The index closed 0.52 points higher after gaining 3.15 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 24% to VND19.889 trillion (US$782.5 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 12 tickers gained.
PLX of fuel distributor Petrolimex went up 5.8%, followed by GVR of Vietnam Rubber Group with a 4.0% growth.
POW of electricity producer Petrovietnam Power Corporation gained 3.1%.
Seventeen blue chips fell. SAB of brewer Sabeco slid 2.8%, VIC of private conglomerate Vingroup saw a 2.42% decline, and VRE of retail real estate arm Vincom Retail closed 2.40% lower.
Foreign investors were net seller for the 23th consecutive session. They net sold VND2.32 trillion, mainly selling HDB of lender HDBank and FPT of IT giant FPT Corporation.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.35%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.29%.