The index closed 0.02 points higher after gaining 5.30 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 11% to VND14.28 trillion ($581.67 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 11 tickers gained.
GVR of Vietnam Rubber Group led with a 4.9% rise, followed by GAS of state-owned Petrovietnam Gas, up 1.9%.
SAB of brewer Sabeco closed 1% higher and BVH of insurance company Bao Viet Holdings went up 0.9%.
Fourteen blue chips fell. VRE of retail real estate arm Vincom Retail dropped 1.9% and ACB of Asia Commercial Bank closed 1.3% lower.
Foreign investors were net sellers to the tune of VND136 billion, mainly selling PC1 of construction firm PC1 Group and VNM of dairy giant Vinamilk.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, fell 0.17%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.11%.