The index closed 3.96 points higher after gaining 6.55 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange decreased by 36% to VND16.30 trillion ($668.85 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 19 tickers gained.
STB of Ho Chi Minh City-based lender Sacombank rose 2.4%, followed by MBB of lender MB, up 2%.
BID of state-owned lender BIDV and GVR of Vietnam Rubber Group both gained 1.9%.
Eleven blue chips were in the red. POW of electricity producer Petrovietnam Power Corporation fell 1.3%, while SAB of brewer Sabeco dropped 0.8%.
Foreign investors were net sellers to the tune of VND420 billion, mainly selling VHM of property giant Vinhomes and MSN of conglomerate Masan Group.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.09%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.19%.