The index closed 4.02 points higher after gaining 2.30 points on Tuesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 22.13% to VND17.93 trillion ($761.12 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 16 tickers gain.
NVL of property developer Novaland Group led with a 4% rise, followed by HPG of steelmaker Hoa Phat Group, up 3.1%.
MBB of lender MB went up 3% and BID of state-owned lender BIDV closed 2.4% higher.
Thirteen blue chips fell. GVR of Vietnam Rubber Group lost 1.5% and BCM of Becamex Investment and Industrial Development dropped 1.2%.
Foreign investors were net buyers to the tune of VND74.21 billion, mainly buying HPG and SHS of Saigon – Hanoi Securities.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was down 0.25% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.40%.