The National Fund collects windfall oil-export revenues.
At a cabinet session on February 14, Nazarbaev also urged the government not to allow price hikes and ordered a 10 percent increase in the salaries of employees of state companies.
Nazarbaev warned the cabinet that it might be replaced unless it "turns Kazakhstan into a paradise for investors."
The tenge's devaluation -- announced on February 11 -- sparked nationwide anxiety.
Dozens of protesters marched in Kazakhstan’s business capital, Almaty, on February 12-13, demanding "proper explanations" for the devaluation and the resignation of National Bank Chairman Qairat Kelimbetov.