The index closed 4.47 points higher after gaining 4.33 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 20% to VND27.679 trillion (US$1.09 billion).
The VN-30 basket, comprising the 30 largest capped stocks, saw 18 tickers gained.
BCM of Becamex Investment and Industrial Development saw a 7.0% increase, BVH of insurer Bao Viet Holdings went up 3.7%, HDB of HDBank grew 2.3%.
Ten bluechips fell. VJC of budget airline Vietjet lost 2.4%, SHB of the Saigon-Hanoi Commercial Joint Stock Bank closed 1.3% lower, FPT of IT giant FPT Corporation slid 1.1%.
Foreign investors were net seller to the tune of VND820 billion, mainly selling VHM of property giant Vinhomes and MWG of electronics retail chain Mobile World.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.42%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.48%.