Vietnam will build powerful economic groups to help stabilize the macro economy, ensure major national balances and maintain social welfare, national security and defence. The commitment was reaffirmed by Prime Minister Nguyen Tan Dung at a conference in Hanoi on Friday  to review the operational efficiency of economic groups.  Currently, Vietnam has 12 state economic groups operating in key areas such as post and telecoms, coal and mineral, textile and energy. They make up 30 percent of total assets, more than half of equity and nearly 40 percent of employees of the entire state enterprise sector.