Nasdaq, one of the world's largest exchanges that is home to tech companies Nvidia, Apple and Amazon, is planning to submit paperwork with the US Securities and Exchange Commission to roll out round-the-clock trading of stocks, as it looks to capitalise on a global demand for US equities.Investor demand for nonstop trading in US stocks has surged in recent years, prompting regulators to introduce new rules and green-light proposals from major exchanges to enable trading beyond normal market hours.The US sto ...