UK to grant exemption allowing active trading firms to hold modest capital

High-speed trader slashes costs after $1.4bn purchase of rival KCG Holdings

US group plans to keep London office following its $1.4bn takeover of its rival

Yishidun fined Rmb300m for market manipulation and ordered to disgorge Rmb389m in profits

Regulatory approval for move would be group’s latest effort to shake up US equity market

Quantlab’s Smith is looking for ‘fun’ elsewhere and he is not the only one

Citic, Haitong and Guosen punished for helping trading during market downturn

Shift reflects incoming new rule under Mifid to keep pace with high-frequency trading

Wall Street’s ‘flash boys’ discover the flipside of disruption

Vincent Viola’s high-speed trading group acquires rival for $1.4bn

High-frequency trading group decides against increasing initial offer for rival

Hiring may spur questions over revolving door between Wall Street and Washington

High-frequency groups need new ways to get an edge as competition reshapes industry

City seen as desirable location for vital price-matching engines

Purchase by Quantlab comes as mounting costs make it harder to compete on speed alone

Bid for KCG comes as low levels of volatility are squeezing industry players

Interxion expansion underscores demand from banks and traders despite Brexit worries