[7] In December 2009, the London Stock Exchange Group agreed to take a 60% stake in trading platform Turquoise, which had a 7% share of the market.
[9] The next day internal technical problems discovered overnight forced the exchange to postpone the system's opening until 9:15am.
The London Stock Exchange said "preliminary investigations indicate that this human error may have occurred in suspicious circumstances".
[11] Turquoise has expanded to include the trading of Option and Future Derivatives with its new Electronic Sola Tradingderivatives platform launched in June 2011, started with the addition of FTSE Index 100 Futures contracts and has expanded to have FTSE 100 Options contracts in September 2011.
[23][24] In August 2022, Turquoise partnered with financial services firm M-DAQ to provide market participants with the ability to trade cross-currency securities and settle in their currency of choice.
[25] In September 2022, Turquoise announced the reintroduction of trading tariffs in an effort to boost its lit markets business.