The index went sideways throughout the day and closed 0.71 points higher. This is its seventh session in the green.
Trading value on the Ho Chi Minh Stock Exchange (HoSE), on which the index is based, fell 2.6 percent to VND22.19 trillion ($974 million).
The VN30 basket, comprising the 30 largest capped stocks, saw 17 tickers in the red, led by PNJ of Phu Nhuan Jewelry, down 2 percent.
SSI of leading brokerage SSI Securities Corporation lost 1.2 percent, ending a chain of three gaining sessions.
MSN of conglomerate Masan Group and NVL of real estate developer Novaland Group both fell 1 percent.
Eight blue chip tickers gained, with POW of electricity producer Petrovietnam Power Corporation rising 2.4 percent, and MWG of electronics retail chain Mobile World gaining 2 percent.
Foreign investors were net sellers to the tune of VND41 billion, with strongest pressure on HPG of steelmaker Hoa Phat Group and GMD of logistics company Gemadept Corp.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.36 percent while the UPCoM-Index for the Unlisted Public Companies Market gained 0.01 percent.