The index closed 11.86 points lower after losing 21.11 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange decreased by 27% to VND23.857 trillion (US$968.3 billion).
The VN-30 basket, comprising the 30 largest capped stocks, saw 3 tickers gained and 27 fell.
GVR of rubber company Vietnam Rubber Group gained 1.9% while HDB of lender HDBank and VNM of dairy giant Vinamilk both went up 0.4%.
Ten blue chips fell. VRE of retail real estate arm Vincom Retail went down 3.5%, BCM of industrial property developer Becamex IDC slid 3.2%, and MWG of electronics retail chain Mobile World decreased by 2.8%.
Foreign investors were net buyers to the tune of VND248 billion, mainly buying FRT of electronics retailer FPT Retail and STB of private lender Sacombank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, fell 1.05%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.62%.