Trading European Central Bank rumours on the EUR-USD exchange rate market

Baback Roodbar, Hugh Metcalf, Fabrizio Casalin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
13 Downloads (Pure)


This paper investigates whether the release of market-relevant news in the form of rumours on Twitter can explain the excess of market volatility previously attributed to private information, speculation, and noise traders. We define a simple theoretical model to show that the systematic information content of such rumours should result in detectable price effects in macro-markets. We then pinpoint the arrival of 63 rumours of forthcoming ECB actions over a 420-day sample of one-minute spot EUR-USD rates, and show that there is a real-time, intraday increase in market volatility. This largely unexplored information set can potentially account for significant amounts of unexplained volatility in macro-markets and, therefore, identify a possible explanation of one of the most prominent puzzles in price discovery research.
Original languageEnglish
Pages (from-to)53-70
JournalInternational Review of Financial Analysis
Early online date9 Nov 2018
Publication statusPublished - 1 Jan 2019


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