The index closed 6.74 points higher after gaining 6.32 points on June 20.
Trading on the Ho Chi Minh Stock Exchange (HoSE) rose by 28.72% to VND17.52 trillion (744.96 million USD).
The VN-30 basket, comprising the 30 largest capped stocks, saw 21 tickers gain.
Seven blue chips fell. VJC of budget airline Vietjet closed 1.2% lower and VHM of property giant Vinhomes lost 0.9%.
The HNX-Index at the Hanoi Stock Exchange, was up 1.31% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.74%.
