The index closed 1.83 points higher after gaining 7.05 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 27% to VND23.308 trillion (US$916.5 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 12 tickers gained.
PLX of fuel distributor Petrolimex went up 3.4%, SHB of the Saigon-Hanoi Commercial Joint Stock Bank closed 2.1% higher, SAB of brewer Sabeco rose 2.1%
Seventeen bluechips fell. VPB of private lender VPBank went down 1.3%, STB of Ho Chi Minh City-based lender Sacombank fell 1.2%, VJC of budget airline Vietjet slid 1.0%
Foreign investors were net seller to the tune of VND1279 billion, mainly selling VHM of property giant Vinhomes and TCB of the largest private lender Techcombank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.67%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.51%.