The index closed 5.20 points higher after gaining 3.11 points on Thursday. It is now at the highest since Feb. 21.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 7.12% to VND11.83 trillion ($503.93 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 15 tickers gain.
GVR of Vietnam Rubber Group led with a 5.4% rise, followed by VHM of property giant Vinhomes, up 3.9%.
HDB of HDBank went up 2.9% and SSI of leading brokerage SSI Securities Corporation gained 2.6%.
MSN of conglomerate Masan Group dropped 1.8% and VCB of state-owned lender Vietcombank closed 1.4% lower.
Foreign investors were net buyers to the tune of VND163.41 billion, mainly buying HPG of steelmaker Hoa Phat Group and VHM.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.75% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.35%.