The index closed 12.45 points higher after gaining 3.22 points on Thursday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 32% to VND18.35 trillion ($781.52 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 23 tickers gain.
VIB of Vietnam International Commercial Bank led with a 7% rise, followed by TCB of the largest private lender Techcombank, up 6.3%, and MBB of lender MB, up 4.8%.
MWG of electronics retail chain Mobile World rose 3.8% and SSI of leading brokerage SSI Securities Corporation closed 2.8% higher.
Four blue chips fell, including VJC of budget airline Vietjet with a 0.7% decline.
Foreign investors were net sellers to the tune of VND223.43 billion, mainly selling VPB of private lender VPBank and VNM of dairy giant Vinamilk.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.92% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.54%.