By Lars Mucklejohn UK-focused stock trading platform Etoro is exploring a New York IPO at a valuation of more than $3.5bn (£2.7bn) despite doing most of its business in Europe. The Israel-based firm’s founder and chief executive, Yoni Assia, told the Financial Times that it was considering a public listing in either New York or London amid a spike in activity on its platform. Assia said a US listing would give the company access to a broader range of investors than a presence on the UK market. As London’s stock market struggles with heavy investor outflows, several big names including insurer …