The index closed 10.66 points higher after gaining 2.41 points on Monday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 21.15% to VND8.25 trillion ($348.98 million).
Foreign investors turned net buyers to the tune of VND158.68 billion for the first time since Feb. 14. They mainly bought STB of Ho Chi Minh City-based lender Sacombank, CTG of state-owned lender VietinBank and HDB of HDBank.
The VN-30 basket, comprising the 30 largest capped stocks, saw 27 tickers gain.
MSN of conglomerate Masan Group gained 5.2%, followed by SSI of leading brokerage SSI Securities Corporation with a 3.5% rise.
HPG of steelmaker Hoa Phat Group went up 3.4% and HDB of HDBank gained 2.8%.
BID of state-owned lender BIDV rose 2.4%.
Only two blue chips fell. NVL of property developer Novaland Group lost 1.8% and TCB of the largest private lender Techcombank went down 0.4%.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.46% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.22%.