Shares declined on Wednesday morning as large-caps were hit by selling pressure.
The benchmark VN-Index on the Hồ Chí Minh Stock Exchange edged down 0.09 per cent to close at 986.35 points.
More than 92.3 million shares were traded on the southern bourse, worth VNĐ1.7 trillion (US$73 million).
The index rose 0.37 per cent to close Tuesday at 987.19 points.
Large-cap stocks such as Vietinbank (CTG), HDBank (HDB), Vietnam Airlines Corporation (HVN), Việt Nam National Petroleum Group (PLX), Vinhomes (VHM), Vicostone JSC (VCS) and Vinamilk (VNM) were strongly hit and caused the market indexes to drop below the reference level.
Among small and medium stocks, FLC Group JSC (FLC) extended its decline to 5 per cent to VND4,380 per share and 11.7 million shares were matched. Duc Quan Investment and Development Joint Stock Company (FTM) also decreased by 4.1 per cent to VNĐ3,770 per share.
The sectors that also saw stocks decrease were securities, insurance, oil and gas, banking, food and beverage, rubber production, seafood processing, construction and agriculture.
On the positive side, information and technology, wholesale, retail, real estate and healthcare were among the sectors that pushed up the market.
On the Hà Nội Stock Exchange, the HNX-Index lost 0.10 per cent to end at 104.39 points.
More than 9.8 million shares were exchanged on the northern bourse, worth VNĐ119 billion.
The northern market index rose 0.47 per cent to end Tuesday at 104.49 points.