CHAPTER IV METHOD OF CALCULATION OF TURNOVER TO DETERMINE THE PRINCIPAL TRADING VENUE FOR A SHARE (ARTICLE 16 OF REGULATION (EU) No 236/2012)
When calculating turnover pursuant to Article 16 of Regulation (EU) No 236/2012, the FCA shall use the best available information, which may include:
publicly available information;
transaction data obtained under Article 26(1) and (2) of Regulation 600/2014/EU;
information from trading venues where the relevant share is traded;
information provided by a supervisory authority of a third country;
information provided by the issuer of the relevant share;
information from other third parties, including data providers.
In determining what constitutes the best available information, the FCA shall ensure so far as reasonably possible that:
it uses publicly available information in preference to other sources of information;
the information covers all trading sessions during the relevant period, irrespective of whether the share traded during all of the sessions;
transactions received and included in the calculations are counted only once;
transactions reported through a trading venue but executed outside it are not counted.
The turnover of a share on a trading venue shall be deemed to be zero where the share is no longer admitted to trading on that trading venue even if the share was admitted to trading on the trading venue during the relevant calculation period.