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What exactly is BATS Chi-X Europe?
I work at BATS Chi-X Europe and wanted to provide some clarity/answers to these questions. BATS Chi-X Europe is a Recognised Investment Exchange, so it is indeed a stock exchange.  Sometimes the term “equity market” could be used when explaining our business, but essentially we are a stock exchange.  As some background, BATS Chi-X Europe was formed by the acquisition of Chi-X Europe by BATS Trading in November 2011. At the time of the acquisition, each company operated as a Multilateral Trading Facility (MTF) for the trading of pan-European equities via a single trading platform. The category of MTF was introduced by MIFID (markets in Financial Instrument Directive) in 2007, which introduced competition in equities trading and allowed European stocks, to be traded on any European platform. Until 2007, many European stocks had to be traded only their local exchanges due to so-called “Concentration Rules”. Following the acquisition, BATS Chi-X Europe became the largest MTF in Europe, offering trading in more than 2,000 securities (2,700 securities by September 2013) across 15 major European markets, on a single trading platform.  In May 2013, BATS Chi-X Europe received Recognised Investment Exchange status from the UK Financial Conduct Authority, meaning that BATS Chi-X Europe has changed from an MTF status to full exchange status. In response to question 1: The equities traded on BATS Chi-X Europe are listed on stock exchanges such as the LSE but also listed on the other European Exchanges. The term “third party” equities is not particularly useful as all stock trading in Europe is generally a “second hand”  business referred to as “secondary market” trading. At the time of listing a firm issues shares; trading in these shares after the listing exercise is generally what happens in equity markets and these shares can be bought and sold on stock exchanges across Europe. Secondary market trading describes all trading on all exchanges or MTFs that takes place after the listing. In response to question 2: BATS Chi-X Europe trades over 2,700 stocks on its own trading platform. When trading on BATS Chi-X Europe, orders are executed on their own platform and will not end up of the LSE order books or platform. The fact that a stock was first listed on the LSE, does not mean that all trading in this stock happens via the LSE. However settlement process ensures that stocks end up being logged in a single depository. This means that a stock bought on BATS Chi-X Europe can be offset against the same stock sold on the LSE.  In response to question 3: As noted above, BATS Chi-X Europe received Recognised Investment Exchange (RIE) status from the UK Financial Conduct Authority in May 2013, meaning that BATS Chi-X Europe has changed from an MTF status to full stock exchange status. As an exchange / RIE, BATS Chi-X Europe is authorised to offer primary and secondary listings alongside its existing business.  According to the Federations of European Securities Exchanges (FESE), BATS Chi-X Europe has been the largest equity exchange in Europe by value traded in every month so far in 2013. In August, 24.1% of European equities trading in the 15 markets covered were traded on BATS Chi-X Europe. In July and August, the average notional value traded on BATS Chi-X Europe was around €7.2 billion per day. Hope this information is helpful.