New Delhi, Oct. 14 -- Billionaire Kumar Mangalam Birla plans to commit up to $30 billion in investments over the next two to three years, despite mounting global uncertainties that he said have complicated investment decisions for his metals-to-retail conglomerate.

The proposed investment will span the group's businesses in India and international markets, Birla told reporters on the sidelines of the event. The conglomerate also intends to step up its spending in the United States.

"You either grow or you go down; you can't stay in a state of equilibrium," the Aditya Birla Group chairman said at the Bloomberg New Economy Forum in New Delhi on Tuesday.

"We are also increasing the investment in the US," he said.

Companies worldwide are ...