The index closed 3.94 points lower after dropping 1.82 points in the previous session. Trading on the Ho Chi Minh Stock Exchange fell 19% to VND16.283 trillion (US$639.6 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 22 tickers fell.
BCM of Becamex Investment and Industrial Development saw the biggest drop of 1.7%, followed by VRE of retail real estate arm Vincom Retail and VHM of property giant Vinhomes, both down 1.5%.
Only four bluechips gained. SSI of brokerage SSI Securities Corporation went up 0.7% and FPT of IT giant FPT Corporation increased by 0.5%.
ACB of Asia Commercial Bank grew 0.4% while TCB of the private lender Techcombank closed 0.1% higher.
Foreign investors were net seller to the tune of VND504 billion, mainly selling VHM of Vinhomes and HPG of steelmaker Hoa Phat Group.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.47%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.20%.