Thyagaraju AdinarayanSaikat Chatterjee
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A trading screen is seen following the opening of the markets by British Chancellor of the Exchequer Philip Hammond and Chinese Vice-Premier Hu Chunhua at the London Stock Exchange in London, Britain June 17, 2019. REUTERS/Henry Nicholls/Pool
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Think of an exclusive poker game where the minimum bet is close to $1 million. The stock-trading version, "dark pools" that host blockbuster trades, are pulling in major money in Europe.
Their rise has been swift.
On June 24, 2016 - the day after the Brexit vote - just 3% of trades on the London Stock Exchange's Turquoise shares platform were carried out in its dark pool via so-called block trades, mega-bets of around $800,000 or more.