2307/2938189
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Engle, R. F., Ito, T., & Lin, W.-L. (1990). Meteor Showers or Heat Waves? Heteroskedastic Intra-Daily Volatility in the Foreign Exchange Market. Econometrica. https://doi.org/10.2307/2938189

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