Ultra High Frequency (UHF) quotes and trades are examined in high resolution. Patterns which do not correspond to plausible market activity as in Brownlees and Gallo (2006) are observed. Noise other than microstructure noise is identified and diagnostic methods are evaluated. Extending...

This paper investigates the information content present in the quotes in an order driven market without the presence of designated market makers. A representation is proposed that recognises the ability of participants in such markets to observe market events and calibrate their quoting...