Trading patterns in the European Carbon Market: the role of trading intensity and OTC transactions

Iordanis Kalaitzoglou, Boulis Maher Ibrahim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
151 Downloads (Pure)


This paper examines the effect of trading intensity and OTC transactions on expected market conditions in the early development period of the European Carbon futures market. Past duration and trading intensity are used as information related order flow variables in modeling time between transactions in two new specifications of Autocorrelation Conditional Duration (ACD) models. This allows for specific investigation of non-linear asymmetric effects on expected duration and the impact of OTC transactions. Evidence is presented of two main types of trading episodes of increased and decreased trading intensity. Both have a significant impact on price volatility which increases further if an OTC transaction intrudes. OTC transactions also play a dual role. They slow down trading activity in the short term (over the next five transactions) but increase it substantially in the long term (over ten transactions). Both the liquidity and information price impact components increase following an OTC trade, but the information impact is greater. Price volatility calms down faster than liquidity effects following an OTC trade, and this is more pronounced in ECX and in Phase II. The combined evidence points towards increased market depth, efficiency and maturity of the trading environment.
Original languageEnglish
Pages (from-to)402–416
Number of pages35
JournalQuarterly Review of Economics and Finance
Issue number4
Early online date10 May 2013
Publication statusPublished - 2013


  • Carbon market
  • Duration Models
  • Ultra-high-frequency data

ASJC Scopus subject areas

  • Economics, Econometrics and Finance(all)
  • Energy(all)


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