OTTAWA — The head of one of Canada’s largest banks is urging the federal government to stem the flow of investment capital from this country to the United States — because, he warns, it’s already leaving in “real time.”

McKay told The Canadian Press that a “significant” investment exodus to the U.S. is already underway, especially in the energy and clean-technology sectors.

The flight of capital, McKay added, will likely be followed by a loss of talent, which means the next generation of engineers, problem solvers and intellectual property could be created not north of the border, but south of it instead.

“We would certainly encourage the federal government to look at these issues because, in real time, we’re seeing capital flow out of the country,” McKay said.