The index closed 11.22 points higher, after losing 0.87 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 26.6% to VND13.79 trillion ($587.58 million).
Foreign investors were net buyers to the tune of VND125.43 billion, mainly buying KBC of industrial real estate developer Kinh Bac City and STB of Ho Chi Minh City-based lender Sacombank.
The HNX-Index at the Hanoi Stock Exchange, where mid and small-caps list, was up 1.23%, while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.68%.