Volatility in US and European equity markets: An assessment of market quality

Deniz Ozenbas, Robert A. Schwartz, Robert A. Wood

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The paper examines intra-day share price volatility over the year 2000 for five market centres: the New York Stock Exchange, Nasdaq, the London Stock Exchange, Euronext Paris and Deutsche Börse. In each of these markets, we observe a U-shaped intra-day volatility pattern, a particularly sharp spike for the opening half hour, and a general level of intra-day volatility that is accentuated vis-à-vis volatility over longer differencing intervals, e.g. daily and weekly periods. We suggest that the volatility accentuation is attributable to spreads, market impact, price discovery and momentum trading - all of which are either trading costs or exist because of trading costs. Because the magnitude of trading costs depends in part on market design, we also suggest that a link exists between intra-day volatility and market structure, and that market quality/efficiency on both sides of the Atlantic could be improved.

Original languageEnglish
Pages (from-to)437-461
Number of pages25
JournalInternational Finance
Issue number3
StatePublished - 2002


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