Ted Peake, Morgan Stanley's chief executive, said on Thursday that the bank would work with US regulators to see whether it could engage deeply in the cryptocurrency market. "The key for us is whether we, as a highly regulated Financial Institutions Group, can act as traders," Mr. Peake told CNBC at the World Economic Forum in Davos, Switzerland. "We will work with the Treasury and other regulators to see how we can provide this service in a safe way."