Switzerland’s stock exchange is set to adopt a new rulebook aimed at making the market more attractive to high-frequency trading firms, its new chief executive has said, despite the new breed of trader comes under growing scrutiny from regulators.

SIX Swiss Exchange is discussing potential changes - including allowing lower capital requirements - with existing and prospective members, according to new chief Christian Katz, who joined in May after three years running Swiss equities at Goldman Sachs. Lower capital requirements would allow firms to trade more with a given amount of money.