The index closed 13.77 points lower after dropping 2.15 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 37% to VND20.857 trillion (US$819.5 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 9 tickers gained.
POW of electricity producer Petrovietnam Power Corporation went up 1.0%, SHB of the Saigon–Hanoi Commercial Joint Stock Bank closed 0.9% higher, and VIC of private conglomerate Vingroup gained 0.5%.
Eighteen blue chips fell. GVR of Vietnam Rubber Group dropped 5.0%, followed by BCM of Becamex Investment and Industrial Development with a 2.1% decline and BID of state-owned lender BIDV, down 1.9%.
Foreign investors were net seller to the tune of VND1.17 trillion, mainly selling FUEVFVND of exchange-traded fund DCVFMVN DIAMOND and FPT of IT giant FPT Corporation.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, fell 1.03%, while the UPCoM-Index for the Unlisted Public Companies Market went down 1.03%.